WO2024061236A1

WO2024061236A1 - Method for sending and receiving reference signal, and communication apparatus

Info

Publication number: WO2024061236A1
Application number: PCT/CN2023/119831
Authority: WO
Inventors: 董昶钊; 高翔; 刘鹍鹏
Original assignee: 华为技术有限公司
Priority date: 2022-09-20
Filing date: 2023-09-19
Publication date: 2024-03-28
Also published as: CN117792588A

Abstract

Provided in the present application are a method for sending and receiving a reference signal, and a communication apparatus. The method comprises: a network device determining a power ratio β; and the network device sending a reference signal to a terminal device on the basis of the power ratio β, wherein the power ratio β is associated with a first parameter, a configuration type of the reference signal and the number of first code division multiplexing (CDM) groups, the first parameter is associated with a first time-frequency resource occupied by the reference signal, and the first CDM groups are CDM groups that do not send data. A power ratio β is associated with a first parameter, a configuration type of a reference signal and the number of first CDM groups, such that the power ratio of a reference signal port can be indicated more flexibly, and thus the transmission power for sending the reference signal can be improved.

Description

Method and communication device for transmitting and receiving reference signals

This application claims priority to the Chinese patent application filed with the China Patent Office on September 20, 2022, with the application number 202211143839.1 and the invention title "Method and communication device for transmitting and receiving reference signals", the entire content of which is incorporated by reference. in this application.

Technical field

Embodiments of the present application relate to the field of communications, and more specifically, to methods and communications devices for transmitting and receiving reference signals.

Background technique

Multiple input multiple output (MIMO) technology is one of the key technologies of the fifth generation (the 5th Generation, 5G) communications. When MIMO is used to transmit data, the receiving device can perform channel estimation based on the received reference signal (for example, demodulation reference signal (DMRS)).

The transmit power of the reference signal is one of the factors that affects the accuracy of channel estimation. When the transmit power is larger, the accuracy of channel estimation is also higher. In order to make full use of the transmit power and improve the accuracy of channel estimation, the existing technology adopts the principle of full power utilization, that is, on the same time-frequency resource (for example, resource element (RE)), The transmit power of the idle port is lent to the active port. The relationship between the power borrowed by the active port from the idle port and the initial transmit power pre-configured by the network device to the active port can be determined by the power boosting value (or power compensation value, offset value) etc.) to express.

The power enhancement value corresponding to different ports is predefined in the new radio (NR) protocol, and the terminal device can determine the power enhancement value of each port according to the instructions of the network device. However, for scenarios that require more ports, using existing protocols to indicate the power enhancement value of each port is often not flexible enough.

Summary of the invention

Embodiments of the present application provide a method and communication device for transmitting and receiving reference signals, which can support more flexible indication of the power ratio of the reference signal port, thereby improving the transmission power of the reference signal.

The first aspect provides a method for sending a reference signal. The method may be executed by a network device, or may be executed by a chip or circuit configured in the network device. This application is not limited to this.

The method includes a network device determining a power ratio β; the network device sends a reference signal to a terminal device based on the power ratio β; wherein the power ratio β is related to a first parameter, a configuration type of the reference signal and a first code division multiplexing CDM The first parameter is associated with the first time-frequency resource occupied by the reference signal, and the first code division multiplexing CDM group is a CDM group that does not send data.

Based on the above solution, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, the network device can flexibly indicate the power ratio of the reference signal port, thereby improving the The transmit power used to send the reference signal.

With reference to the first aspect, in some implementations of the first aspect, the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.

Based on the above solution, the network device can use the index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, the number of time-frequency resources occupied by the reference signal and the time-frequency resource occupied by the data corresponding to the reference signal. At least one of the ratios of the numbers, the configuration type of the reference signal and the number of the first code division multiplexing CDM group can flexibly indicate the power ratio of the reference signal port, thereby improving the transmission power of sending the reference signal.

In connection with the first aspect, in some implementations of the first aspect, the reference signal is a first reference signal corresponding to a first port, the first port is a port in a first port set, and the first port set is The ports correspond to N CDM groups, and the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and N is an integer greater than or equal to 3.

For example, the ports in the first port set may be supported by a reference signal configuration type or reference signal pattern in the system. port.

Based on the above solution, for the reference signal port supported by the system corresponding to N CDM groups, and the value of N is greater than or equal to 3, by combining the power ratio β with the first parameter, the configuration type of the reference signal and the first code division multiplexing The number of CDM groups is associated, which can more flexibly indicate the power ratio of the reference signal port.

In combination with the first aspect, in certain implementations of the first aspect, the N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/4; or, the N is 4 or 5 or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

Based on the above scheme, for the reference signal ports supported by the system corresponding to N CDM groups, the value of N can be any one of 3, 4, 5 or 6, and for the case where there are reference signal ports with an occupied time-frequency resource density of 1/4 or 1/6 among the reference signal ports supported by the system, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM groups, the power ratio of the reference signal port can be indicated more flexibly.

In combination with the first aspect, in certain implementations of the first aspect, the first port set also includes a second port, and the ratio of the number of time-frequency resources occupied by the second reference signal of the second port to the number of time-frequency resources occupied by data corresponding to the second reference signal is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.

Based on the above solution, when the reference signal ports supported by the system correspond to N CDM groups, the value of N is greater than or equal to 3, and there are reference signal ports occupying different density of time-frequency resources in the reference signal port, by dividing the power ratio β is associated with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, and can more flexibly indicate the power ratio of the reference signal port.

In conjunction with the first aspect, in some implementations of the first aspect, the first parameter further includes the value of N.

Based on the above solution, when the currently scheduled reference signal includes an existing reference signal port, its power ratio can also be flexibly indicated.

With reference to the first aspect, in some implementations of the first aspect, the network device sends indication information to the terminal device, the indication information includes first indication information and second indication information, the first indication information indicates the reference signal Corresponding to the reference signal configuration type, the second indication information indicates the index of the antenna port associated with the reference signal.

Based on the above solution, the network device sends indication information to the terminal device, so that the terminal device can determine the power ratio of the reference signal port according to the indication information.

In combination with the first aspect, in some implementations of the first aspect, the network device determines a power scaling factor according to the power ratio β. The network device is based on the power scaling factor Sending the reference signal to the terminal device; wherein the power ratio β and the power scaling factor Satisfies the following relationship:

Combined with the first aspect, in some implementations of the first aspect, the network device is based on the power scaling factor and time-frequency resource mapping rules map the reference signal to the corresponding time-frequency resource, and send the reference signal to the terminal device through the time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
c＝1,2

n＝0,1,...
l′=0,1

in, is the power scaling factor, the power scaling factor And the power ratio β sum satisfies the following relationship: w _f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w _t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′; c represents the expansion capability coefficient; r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.

Combined with the first aspect, in some implementations of the first aspect, the network device is based on the power scaling factor and time-frequency resource mapping rules map the reference signal to the corresponding time-frequency resource, and send the reference signal to the terminal device through the time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
n＝0,1,...
l′=0,1

in, is the power scaling factor, which And the power ratio β satisfies the following relationship: _wf (k′) is the frequency domain mask element corresponding to the subcarrier indexed as k′, _wt (l′) is the time domain mask element corresponding to the OFDM symbol indexed as l′; r(2n+k′) is the element of the base sequence mapped onto the kth subcarrier and the lth symbol.

Based on the above solution, when the reference signal ports supported by the system correspond to N CDM groups, the value of N may be greater than or equal to 3, and there are reference signal ports occupying different densities of time-frequency resources in the reference signal port, through By associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, the network device can flexibly indicate the power ratio of the reference signal port, based on the power ratio and time-frequency resources The mapping rule maps the reference signal to the corresponding time-frequency resource, and the reference signal is sent through the time-frequency resource.

The second aspect provides a method for receiving a reference signal. The method may be executed by a terminal device, or may be executed by a chip or circuit configured in the terminal device. This application is not limited to this.

The method includes a terminal device determining a power ratio β; the terminal device receiving a reference signal based on the power ratio β; wherein the power ratio β is related to a first parameter, a configuration type of the reference signal and the number of first code division multiplexing CDM groups The first parameter is associated with the first time-frequency resource occupied by the reference signal, and the first code division multiplexing CDM group is a CDM group that does not send data.

Based on the above solution, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, the terminal device can flexibly receive the reference signal according to the power ratio of the reference signal port.

With reference to the second aspect, in some implementations of the second aspect, the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.

Based on the above solution, the terminal device can use the index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, the number of time-frequency resources occupied by the reference signal and the time-frequency resource occupied by the data corresponding to the reference signal. At least one of the ratios of the numbers, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, flexibly determine the power ratio of the reference signal port, and receive the reference signal.

Combined with the second aspect, in some implementations of the second aspect, the reference signal is a first reference signal corresponding to a first port, the first port is a port in the first port set, and the first port set The ports correspond to N CDM groups, and the N CDM The time-frequency resources corresponding to each CDM group in the group do not overlap, and N is an integer greater than or equal to 3.

With reference to the second aspect, in some implementations of the second aspect, N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by the data corresponding to the first reference signal. The ratio of the quantities is 1/4, or the N is 4 or 5 or 6. The ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

In conjunction with the second aspect, in some implementations of the second aspect, the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port corresponds to the second reference signal. The ratio of the number of time-frequency resources occupied by the data is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.

Combined with the second aspect, in some implementations of the second aspect, the first parameter further includes the value of N.

With reference to the second aspect, in some implementations of the second aspect, the terminal device receives indication information from the network device, the indication information includes first indication information and second indication information, the first indication information indicates the reference The reference signal configuration type corresponding to the signal, the second indication information indicates the index of the antenna port associated with the reference signal; the terminal device determines the power according to the reference signal configuration type corresponding to the reference signal and the index of the antenna port associated with the reference signal Ratio β.

Combined with the second aspect, in some implementations of the second aspect, the terminal device determines the power scaling factor according to the power ratio β The end device is based on this power scaling factor Receive the reference signal; where, the power ratio β and the power scaling factor Satisfy the following relationship:

Combined with the second aspect, in some implementations of the second aspect, the terminal device is based on the power scaling factor and time-frequency resource mapping rules to receive the reference signal on the corresponding time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
c＝1,2

n＝0,1,...
l′=0,1

in, is the power scaling factor, which And the power ratio β satisfies the following relationship: _wf (k′) is the frequency domain mask element corresponding to the subcarrier indexed as k′, _wt (l′) is the time domain mask element corresponding to the OFDM symbol indexed as l′; c represents the expansion capability coefficient; r(2n+k′) is the element of the base sequence mapped onto the kth subcarrier and the lth symbol.

Combined with the second aspect, in some implementations of the second aspect, the terminal device is based on the power scaling factor and time-frequency resource mapping rules to receive the reference signal on the corresponding time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
n＝0,1,...
l′=0,1

in, is the power scaling factor, the power scaling factor And the power ratio β sum satisfies the following relationship: w _f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w _t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′; r(2n+k′ ) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.

Based on the above scheme, when there are N CDM groups corresponding to the reference signal ports supported by the system, the value of N may be greater than or equal to 3, and there are reference signal ports with densities occupying different time-frequency resources among the reference signal ports, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM groups, the terminal device can flexibly determine the power ratio of the reference signal port, and receive the reference signal based on the power ratio and the time-frequency resource mapping rule.

In a third aspect, a method for sending a reference signal is provided. The method may be executed by a network device, or may be executed by a chip or circuit configured in the network device. This application is not limited to this.

The method includes: the network device generates a reference signal based on the power ratio β; the network device sends the reference signal to the terminal device; wherein the reference signal includes a first reference signal corresponding to a first port, and the first port is a first port set A reference signal port in, the first port set corresponds to N CDM groups, N is an integer greater than or equal to 2, the N CDM groups include at least one type of CDM group; the power ratio β The number, the configuration type of the reference signal and the first parameter are associated. The first CDM group is the CDM group that does not send data among the N CDM groups. The first parameter includes each type of the at least one type of CDM. The number of ports corresponding to the CDM group.

Based on the above solution, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, the network device can more flexibly indicate the power ratio of the reference signal port, and then can Increase the transmit power of the reference signal.

In conjunction with the third aspect, in some implementations of the third aspect, the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency The density of resources is different from the density of time-frequency resources occupied by the second type of CDM group. The first parameter includes the number n ₁ of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n ₂ .

Based on the above solution, when the reference signal ports supported by the system correspond to N CDM groups, and there are reference signal ports occupying different time-frequency resource densities in the reference signal ports, by comparing the power ratio β with the first parameter, the reference signal port The configuration type of the signal is related to the number of the first code division multiplexing CDM group, which can more flexibly indicate the power ratio of the reference signal port.

In conjunction with the third aspect, in some implementations of the third aspect, N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal. The ratio of the quantities is 1/4, or the N is 4 or 5 or 6. The ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

With reference to the third aspect, in some implementations of the third aspect, the network device sends indication information to the terminal device, the indication information includes first indication information and second indication information, the first indication information indicates the reference signal Corresponding to the reference signal configuration type, the second indication information indicates the index of the antenna port associated with the reference signal.

Combined with the third aspect, in some implementations of the third aspect, the network device determines the power scaling factor according to the power ratio β The network device is based on this power scaling factor Send the reference signal to the terminal device; where the power ratio β and the power scaling factor Satisfy the following relationship:

Combined with the third aspect, in some implementations of the third aspect, the network device is based on the power scaling factor and time-frequency resource mapping rules map the reference signal to the corresponding time-frequency resource, and send the reference signal to the terminal device through the time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence mapped on the k-th subcarrier and l-th symbol element Satisfy the following relationship:

k′=0,1
c＝1,2

n＝0,1,...
l′=0,1

Combined with the third aspect, in some implementations of the third aspect, the network device is based on the power scaling factor and time-frequency resource mapping rules map the reference signal to the corresponding time-frequency resource, and send the reference signal to the terminal device through the time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
n＝0,1,...
l′=0,1

Based on the above scheme, when there are N CDM groups corresponding to the reference signal ports supported by the system, the value of N may be greater than or equal to 3, and there are reference signal ports with densities occupying different time-frequency resources among the reference signal ports, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM groups, the network device can flexibly indicate the power ratio of the reference signal port, map the reference signal to the corresponding time-frequency resource based on the power ratio and the time-frequency resource mapping rule, and send the reference signal through the time-frequency resource.

The fourth aspect provides a method for receiving a reference signal. The method may be executed by a terminal device, or may be executed by a chip or circuit configured in the terminal device. This application is not limited to this.

The method includes: a terminal device determines a power ratio β; the terminal device receives a reference signal based on the power ratio β; wherein the reference signal includes a first reference signal corresponding to a first port, and the first port is a first port in the first port set. A reference signal port, the first port set corresponds to N CDM groups, N is an integer greater than or equal to 2, and the N CDM groups include at least one type of CDM group; the power ratio β is associated with the number of the first CDM group, the configuration type of the reference signal and the first parameter. The first CDM group is a CDM group that does not send data among the N CDM groups. The first parameter includes the The number of ports corresponding to each type of CDM group in at least one type of CDM.

In conjunction with the fourth aspect, in some implementations of the fourth aspect, the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency The density of resources is different from the density of time-frequency resources occupied by the second type of CDM group. The first parameter includes the number n ₁ of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n ₂ .

Based on the above scheme, for the case where the reference signal ports supported by the system correspond to N CDM groups, and there are reference signal ports with densities occupying different time-frequency resources among the reference signal ports, by associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM groups, the power ratio of the reference signal port can be flexibly indicated.

In conjunction with the fourth aspect, in some implementations of the fourth aspect, N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal. The ratio of the quantities is 1/4, or the N is 4 or 5 or 6. The ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

With reference to the fourth aspect, in some implementations of the fourth aspect, the terminal device receives indication information from the network device, the indication information includes first indication information and second indication information, the first indication information indicates the reference signal Corresponding reference signal configuration type, the second indication information indicates the index of the antenna port associated with the reference signal; the terminal device determines the first parameter according to the index of the antenna port associated with the reference signal, and determines the first parameter according to the first parameter, the reference signal The configuration type and the number of the first CDM group determine the power ratio.

Combined with the fourth aspect, in some implementations of the fourth aspect, the terminal device determines the power scaling factor according to the power ratio β and based on Receive the reference signal; where, the power ratio β and the power scaling factor Satisfy the following relationship:

Combined with the fourth aspect, in some implementations of the fourth aspect, the terminal device is based on the power scaling factor and time-frequency resource mapping rules to receive the reference signal on the corresponding time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
c＝1,2

n＝0,1,...
l′=0,1

in, is the power scaling factor, the power scaling factor And the power ratio β sum satisfies the following relationship: w _f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w _t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′; c represents the expansion capability coefficient; r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol white.

Combined with the fourth aspect, in some implementations of the fourth aspect, the terminal device is based on the power scaling factor and time-frequency resource mapping rules to receive the reference signal on the corresponding time-frequency resource, where the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
n＝0,1,...
l′=0,1

Based on the above solution, when the reference signal ports supported by the system correspond to N CDM groups, the value of N may be greater than or equal to 3, and there are reference signal ports occupying different densities of time-frequency resources in the reference signal port, through By associating the power ratio β with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, the terminal device can flexibly determine the power ratio of the reference signal port based on the power ratio and time-frequency resources. Mapping rules receive reference signals.

In a fifth aspect, a communication device is provided. The communication device includes a processing unit and a transceiver unit. The processing unit is used to determine the power ratio β; the transceiver unit is used to send a reference signal to the terminal device based on the power ratio β; wherein, The power ratio β is associated with a first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group. The first parameter is associated with the first time-frequency resource occupied by the reference signal. The first A code division multiplexing CDM group is a CDM group that does not send data.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the reference signal is a first reference signal corresponding to a first port, the first port is a port in the first port set, and the first port set is The ports correspond to N CDM groups, and the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and N is an integer greater than or equal to 3.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/4; or, the N is 4 or 5 or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port corresponds to the second reference signal. The ratio of the number of time-frequency resources occupied by the data is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the first parameter further includes the value of N.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the transceiver unit is also used to send indication information to the terminal device, the indication information including first indication information and second indication information, the first indication information indicating the reference signal configuration type corresponding to the reference signal, and the second indication information indicating the index of the antenna port associated with the reference signal.

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the processing unit is specifically configured to determine the power scaling factor according to the power ratio β The transceiver unit is specifically configured to based on the power scaling factor Send the reference signal to the terminal device; , the power ratio β and the power scaling factor Satisfy the following relationship:

In a sixth aspect, a communication device is provided. The communication device includes a processing unit and a transceiver unit. The processing unit is used to determine the power ratio β; the transceiver unit is used to receive a reference signal based on the power ratio β; wherein the power ratio β Associated with the first parameter, the configuration type of the reference signal and the number of the first code division multiplexing CDM group, the first parameter is associated with the first time-frequency resource occupied by the reference signal, the first code division multiplexing The CDM group is a CDM group that does not send data.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first parameter includes at least one of the following parameters: an index of the antenna port associated with the reference signal, an index of the time-frequency resource occupied by the reference signal, the The ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by the data corresponding to the reference signal.

In conjunction with the sixth aspect, in some implementations of the sixth aspect, the reference signal is a first reference signal corresponding to a first port, the first port is a port in the first port set, and the first port set is The ports correspond to N CDM groups, and the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and N is an integer greater than or equal to 3.

In conjunction with the sixth aspect, in some implementations of the sixth aspect, N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal. The ratio of the quantities is 1/4, or the N is 4 or 5 or 6. The ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

In conjunction with the sixth aspect, in some implementations of the sixth aspect, the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port corresponds to the second reference signal. The ratio of the number of time-frequency resources occupied by the data is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.

Combined with the sixth aspect, in some implementations of the sixth aspect, the first parameter further includes the value of N.

In conjunction with the sixth aspect, in some implementations of the sixth aspect, the transceiver unit is further configured to receive indication information from the network device, where the indication information includes first indication information and second indication information, the first indication The information indicates the reference signal configuration type corresponding to the reference signal, and the second indication information indicates the index of the antenna port associated with the reference signal; the processing unit is specifically configured to: according to the reference signal configuration type corresponding to the reference signal and the reference signal association The index of the antenna port determines the power ratio β.

In conjunction with the sixth aspect, in some implementations of the sixth aspect, the processing unit is specifically configured to determine a power scaling factor according to the power ratio β. The transceiver unit is specifically configured to: Receive the reference signal; wherein the power ratio β and the power scaling factor Satisfies the following relationship:

In a seventh aspect, a communication device is provided. The device includes a processing unit and a transceiver unit. The processing unit is used to generate a reference signal based on the power ratio β; the transceiver unit is used to send the reference signal to a terminal device; wherein, the reference The signal includes a first reference signal corresponding to a first port. The first port is a reference signal port in a first port set. The first port set corresponds to N CDM groups. N is an integer greater than or equal to 2. The N The CDM groups include at least one type of CDM group; the power ratio β is associated with the number of the first CDM group, the configuration type of the reference signal and the first parameter. The first CDM group is the N CDM group in which no data is sent. CDM group, the first parameter includes the number of ports corresponding to each type of CDM group in the at least one type of CDM.

In conjunction with the seventh aspect, in some implementations of the seventh aspect, the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency The density of resources is different from the density of time-frequency resources occupied by the second type of CDM group. The first parameter includes the number n ₁ of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n ₂ .

In conjunction with the seventh aspect, in some implementations of the seventh aspect, N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal. The ratio of the quantities is 1/4, or the N is 4 or 5 or 6. The ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

In conjunction with the seventh aspect, in some implementations of the seventh aspect, the transceiver unit is further configured to send indication information to the terminal device, where the indication information includes first indication information and second indication information, and the first indication information indicates The reference signal configuration type corresponding to the reference signal, and the second indication information indicates the index of the antenna port associated with the reference signal.

In conjunction with the seventh aspect, in some implementations of the seventh aspect, the processing unit is specifically configured to determine the power scaling factor according to the power ratio β The transceiver unit is specifically configured to based on the power scaling factor Send the reference signal to the terminal device; where the power ratio β and the power scaling factor Satisfy the following relationship:

In an eighth aspect, a communication device is provided. The device includes a processing unit and a transceiver unit. The processing unit is used to determine the power ratio β; the transceiver unit is used to receive a reference signal based on the power ratio β; wherein the reference signal includes The first reference signal corresponding to the first port. The first port is a reference signal port in the first port set. The first port set corresponds to N CDM groups. N is an integer greater than or equal to 2. The N CDM The group includes at least one type of CDM group; the power ratio β is associated with the number of the first CDM group, the configuration type of the reference signal and the first parameter. The first CDM group is a CDM that does not send data among the N CDM groups. group, the first parameter includes the number of ports corresponding to each type of CDM group in the at least one type of CDM.

In conjunction with the eighth aspect, in some implementations of the eighth aspect, the at least one type of CDM group includes a first type of CDM group and a second type of CDM group, and the first type of CDM group occupies a time-frequency The density of resources is different from the density of time-frequency resources occupied by the second type of CDM group. The first parameter includes the number n ₁ of reference signal ports corresponding to the first type of CDM group and the number of reference signal ports corresponding to the second type of CDM group. The number of ports n ₂ .

In conjunction with the eighth aspect, in some implementations of the eighth aspect, N is 3 or 4, and the number of time-frequency resources occupied by the first reference signal is equal to the number of time-frequency resources occupied by data corresponding to the first reference signal. The ratio of the quantities is 1/4, or the N is 4 or 5 or 6. The ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal is 1/6.

In conjunction with the eighth aspect, in some implementations of the eighth aspect, the transceiver unit is further configured to receive indication information from the network device, where the indication information includes first indication information and second indication information, and the first indication information indicates The reference signal configuration type corresponding to the reference signal, the second indication information indicates the index of the antenna port associated with the reference signal; the terminal device determines the first parameter according to the index of the antenna port associated with the reference signal, and determines the first parameter according to the first parameter , the configuration type of the reference signal and the number of the first CDM group determine the power ratio.

In conjunction with the eighth aspect, in some implementations of the eighth aspect, the processing unit is specifically configured to determine the power scaling factor according to the power ratio β The transceiver unit is specifically used according to Receive the reference signal; where, the power ratio β and the power scaling factor Satisfy the following relationship:

In a ninth aspect, a communication device is provided, including a processor. The processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any of the above first aspect, the third aspect and any possible implementation manner of the first aspect or the third aspect. Exemplarily, the communication device further includes a memory. The communication device also includes a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface.

For example, the transceiver may be a transceiver circuit. The input/output interface may be an input/output circuit.

In a tenth aspect, a communication device is provided, including a processor. The processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in any of the above second aspect, the fourth aspect, and any possible implementation manner of the second aspect or the fourth aspect. Exemplarily, the communication device further includes a memory. The communication device also includes a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver or an input/output interface.

In another implementation, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface.

In an eleventh aspect, a processor is provided, including: an input circuit, an output circuit and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation manner of the first to fourth aspects.

In the specific implementation process, the above-mentioned processor can be one or more chips, the input circuit can be an input pin, and the output circuit can be As an output pin, the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, the receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and the output A circuit may be the same circuit that functions as an input circuit and an output circuit at different times. The embodiments of this application do not limit the specific implementation methods of the processor and various circuits.

In a twelfth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any possible implementation manner of the first to fourth aspects.

For example, there are one or more processors and one or more memories.

For example, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated on the same chip as the processor, or can be set in different On the chip, the embodiment of the present application does not limit the type of memory and the arrangement of the memory and the processor.

It should be understood that the relevant data interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving capability information may be a process of the processor receiving input capability information. Specifically, the data output by the processor can be output to the transmitter, and the input data received by the processor can be from the receiver. Among them, the transmitter and receiver can be collectively called a transceiver.

The processing device in the above-mentioned twelfth aspect may be one or more chips. The processor in the processing device can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general processor, which is implemented by reading software codes stored in a memory, and the memory can Integrated in the processor, it can be located outside the processor and exist independently.

In a thirteenth aspect, a computer program product is provided. The computer program product includes: a computer program (which may also be called a code, or an instruction). When the computer program is run, it causes the computer to execute the above-mentioned first aspect to A method in any possible implementation manner of the fourth aspect.

In a fourteenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program (which may also be called a code, or an instruction) when it is run on a computer, so that the above-mentioned first aspect is achieved. The method in any possible implementation manner of the fourth aspect is executed.

In a fifteenth aspect, a communication system is provided, including at least one terminal device and at least one network device, for performing the method in any possible implementation manner of the first to fourth aspects.

Description of drawings

Figure 1 is a schematic diagram of a communication system to which the method of the embodiment of the present application is applicable.

Figure 2 is a reference signal pattern for two configuration types in the current standard.

Figure 3 is a schematic flow chart of a method for sending reference signals provided by an embodiment of the present application.

Figures 4 to 7 show several examples of reference signal patterns provided by embodiments of the present application.

Figure 8 is a schematic flowchart of another method of sending reference signals provided by an embodiment of the present application.

Figure 9 is a schematic diagram of a communication device provided by an embodiment of the present application.

Figure 10 is a schematic diagram of another communication device provided by an embodiment of the present application.

Figure 11 is a schematic block diagram of a network device according to an embodiment of the present application.

Figure 12 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as fifth generation ( ^5th generation, 5G) systems or new radio (NR), evolved packet core (EPC) , evolved packet system (EPS), evolved universal mobile telecommunication system (UMTS), evolved UMTS terrestrial radio access network (E-UTRAN), long term evolution (long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solution provided by this application can also be applied to future communication systems, such as the sixth generation mobile communication system.

The technical solutions of the embodiments of the present application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and Internet of things (IoT) communication systems or other communication systems.

The terminal equipment in the embodiment of this application may be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication equipment, user agent or user device.

The terminal device may be a device that provides voice/data to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some terminals can be, for example: mobile phones, tablets, laptops, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocols , SIP) telephone, wireless local loop (WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, which can Wearable devices, terminal devices in the 5G network or terminal devices in the future evolved public land mobile communication network (public land mobile network, PLMN), etc., are not limited in the embodiments of this application.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. Wearable devices can be a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing, and shoes. In other words, a wearable device is a portable device that can be worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiments of this application, the terminal device may also be a terminal device in the IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing human-machine Interconnection, an intelligent network that interconnects things.

In addition, terminal equipment can also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (some terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to network equipment. .

The network device in the embodiment of the present application may be a device used to communicate with a terminal device. The network device may be a next-generation base station (gNodeB, gNB) in a 5G communication system, a next-generation base station in a 6G mobile communication system, or a future mobile Base stations in communication systems or access nodes in WiFi systems, etc., evolved node B (evolved node B, eNB), wireless network controller (radio network controller, RNC), node B (node B, NB) in LTE systems ), base station controller (BSC), home base station (e.g., home evolved NodeB, or home Node B, HNB), base band unit (BBU), transmission reception point (TRP) , transmitting point (TP), base transceiver station (BTS), etc.

In a network structure, the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node and a user plane CU node, and a RAN device of a DU node. The network device may provide services for a cell, and a terminal device communicates with a base station through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a base station (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell. The small cell here may include: a metro cell, a micro cell, a pico cell, a femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services. The network device can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, a device that provides wireless communication services to user devices in a V2X communication system, a wireless controller in a cloud radio access network (CRAN) scenario, a relay station, a vehicle-mounted device, a wearable device, and a network device in a future evolution network. The embodiments of the present application are related to network devices. The specific technology and equipment used are not limited.

In this embodiment of the present application, the terminal device or the network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU) and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system or windows operating system, etc. This application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide according to the embodiment of the present application. For example, the execution subject of the method provided by the embodiment of the present application can be a terminal device or a network device, or a functional module in the terminal device or network device that can call a program and execute the program.

FIG. 1 is an exemplary architectural diagram of a communication system 100 suitable for embodiments of the present application. As shown in FIG. 1 , the communication system 100 may include at least one network device, such as the network device 101 shown in FIG. 1 . The communication system 100 may also include at least one terminal device, such as the terminal devices 102 to 107 shown in FIG. 1 . Among them, the terminal devices 102 to 107 can be mobile or fixed. The network device 101 may provide communication coverage for a specific geographical area, and the terminal devices 102 to 107 may be terminal devices located within the coverage area. Network device 101 and one or more of terminal devices 102 to 107 may each communicate via wireless links.

Optionally, the terminal devices may communicate directly with each other. For example, direct communication between the terminal devices may be achieved using device to device (D2D) technology. As shown in FIG1 , the terminal device 105 and the terminal device 106, and the terminal device 105 and the terminal device 107 may communicate directly using D2D technology. The terminal device 106 and the terminal device 107 may communicate with the terminal device 105 individually or simultaneously.

The terminal devices 105 to 107 can also communicate with the network device 101 respectively. For example, it can directly communicate with the network device 101. The terminal devices 105 and 106 in the figure can communicate directly with the network device 101; it can also communicate with the network device 101 indirectly, such as the terminal device 107 in the figure communicates with the network device via the terminal device 105. 101 Communication.

Each communication device in the communication system 100 shown in Figure 1 can be configured with multiple antennas. For each communication device, the plurality of antennas configured may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. Therefore, communication devices in the communication system 100 can communicate with each other through MIMO technology.

It should be understood that FIG. 1 is only a simplified schematic diagram for ease of understanding. The communication system 100 may also include other network devices or other terminal devices, which are not shown in FIG. 1 .

To facilitate understanding of the embodiments of the present application, the following first briefly introduces the terms and background involved in the present application.

1. Antenna port

Antenna ports are referred to as ports. It can be understood as a transmitting antenna recognized by the receiving end, or a transmitting antenna that can be distinguished in space. An antenna port can be configured for each virtual antenna, and each virtual antenna can be a weighted combination of multiple physical antennas. According to the different signals carried, antenna ports can be divided into reference signal ports and data ports. Among them, the reference signal port may include but is not limited to a DMRS port, a channel state information reference signal (channel state information reference signal, CSI-RS) port, etc.

This application includes existing ports and newly added ports. Existing ports refer to ports in existing protocols, or ports that support technical solutions in existing protocols; newly added ports refer to ports that can support the technical solutions of this application.

2. Time-frequency resources

In this embodiment of the present application, data or information may be carried through time-frequency resources. The time-frequency resources may include resources in the time domain and resources in the frequency domain. Among them, in the time domain, time-frequency resources may include one or more time domain units (may also be called time units, time units, etc.); in the frequency domain, time-frequency resources may include one or more frequency domain units.

Among them, a time domain unit can be one symbol or several symbols (such as OFDM symbols), or a time slot (slot), or a mini-slot (mini-slot), or a subframe (subframe). Among them, a time slot may be composed of 7 or 14 symbols; a mini-slot may include at least one symbol (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols) ;The duration of a subframe in the time domain may be 1 millisecond (ms). It should be understood that the above-mentioned time-domain unit sizes are only for the convenience of understanding the solution of the present application and do not limit the protection scope of the present application. It can be understood that the above-mentioned time-domain unit sizes can be other values, and are not limited by this application.

A frequency domain unit can be a resource block (RB), a subcarrier, a resource block group (RBG), a predefined subband, or a precoding resource. block group (precoding resource block group (PRG), a bandwidth part (BWP), a resource element (RE) (also called a resource unit or resource particle), or a carrier, or a serving cell.

3. Demodulation reference signal (DMRS)

In new radio (new radio, NR) systems, DMRS is used for data channels, such as physical uplink share channel (PUSCH) or control channels, such as physical downlink control channel (PDCCH), etc. Effective channel matrix estimation is used for detection and demodulation of data on the corresponding channel.

Taking the data channel PDSCH as an example, DMRS is usually precoded the same as the transmitted data signal, thereby ensuring that DMRS and data signals experience the same equivalent channel. Assume that the DMRS vector sent by the transmitter is s, the data signal vector sent is x, and the DMRS and data signals are precoded the same (multiplied by the same precoding matrix). The data signal vector y received by the receiving end and DMRS

in, represents the equivalent channel experienced by the data signal and DMRS, and n represents additive noise. Based on the known DMRS vector s, the receiving end uses channel estimation algorithms, such as least square (LS) channel estimation, minimum mean square error (MMSE) channel estimation, etc., to obtain the equivalent channel estimate. Demodulation of the data signal can be completed based on the equivalent channel.

With the introduction of MIMO technology into wireless communication systems, the transmitter can transmit multiple streams of data on the same time-frequency resources, and the receiver can recover all data. At this time, DMRS is used to estimate the equivalent channel matrix, and its dimension can be _NR ×R, where _NR represents the number of receiving antennas and R represents the number of transmission streams (also called the number of transmission layers and the number of spatial layers). Usually, one DMRS port corresponds to one transmission stream, that is, for MIMO transmission with R transmission streams, the required number of DMRS ports is R. In order to ensure the quality of channel estimation, the DMRS ports corresponding to multiple transmission streams are orthogonal ports.

For a DMRS port, in order to perform channel estimation on different time-frequency resources, multiple DMRS need to be sent on multiple time-frequency resources. Multiple DMRS corresponding to one port correspond to one DMRS sequence. A DMRS sequence includes multiple DMRS sequence elements.

Taking the DMRS sequence generated from the gold sequence as an example, the nth DMRS sequence element in the DMRS sequence r _l (n) can be generated by the following formula:

Among them, c(n) is a pseudo-random sequence, and c(n) can be a gold sequence with a sequence length of 31; for the sequence c(n) with an output length of M _PN , n=0,1,...,M _PN -1, which can be determined by formula (4):

Among them, N _C =1600, the first m sequence x ₁ (n) can be initialized as x ₁ (0) = 1, x ₁ (n) = 0, n = 1, 2,..., 30, and the second m sequences x ₂ (n) can be initialized by the parameter c _init , _which can be determined by formula (5):

Wherein, l represents the index value of an OFDM symbol in a time slot; is the number of symbols contained in a time slot; is a time slot index within a system frame; It is an initialization parameter, and its value can be 0 or 1; It can be configured by high-level signaling, which is related to the cell (identifier, ID), and can usually be equal to the cell ID; λ represents the code division multiplexing (code division multiplexing, CDM) group (group) index corresponding to the DMRS port.

The DMRS sequence corresponding to a DMRS port can be mapped to the corresponding time-frequency resource through the preset time-frequency resource mapping rules. For antenna port p (corresponding to DMRS port p), the m-th sequence element r(m) in the corresponding DMRS sequence can be calculated according to the public The mapping rule shown in Equation (6) is mapped to the RE with index (k, l) _{p, μ} :

Among them, the RE with index (k,l) _p,μ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain. is the DMRS modulation symbol corresponding to the DMRS port p on the RE with index (k,l) _p,μ , k′＝0,1; n＝0,1,...；l′＝0,1；Δ is the subcarrier offset factor；type1 and type2 represent the two DMRS configuration types defined in the current NR protocol respectively；μ is the subcarrier spacing； is the index of the starting OFDM symbol occupied by the DMRS modulation symbol or the index of the reference OFDM symbol; is a power scaling factor; w _f (k′) is a frequency domain mask element corresponding to a subcarrier indexed as k′, w _t (l′) is a time domain mask element corresponding to an OFDM symbol indexed as l′; m=2n+k′.

In the configuration type 1 mapping rule, the values of w _f (k′), w _t (l′), and Δ corresponding to DMRS port p can be found in Table 1 or TS 38.211 Section 6.4.1.1.3.

Table 1

In the configuration type 2 mapping rule, the values of w _f (k′), w _t (l′), and Δ corresponding to DMRS port p can be determined according to Table 2.

Table 2

In Table 1 and Table 2, λ represents the index of the CDM group, and the DMRS ports in the same CDM group occupy the same time-frequency resources.

4. DMRS configuration type

Figure 2 shows DMRS patterns for two configuration types. REs with different filling patterns in Figure 2 represent different CDM groups; P0, P1,..., P11 represent DMRS port 0 to DMRS port 11; the numbers on the horizontal axis represent the index of the symbol in a time slot, and the numbers on the vertical axis represent The index of the subcarrier within an RB.

It should be understood that DMRS occupied symbol 0 and occupied symbols 0 and 1 in Figure 2 are only examples, and the symbols occupied by DMRS in one time slot may also be other symbols, such as occupied symbol 1, or occupied symbols 1 and 2.

Referring to (a) of Figure 2, for single-symbol DMRS configuration type 1, up to four orthogonal DMRS ports are supported. The 4 DMRS ports are divided into 2 CDM groups (CDM group 0 and CDM group 1). Each CDM group supports up to 2 orthogonal DMRS ports. Among them, CDM group 0 includes DMRS ports P0 and P1, and CDM group 1 includes P2 and P3. The CDM groups are Frequency Division Multiplexing (FDM) (mapped on different frequency domain resources); the DMRS ports included in the CMD group are mapped on the same time domain resources (in the frequency domain in the form of comb teeth). method for resource mapping). The reference signals corresponding to the DMRS ports contained in the CDM group are distinguished by orthogonal cover codes (OCC), thereby ensuring the orthogonality of the DMRS ports in the CDM group.

Referring to (b) of Figure 2, the dual-symbol DMRS configuration type 1 supports up to 8 orthogonal DMRS ports. The 8 DMRS ports belong to 2 CDM groups (CDM group 0 and CDM group 1). Among them, CDM group0 includes P0, P1, P4 and P5; CDM group 1 includes P2, P3, P6 and P7. P0, P1, P4 and P5 are located in the same RE, and resource mapping is performed in the frequency domain in a comb-tooth manner. Similarly, P2, P3, P6 and P7 are located in the same RE and are mapped on the unoccupied subcarriers of P0, P1, P4 and P5 in a comb-tooth manner in the frequency domain. For a DMRS port, the occupied two adjacent subcarriers and two OFDM symbols correspond to an OCC sequence of length 4 (can be obtained by referring to Table 1).

(c) and (d) of Figure 2 respectively correspond to the time-frequency resource mapping methods of single-symbol DMRS and dual-symbol DMRS of configuration type 2. As shown in (c) of Figure 2, configuration type 2 single-symbol DMRS supports up to 6 orthogonal DMRS ports. The 6 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDM group 2). As shown in (d) of Figure 2, for dual-symbol DMRS configuration type 2, up to 12 orthogonal DMRS ports are supported. The 12 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDM group 2). For the sake of simplicity, the introduction of the CDM group with configuration type 2DMRS and the time-frequency resources occupied by each DMRS port is omitted here.

During each data transmission process, the network device needs to notify the terminal device of the assigned antenna port (DMRS port) and the DMRS configuration type. Therefore, the terminal device can perform the DMRS signal reception and channel estimation process in the corresponding time-frequency resources based on the allocated antenna port and in accordance with the DMRS symbol generation method and time-frequency resource mapping rules defined by the protocol.

Currently, the NR protocol defines semi-static configuration of DMRS type through high-level signaling (for example, radio resource control (RRC) signaling), and dynamic notification of allocated DMRS port index through downlink control information (DCI). Method. The details are as follows:

(1)RRC signaling configuration DMRS configuration type and number of occupied symbols

For example, the network device configures the configuration type of DMRS through high-level signaling DMRS-DownlinkConfig, where the dmrs-Type field can be used to indicate whether it is type 1 or type 2 DMRS; the maxLength field can be used to indicate whether single-symbol DMRS or dual-symbol DMRS is used. Symbol DMRS. If maxLength is configured as len2, DCI can be used to further indicate whether single-symbol DMRS or dual-symbol DMRS is used; if the maxLength field is not configured, single-symbol DMRS is used.

(2)DCI signaling notification

DCI signaling contains the Antenna port field, which can be used to indicate the allocated DMRS port index. For different DMRS-Type and maxLength configuration values, the NR protocol defines multiple DMRS port calling methods. Tables 3 to 6 respectively show the corresponding values of dmrs-Type=1, maxLength=1, dmrs-Type=1, maxLength=2, dmrs-Type=2, maxLength=1 and dmrs-Type=2, maxLength=2. Configuration table of DMRS port calling method. Among them, the Antenna port field indicates the "index value" column in the table, and each index value corresponds to one or more DMRS ports.

Table 3 (dmrs-Type=1, maxLength=1)

Table 4 (dmrs-Type=1, maxLength=2)

Table 5 (dmrs-Type=2, maxLength=1)

Table 6 (dmrs-Type=2, maxLength=2)

That is to say, the terminal device can determine the following information through the DCI signaling sent by the network device and combined with Table 3 to Table 6:

(1) Index of DMRS port

In Tables 3 to 6, the "index value (value)" can be obtained from the value indicated by the "Antenna port" field in the DCI, and the "DMRS ports (ports)" can be obtained according to the "index value". For example, if the terminal device obtains "Antenna port" = 3 by parsing DCI in a certain time slot, then by looking up the table, it can be seen that the DMRS port is 0, and the PDSCH and DMRS indicated by the current DCI are transmitted in antenna port 1000.

(2)The number of symbols occupied by DMRS

The number of symbols occupied by DMRS can be indicated by the "Number of leading symbols" column in the table. For example, when the value of the "Number of leading symbols" column is 1, it can mean that the number of symbols occupied by DMRS is 1, or in other words, it means that the DMRS It is a single-symbol DMRS; when the value of the "number of leading symbols" column is 2, it means that the number of symbols occupied by the DMRS is 2, or in other words, it means that the DMRS is a dual-symbol DMRS.

(3) Number of CDM groups that do not send data

The number of CDM groups that do not transmit data can be indicated by the "number of DMRS code division multiplexing CDM groups that do not transmit data" column in Table 3 to Table 6. According to different DMRS configuration types, this field can take three values: 1, 2, and 3.

For example, when the value is 1, it can indicate that the RE of the current CDM group 0 does not send data. For example, if the current timeslot schedules a port belonging to CDM group 0, then the RE of the current CDM group 0 does not send data, and the REs that are not mapped to DMRS on the symbols occupied by the currently scheduled DMRS can be scheduled for data; when the value is 2 , it can mean that the REs of the current CDM group 0 and CDM group1 do not send data; when the value is 3, it means that the REs of the current CDM group 0, CDM group 1 and CDM group 2 do not send data.

In the existing NR protocol, network equipment and terminal equipment can determine the power ratio β _DMRS of the DMRS port based on the “number of DMRS code division multiplexing CDM groups that do not send data”. β _DMRS may represent the ratio of the energy of data (eg, PDSCH) on each RE to the energy of DMRS on each RE. In other words, β _DMRS can represent the ratio of the energy on each RE carrying data to the energy on each RE carrying DMRS. Among them, the energy on RE can also be replaced by the power on RE.

As shown in Table 7, for different configuration types of DMRS, the protocol indicates the corresponding relationship between "the number of DMRS code division multiplexing CDM groups that do not send data" and β _DMRS . For the DMRS configuration types supported by the current NR protocol, the value of β _DMRS can be 0, -3, -4.77dB, corresponding to the power increase of 0dB, 3dB or 4.77dB for each RE carrying DMRS to each RE carrying PDSCH. .

Table 7

The network device can further determine the power scaling factor based on the value of β _DMRS The value of , as shown in formula (7):

Referring to formula (6), network equipment can be based on The value of In other words, network equipment is based on Generate DMRS sequence.

With the development of 5G multi-antenna technology, the number of transmission layers of data streams increases, and the corresponding number of DMRS ports also needs to increase, that is, the DMRS ports supported by the current system need to be expanded. Expanding the DMRS port can be implemented, for example, through frequency division multiplexing, that is, frequency domain resources of the existing DMRS port are multiplexed to the new DMRS port. Under the DMRS port expansion scheme, if the power ratio β _DMRS of each DMRS port is indicated according to the method defined in the above NR protocol, the indication is not flexible enough.

For example, the density of time-frequency resources occupied by a new DMRS port and an existing DMRS port may be different, and the power ratio β _DMRS of DMRS ports occupying different time-frequency resource densities may be different. For another example, for the simultaneous transmission of new DMRS ports and existing DMRS ports, the power ratio β _DMRS of the existing DMRS ports may be different from that indicated in the NR protocol; secondly, the expanded DMRS ports (including existing DMRS ports and new (Add DMRS port) The number of corresponding CDM groups may be greater than 3. The current protocol does not currently support indicating the power ratio of the DMRS port in the above situation.

In view of this, this application provides a method for transmitting and receiving reference signals by flexibly indicating the power of each reference signal port. The ratio can increase the reference signal power of each reference signal port and improve the utilization of the reference signal transmission power.

Before introducing the solution of this application, the following points should be explained:

(1) The symbol in this application refers to the OFDM symbol.

(2) For convenience of description, "x" in "symbol x" below represents the index of the symbol within a scheduling time unit. That is, "symbol x" represents the symbol with index x within one scheduling time unit. For example, symbol 0 represents the symbol with index 0 within a scheduling time unit.

Similarly, "x" in "DMRS port (Port)x" represents the index of the DMRS port (or DMRS port number), that is, "DMRS port x" represents the DMRS port with index x. For example, DMRS port 0 represents the DMRS port with index 0.

It should be noted that the index of the symbol and the index of the DMRS port may start from 0 or 1, or other numbers, which is not limited in this application. In order to facilitate understanding and explanation, in this application, the index of the symbol and the index of the DMRS port starting from 0 are taken as an example for description.

(3) The resource block RB involved in this application may refer to 12 consecutive subcarriers in the frequency domain. The resource element RE refers to one subcarrier in the frequency domain and one symbol in the time domain.

In the embodiment of the present application, for the convenience of distinction and explanation, the RE used to carry the reference signal is recorded as the reference signal RE. It can be understood that the reference signal RE does not necessarily carry the reference signal on each port. For a reference signal that determines a port, the RE it occupies can be determined based on the reference signal pattern. Correspondingly, the RE used to carry data is recorded as data RE. It can be understood that the data RE and the reference signal RE can be frequency division multiplexing (FDM) or time division multiplexing (TDM). )of.

(4) The density of time-frequency resources occupied by reference signals mentioned in the embodiments of this application may refer to the time-frequency resources (for example, RE) carrying the reference signals in a time-frequency resource group (for example, resource unit group (resource element group)). group, density in REG)). In other words, the "density" may refer to the proportion of time-frequency resources used to carry reference signals in a time-frequency resource group to the time-frequency resources in a time-frequency resource group.

For example, assuming that the density of time-frequency resources occupied by the reference signal is ρ, then ρ=B/P.

Among them, B represents the number of REs carrying reference signals in a REG (the number of REs occupied by reference signals), P represents the number of all REs included in the REG, or P represents the REs carrying data corresponding to the reference signals. The number (the number of REs occupied by the data corresponding to the reference signal).

It should be understood that the specific units of time-frequency resources listed above are only illustrative, and the present application is not limited thereto. For example, B can also represent the number of subcarriers carrying the reference signal (the number of subcarriers occupied by the reference signal) on the symbol corresponding to the reference signal in one RB, and P represents the number of all subcarriers included in the RB. Alternatively, P represents the number of subcarriers carrying data corresponding to the reference signal (the number of subcarriers occupied by data corresponding to the reference signal).

For example, referring to (b) of Figure 4 , the number of REs carrying the reference signal of the P0 port is 6, and the total number of REs in the REG is 12. Then the density of time-frequency resources occupied by the reference signal of the P0 port is 6/12=1/2; the number of REs carrying the reference signal of the P8 port is 3, then the density of time-frequency resources occupied by the reference signal of the P8 port is 3/12=1/4. For the sake of brevity, description of the same or similar situations is omitted below.

(5) The comb degree of the time-frequency resources occupied by the reference signal mentioned in the embodiment of the present application may be related to the density of the time-frequency resources occupied by the reference signal. For example, referring to (b) of Figure 4, the density of the time-frequency resources occupied by the reference signal of the P0 port is 1/2, then the comb degree of the time-frequency resources occupied by the reference signal of the P0 port is 2, and the P0 port can It is called a port with a comb degree of 2 (can be recorded as Comb-2); the density of time-frequency resources occupied by the reference signal of the P8 port is 1/4, then the reference signal of the P8 port occupies a comb of time-frequency resources The degree is 4, and the P8 port can be called a port with a comb degree of 4 (can be recorded as Comb-4).

(6) The situation of lending the transmission power of an idle port to an active port mentioned in the embodiment of this application is described in units of time-frequency resources. Specifically, it is described in units of RE. An idle port can be understood as the RE occupied by the port that carries no signals, and an active port can be understood as the RE occupied by the port carries signals (for example, including reference signals, data signals, etc.). Lending the transmit power of an idle port to an active port can be understood as compensating (or misappropriating) the transmit power pre-configured for a certain RE (for example, recorded as RE#0) that does not carry signals on a certain port. The other port carries an RE (for example, RE#1) of the reference signal, thereby achieving the effect of increasing the transmission power of the reference signal on RE#1. In the following, for the sake of brevity, description of the same or similar situations is omitted.

The following takes the reference signal as DMRS as an example, and describes in detail the method for sending and receiving reference signals in the embodiment of the present application in combination with the accompanying drawings. It should be understood that the network device in the following method may correspond to, for example, the network device 101 in FIG. 1, and the terminal device may be a device that communicates with the network device. Any one of the multiple terminal devices connected to the communication, such as any one of the terminal devices 102 to 107 in Figure 1.

It should be noted that in the embodiment of the present application, the reference signal is DMRS as an example to describe the technical solution of the embodiment of the present application, which shall not constitute any limitation to the present application. The reference signal in this application can be any reference signal that can be used for channel estimation, such as a cell-specific reference signal (CRS), or other reference signals that can be used to implement the same or similar functions. In communication systems that may appear in the future, the name of the reference signal may change, but as long as it is essentially the same as DMRS, the technical solution of this application should be applicable.

Figure 3 is a schematic flowchart of a method 300 for transmitting and receiving reference signals provided by an embodiment of the present application. The method 300 may include the following steps.

S310: The network device determines the power ratio β.

The power ratio β is the power ratio corresponding to the currently scheduled reference signal port. The network device may determine the reference signal of the currently scheduled reference signal port according to the power ratio β.

The power ratio β is associated with the configuration type of the reference signal, the number of the first code division multiplexing CDM group and the first parameter. In other words, when the configuration type of the reference signal is determined, the power ratio β has a first corresponding relationship with the number of the first CDM group and the first parameter.

Wherein, the currently scheduled reference signal port belongs to the first port set. The first port set includes M reference signal ports, and the M reference signal ports may be the maximum number of reference signal ports that the system can support. The M reference signal ports correspond to N CDM groups, and each of the N CDM groups corresponds to at least one reference signal port. The at least one reference signal port multiplexes the same time-frequency resource, such as RE, in a code division manner. The time-frequency resources occupied by at least one reference signal port corresponding to different CDM groups do not overlap. In other words, the same time-frequency resources are multiplexed between N CDM groups through frequency division. M and N are integers greater than or equal to 2. .

It should be understood that the port set is introduced in this application only to facilitate the description of the relationship between reference signal ports occupying different time-frequency resources. In actual implementation, there may not be a concept of a set, but for the characteristics of the reference signal ports corresponding to different CDM groups, for example, the occupied time-frequency resources, you can refer to the description of the characteristics of the reference signal ports in the port set in this application. The above description of the first port set can also be understood as a description of the reference signal configuration type or reference signal pattern. The first port set corresponds to a reference signal configuration type or reference signal pattern.

It can be understood that the values of N and/or M corresponding to different reference signal configuration types are different. In the embodiment of this application, for example, the values of N and M may include the following situations.

Case 1: The value of N can be 3 or 4, and the value of M can be 6 or 8 respectively, or the value of M can be 12 or 16 respectively;

Case 2: The value of N can also be 4, 5 or 6, which corresponds to the value of M to 8, 10 or 12 respectively, or the value to which M corresponds to is 16, 20 or 24 respectively.

Among them, the first situation can correspond to the situation of extending the reference signal port supported by the existing reference signal configuration type 1 (refer to (a) and (b) of Figure 2); the second situation can correspond to the situation of expanding the existing reference signal configuration type 2 (Refer to (c) and (d) of Figure 2) The case of supported reference signal port expansion.

For example, reference signal patterns corresponding to the reference signal configuration types involved in this application can be referred to any of the drawings in Figures 4 to 7 and related descriptions.

Further, in an embodiment of the present application, the currently scheduled reference signal port may include at least one port among the reference signal ports supported by the first reference signal configuration type. The first reference signal configuration type includes N ₁ CDM groups, where N ₁ is an integer greater than or equal to 2. The at least one port may include a first port, the first port corresponds to one CDM group among the N ₁ CDM groups, and the density of the time-frequency resources occupied by the reference signal of the first port is 1/4 or 1/6.

Optionally, the at least one port may also include a second port, the second port corresponds to one CDM group among the N ₁ CDM groups, and the CDM group corresponding to the second port is different from the CDM group corresponding to the first port. . In other words, the time-frequency resources occupied by the second port do not overlap with the time-frequency resources occupied by the first port (the time-frequency resources occupied by the second port are frequency division multiplexed with the time-frequency resources occupied by the first port). The density of time-frequency resources occupied by the reference signal of the second port is different from the density of time-frequency resources occupied by the reference signal of the first port.

In the case where N ₁ and the density of the time-frequency resources occupied by the reference signal of the first port have different values, the density of the time-frequency resources occupied by the second port may include four situations.

Case 1: The value of _N1 may be 3, the density of the time-frequency resources occupied by the reference signal of the first port is 1/4, and the density of the time-frequency resources occupied by the reference signal of the second port is 1/2.

Case 2: The value of N ₁ can be 4, the density of time-frequency resources occupied by the reference signal of the first port is 1/4, and the density of time-frequency resources occupied by the reference signal of the second port is 0, or in other words , the second port is not included in the first reference signal configuration type, or in other words, the reference signal ports of the reference signal ports supported by the first reference signal configuration type all occupy the same density of time-frequency resources.

Case 3: The value of N ₁ is 4, the density of the time-frequency resources occupied by the reference signal of the first port is 1/6, and the density of the time-frequency resources occupied by the reference signal of the second port is 1/3.

Case 4: The value of N can also be 5 or 6. The density of the time-frequency resources occupied by the reference signal of the first port is 1/6, and the density of the time-frequency resources occupied by the reference signal of the second port is 1 respectively. /3 or 0.

When the reference signal configuration type of the currently scheduled reference signal port is determined, for example, the reference signal configuration type of the currently scheduled reference signal port is the first reference signal configuration type, and the above-mentioned first CDM group can be the reference signal The CDM group that does not send data among the N CDM groups of the configuration type. For example, the CDM group corresponding to the currently scheduled reference signal port is a CDM group that does not transmit data.

The first parameter is associated with the time-frequency resource occupied by the reference signal. The first parameter may include at least one of the following:

The index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, and the density of the time-frequency resource occupied by the reference signal. The index of the time-frequency resource occupied by the reference signal is, for example, the index of the subcarrier occupied by the reference signal.

In the case where the power ratio β of the reference signal port is associated with the configuration type of the reference signal, the number of the first code division multiplexing CDM group and the first parameter, the network device determines the configuration type of the currently scheduled reference signal. The number of the first CDM group and the first parameter can determine the power ratio β.

Specifically, the network device may determine the configuration type of the currently scheduled reference signal based on the number of currently transmitted data streams. The specific process of the network device determining the reference signal configuration type may refer to existing relevant descriptions. The network device can determine the number of CDM groups that do not send data among the N CDM groups based on the currently scheduled reference signal ports. The currently scheduled reference signal port corresponds to a reference signal configuration type, and the N CDM groups are the reference signals. CDM group corresponding to the reference signal port supported by the configuration type. There is a second corresponding relationship between the currently scheduled reference signal port and the number of CDM groups that do not send data.

It should be understood that the second correspondence relationship may be pre-configured in the network device. For example, the second correspondence relationship may be as shown in Table 16 to Table 21.

The network device may directly or indirectly determine the first parameter. For example, the network device may directly determine the index of the antenna port associated with the currently scheduled reference signal port. For another example, the network device may determine the index of the time-frequency resource of the reference signal port by determining the index of the antenna port of the currently scheduled reference signal port, referring to the foregoing formula (6). For another example, the network device may determine the density of the reference signal time-frequency resource by determining the index of the reference signal time-frequency resource.

By associating the power ratio of the reference signal port with the first parameter, the configuration type of the reference signal, and the number of the first CDM group, the power ratio of the reference signal port can be indicated more flexibly (for example, different densities of occupied time-frequency resources can be indicated) The power ratio of the reference signal port), thereby increasing the transmission power of the reference signal.

Optionally, the power ratio value may also be associated with the value of N, that is, the power ratio value is associated with the total number of CDM groups in the first port set, or in other words, is associated with the total number of CDM groups included in the current reference signal configuration type.

It can be understood that when the reference signal port is expanded, a reference signal port may correspond to an existing reference signal configuration type or a new reference signal configuration type. Among them, the newly added reference signal configuration type can be understood as the reference signal configuration type including the new reference signal port. When the reference signal port belongs to different reference signal configuration types, the power that can be improved corresponding to the same first parameter and the first number of CDM groups may be different, that is, the power ratio may be different. In order to indicate the power ratio of the reference signal port more flexibly, the power ratio can be associated with the value of N.

S320, the network device sends a reference signal to the terminal device based on the power ratio β. Correspondingly, the terminal device receives the reference signal from the network device.

Specifically, the network device may determine the power scaling factor based on the power ratio β And determine the reference signal based on the power scaling factor. Among them, the power ratio β and the power scaling factor satisfy the following relationship:

The network device can map the reference signal to the corresponding time-frequency resource according to the time-frequency resource mapping rules, and use the time-frequency resource to The terminal device sends this reference signal. For example, when the reference signal configuration type is an existing reference signal configuration type, the time-frequency resource mapping rule may refer to the above formula (6) and formula (7). In the case where the reference signal configuration type is a newly added reference signal configuration type, the time-frequency resource mapping rules can refer to Equation (8) to Equation (11).

S330: The network device sends instruction information to the terminal device. Correspondingly, the terminal device receives the indication information from the network device.

The indication information is used to indicate the configuration type of the reference signal and the index of the antenna port associated with the reference signal.

Specifically, step S330 may include the network device sending first indication information to the terminal device, where the first indication information indicates the configuration type of the reference signal.

For example, the first indication information may be carried in a radio resource control RRC message. The configuration type of the reference signal may be an existing reference signal configuration type or a new reference signal configuration type.

Step S330 may also include the network device sending second indication information to the terminal device, the second indication information indicating the index of the antenna port associated with the reference signal.

For example, the second indication information may be carried in downlink control information DCI.

The index of the antenna port associated with the reference signal is the index of the antenna port associated with the currently scheduled reference signal.

Through S330, the terminal device can determine the configuration type of the reference signal and the index of the antenna port associated with the reference signal (an example of the first parameter), so that the first CDM group number can be determined based on the second correspondence. Further, the terminal device may determine the power ratio β of the currently scheduled reference signal port according to the first CDM group number, the first parameter and the first correspondence.

It can be understood that the terminal device can pre-configure the first corresponding relationship and the second corresponding relationship. Wherein, when the first parameter in the first correspondence relationship is the index of the time-frequency resource occupied by the reference signal or the density of the time-frequency resource occupied by the reference signal, the terminal device may be based on the index of the antenna port associated with the reference signal. The index of the time-frequency resource occupied by the reference signal or the density of the time-frequency resource occupied by the reference signal is determined, and then the power ratio β is determined based on the first corresponding relationship.

Optionally, S340, the terminal device determines the reference signal based on the power ratio.

For example, the terminal device may determine the power scaling factor based on the power ratio β and based on this power scaling factor To determine the reference signal, for details, reference may be made to the description of the network device determining the reference signal in S320.

Taking the reference signal as DMRS as an example, and combining different DMRS configuration types, the following describes in detail the corresponding relationship between the power ratio β and the first parameter and the number of the first CDM group in S310. It should be understood that in Figures 4 to 7 mentioned below, the numbers on the horizontal axis represent the index of the symbol in a time slot, and the numbers on the vertical axis represent the index of the subcarrier in one RB.

The DMRS patterns shown in Figures 4 and 5 may be DMRS patterns extended to ports supported by DMRS configuration type 1. The DMRS pattern shown in Figure 4 may be a DMRS pattern extended to the ports supported by single-symbol DMRS configuration type 1 ((a) of Figure 4). The DMRS pattern shown in Figure 5 may be a DMRS pattern extended to a port supported by dual-symbol DMRS configuration type 1 ((a) of Figure 5).

The DMRS patterns shown in FIG6 and FIG7 may be DMRS patterns obtained by expanding the ports supported by DMRS configuration type 2. The DMRS pattern shown in FIG6 may be a DMRS pattern obtained by expanding the ports supported by single-symbol DMRS configuration type 2 (such as (a) in FIG6 ). The DMRS pattern shown in FIG7 may be a DMRS pattern obtained by expanding the ports supported by dual-symbol DMRS configuration type 2 (such as (a) in FIG7 ).

Figure 4 (b) and Figure 4 (c) show DMRS patterns corresponding to two new DMRS configuration types (for simplicity, they are marked as DMRS configuration type 1a and DMRS configuration type 1b respectively).

Specifically, CDM group 0 and/or CDM group 1 in single-symbol DMRS configuration type 1 can be sparsely designed to obtain DMRS configuration type 1a and DMRS configuration type 1b.

As shown in (b) of Figure 4, DMRS configuration type 1a is a sparse design of CDM group 1 in single-symbol DMRS configuration type 1. The sparse design of CDM group 1 is as follows: Frequency division multiplexing of part of the subcarriers occupied by CDM group 1 to add two new DMRS ports (for example, ports P10 and P11). The time-frequency resources of the corresponding DMRS ports of CDM group 0 are not changes occur. It can also be said that the time-frequency resources of CDM group 1 are divided into two groups (for example, divided into CDM group 2 and CDM group 3). Among them, CDM group 2 corresponds to the new ports P10 and P11. Since the original time-frequency resources of CDM group 1 were divided into two groups, the time-frequency resources corresponding to the original ports P2 and P3 have changed. In order to flexibly indicate the location of the time-frequency resources corresponding to the DMRS port index, the original P2 and P3 can be The P3 port index is updated to P8 and P9. P8 and P9 correspond to CDM group 3, and P8 and P9 can also be called new ports.

When the DMRS configuration type is DMRS configuration type 1a, the DMRS pattern supports up to 6 DMRS ports (P0, P1, P8 to P11). The 6 DMRS ports correspond to 3 CDM groups (CDM group 0, CDM group2, CDM group3).

That is, when the DMRS configuration type is DMRS configuration type 1a, the value of the total number of CDM groups N is 3 and the value of M is 6. The density of the time-frequency resources occupied by the DMRS of the DMRS port corresponding to CDM group 2 or CDM group 3 (including the above-mentioned first port) is 1/4; the DMRS occupation of the DMRS port corresponding to CDM group 0 (including the above-mentioned second port) is The density of time-frequency resources is 1/2.

In an example, a currently scheduled DMRS port (DMRS port #1) is used as an example to illustrate the first correspondence relationship corresponding to the DMRS configuration type 1a. The DMRS port #1 may be any DMRS port supported by DMRS configuration type 1a.

In the case where the value of N is 3, the number of CDM groups that do not transmit data in the DMRS configuration type 1a may be 1, 2 or 3.

Corresponding to the same number of CDM groups that do not transmit data in the DMRS configuration type 1a, when DMRS port #1 is a DMRS port with different densities of occupied time and frequency resources, the power ratio is different. The determination of the power ratio includes two situations.

Case 1: DMRS port #1 is P0 or P1

That is, DMRS port #1 is an existing port, or in other words, DMRS port #1 is a port that occupies a time-frequency resource density of 1/2 (Comb-2 port). For convenience of description, the following takes DMRS port #1 as P0 as an example. The situation where DMRS port #1 is P1 is similar to the situation where DMRS port #1 is P0.

When the number of CDM groups that do not send data in the DMRS configuration type 1a is 1, the RE corresponding to the CDM group 0 carries the DMRS reference signal, and the RE corresponding to the CDM group 2 and CDM group 3 carries the DMRS port #1 corresponding data (for example, PDSCH). At this time, there is no RE that can "borrow" power, that is, the power of each RE carrying DMRS is the same as the power of each RE carrying PUSCH, that is, the power ratio is 0.

When the number of CDM groups that do not send data in the DMRS configuration type 1a is 2, the RE corresponding to the CDM group 0 carries the DMRS reference signal, and the RE corresponding to one of the CDM group 2 and CDM group 3 does not Carrying signals, the RE corresponding to another CDM group carries the data corresponding to DMRS port #1. At this time, the power of REs that do not carry signals can be "borrowed" to REs that carry DMRS. Since the number of REs that can be borrowed (REs corresponding to CDM group 2 or CDM group 3) is 1/2 times the number of REs corresponding to DMRS port #1, the power of REs carrying DMRS can be increased to 1.5 times the original. That is, the power of each RE carrying DMRS is 1.5 times the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(1.5), which is -1.76dB.

When the number of CDM groups that do not send data in the DMRS configuration type 1a is 3, the RE corresponding to CDM group 0 carries DMRS reference signals, and the REs corresponding to CDM group 2 and CDM group 3 do not carry signals. At this time, the number of REs that can be borrowed (REs corresponding to CDM group 2 and CDM group 3) is 1 times the number of REs corresponding to DMRS port #1. Therefore, the power of REs carrying DMRS can be increased to 2 times. That is, the power of each RE carrying DMRS is twice the power of each RE carrying PUSCH, and the power ratio is -10*log10(2), which is -3dB.

Case 2: DMRS port #1 is P8, P9, P10 or P11

That is, DMRS port #1 is a newly added port, or in other words, DMRS port #1 is a port that occupies a time-frequency resource density of 1/4 (Comb-4 port). For convenience of description, the following takes DMRS port #1 as P8 as an example. The situation where DMRS port #1 is P9, P10 or P11 is similar to DMRS port #1 being P8.

When the number of CDM groups that do not send data in the DMRS configuration type 1a is 1, the RE corresponding to the CDM group 3 carries the DMRS reference signal, and the RE corresponding to the CDM group 0 and CDM group 2 carries the DMRS port #1 corresponding data (e.g., PDSCH). At this time, the power ratio is 0.

When the number of CDM groups that do not send data in the DMRS configuration type 1a is 2, the RE corresponding to the CDM group 3 carries the DMRS reference signal, and the RE corresponding to a CDM group in the CDM group 0 and CDM group 2 does not Carrying signals, the RE corresponding to another CDM group carries the data corresponding to DMRS port #1. At this time, the power of REs that do not carry signals can be "borrowed" to REs that carry DMRS. The number of REs that can be borrowed (REs corresponding to CDM group 0 or CDM group 2) is at least twice the number of REs corresponding to DMRS port #1. Therefore, the power of REs carrying DMRS can be increased to at least 2 times of the original, that is, the power of REs carrying DMRS can be increased to at least 2 times. The power of each RE of DMRS is at least 2 times the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(2), which is -3dB.

Similarly, when the number of CDM groups that do not send data in the DMRS configuration type 1a is 3, the power of each RE carrying DMRS is 3 times the power of each RE carrying PUSCH, that is, the power ratio is -10*log10(3), which is -4.77dB.

In other words, when the currently scheduled DMRS port is a new port, for terminal equipment that supports the new port, the total number of the CDM group may be 4. When the number of CDM groups that do not transmit data in DMRS configuration type 1a is N ₂ , the power of the RE carrying DMRS can be increased to N ₂ times of the original, that is, the power ratio is -10*log10(N ₂ ).

As shown in (c) of Figure 4, DMRS configuration type 1b is a sparse design of CDM group 0 and CDM group 1 in single-symbol DMRS configuration type 1. Specifically, part of the subcarriers occupied by CDM group 1 in DMRS configuration type 1 is frequency division multiplexed with the new two DMRS ports (such as P10 and P11), and part of the subcarriers occupied by CDM group 0 is frequency division multiplexed with the new Two additional DMRS ports (such as P14 and P15). It can also be said that the time-frequency resources of CDM group 0 and CDM group 1 are divided into two groups. The time-frequency resources of CDM group 0 are divided into two groups (for example, divided into CDM group 4 and CDM group 5); the time-frequency resources of CDM group 1 are divided into two groups (for example, divided into CDM group 2 and CDM group 3 ). After sparse design of CDM group 0 and CDM group 1 in single-symbol DMRS configuration type 1, CDM group 4 corresponds to the new ports P12 and P13, CDM group 3 corresponds to the new ports P8 and P9; CDM group 5 corresponds to the new ports P14 and P15, CDM group 2 correspond to the new ports P10 and P11.

When the DMRS configuration type is DMRS configuration type 1b, the DMRS pattern supports up to 8 DMRS ports (P8 to P15), and 8 DMRS ports correspond to 4 CDM groups. That is, the value of N, the total number of CDM groups mentioned above, is 4, and the value of M is 8.

The following takes the currently scheduled DMRS port (DMRS port #1) as any one of the DMRS ports supported by the DMRS configuration type 1b as an example to illustrate the first correspondence relationship corresponding to the DMRS configuration type 1b.

Since the DMRS ports supported by the DMRS configuration type 1b are all new ports, when the number of CDM groups that do not send data in the DMRS configuration type 1b is N ₂ , the power of the RE carrying DMRS can be increased to N ₂ times. , that is, the power ratio is -10*log10(N ₂ ).

In the case where the value of N is 4, the number of CDM groups that do not transmit data in the DMRS configuration type 1b may be 1, 2, 3 or 4. That is, the value of N ₂ can be 1, 2, 3 or 4.

When N ₁ =1, the power ratio is zero.

When N ₁ is 2, 3 or 4, the corresponding power ratios are -10*log10(2), -10*log10(3) or -10*log10(4) respectively, which is -3dB, -4.77dB or -6dB.

Figure 5(b) and Figure 5(c) show DMRS patterns corresponding to two new DMRS configuration types (denoted as DMRS configuration type 1c and DMRS configuration type 1d respectively).

The DMRS configuration type 1c and DMRS configuration type 1d may be DMRS configuration types extended to the ports supported by dual-symbol DMRS configuration type 1. Specifically, CDM group 0 and/or CDM group 1 in dual-symbol DMRS configuration type 1 can be sparsely designed to obtain DMRS configuration type 1c and DMRS configuration type 1d.

As shown in (b) of Figure 5, DMRS configuration type 1c is a sparse design of CDM group 1 in dual-symbol DMRS configuration type 1. As shown in (c) of Figure 5, DMRS configuration type 1d is a sparse design of CDM group0 and CDM group 1 in dual-symbol DMRS configuration type 1. The sparse design of CDM group 0 and/or CDM group 1 is similar to the sparse design of CDM group 0 and/or CDM group 1 in Figure 4, and will not be described again.

When the DMRS configuration type is DMRS configuration type 1c, the DMRS pattern supports up to 12 DMRS ports (P0, P1, P4, P5, P8-P15). 12 DMRS ports correspond to 3 CDM groups (CDM group 0, CDM group 3 and CDM group 2). That is, the value of N, the total number of CDM groups mentioned above, is 3, and the value of M is 12.

When the DMRS configuration type is DMRS configuration type 1d, the DMRS pattern supports up to 16 DMRS ports (P8 to P23). 16 DMRS ports correspond to 4 CDM groups (CDM group 2 to CDM group 5). That is, the value of N, the total number of CDM groups mentioned above, is 4, and the value of M is 16.

When the DMRS configuration type is DMRS configuration type 1c or 1d, the number of CDM groups that do not send data can be 1, 2, 3 or 4. The first corresponding relationship is similar to the case where the DMRS configuration type is DMRS configuration type 1a or 1b, and will not be described again.

In summary, when the DMRS configuration type of the scheduled DMRS port is any one of the DMRS configuration types 1a to 1d, the first correspondence relationship may be as shown in Table 8.

Table 8

Among them, "/" means any value, or that the information of the column is not considered.

In this embodiment of the present application, in order to distinguish existing ports from new ports, the index of the new port can be set to be greater than or equal to "x". Among them, x can be the maximum index of the existing port plus n. Illustratively, the value of n may be 1. For example, when the existing port is a port supported by DMRS configuration type 1, the value of x can be 8. Therefore, existing ports (ports supported by existing DMRS configuration type 1) and new ports can be distinguished through the relationship between the DMRS port index and "8". That is, the "antenna port" column may be indicated as a size relationship with "8". The value of n can also be greater than 1, which is not limited in this application.

It should be understood that the “antenna port” may also indicate an index of a specific antenna port, for example, the “antenna port” column may be indicated as “8, 9, 10 . . . ”.

Optionally, the "antenna port" may also indicate the index of the time-frequency resource occupied by the DMRS (for example, the index of the subcarrier) or the density of the time-frequency resource occupied by the DMRS (for example, 1/2, 1/4 or 1/6 ). In the case where the "antenna port" indicates the index of the time-frequency resources occupied by the DMRS or the density of the time-frequency resources occupied by the DMRS, the network device or the terminal device can determine the information of the time-frequency resources occupied by the DMRS port through the index of the DMRS port, For example, the index of time-frequency resources and the density of time-frequency resources.

It can be understood that for DMRS port P0 or P1, it may belong to the existing DMRS configuration type 1, or may belong to DMRS configuration type 1a or DMRS configuration type 1c. In order to be compatible with the above two possible situations and indicate the power ratio of the reference signal port more flexibly, the power ratio can be associated with the total number of CDM groups in the DMRS configuration type. Applicable to DMRS configuration type 1, the first correspondence relationship between DMRS configuration type 1a to DMRS configuration type 1d can be as shown in Table 9 below.

Table 9

According to the solution of the embodiment of this application, while adding DMRS ports, it can also be compatible with existing terminal equipment (Rel.15 terminals, or terminal equipment that supports existing ports), that is, the terminal equipment provided by this application and only Supports multi-user pairing of terminal equipment with existing standard capabilities. Existing terminal equipment does not require any hardware and software updates. Compatibility with existing terminal equipment means that when performing multi-user pairing, existing terminal equipment and new terminal equipment (Rel.18 terminals, or terminal equipment that supports new ports) can be scheduled together on the same time-frequency resources. transmission.

Further, when the scheduled DMRS port is a port supported by DMRS configuration type 1, DMRS configuration type 1a to DMRS configuration type 1d, it is assumed that DMRS configuration type 1, DMRS configuration type 1a to DMRS configuration type 1d correspond to other ports supported All time and frequency resources are used to carry DMRS, or in other words, it is assumed that all other ports are occupied. In this case, the first correspondence relationship is as shown in Table 10.

Table 10

In Table 10, when the scheduled DMRS port is a port supported by DMRS configuration type 1, DMRS configuration type 1a to DMRS configuration type 1d, and the number of CDM groups that do not send data is 1, there is no way to "borrow" power. RE, that is, the power of each RE carrying DMRS is the same as the power of each RE carrying PUSCH, and the power ratio is 0.

When the number of CDM groups that do not send data is 2, the scheduled DMRS ports are ports supported by DMRS configuration type 1. The REs corresponding to CDM group 0 and CDM group 1 in DMRS configuration type 1 carry DMRS reference signals. At this time, the scheduled DMRS port can be the port corresponding to CDM group 0 or CDM group 1. Therefore, the power of the RE carrying DMRS can be increased to twice the original value, that is, the power ratio is -10*log10(2), which is -3dB.

When the number of CDM groups that do not send data is 3, the scheduled DMRS port is a port supported by DMRS configuration type 1a or 1c, and the scheduled DMRS port can be an existing port or a newly added port. The REs corresponding to CDM group 0, CDM group 2, and CDM group 3 in the DMRS configuration type carry DMRS reference signals. When the scheduled port is an existing port, the power of the RE carrying DMRS can be increased to twice the original, that is, the power ratio is -10*log10(2), that is, -3dB; when the scheduled port is a newly added port, the power of the RE carrying DMRS can be increased to four times the original, that is, the power ratio is -10*log10(4), that is, -6dB.

When the number of CDM groups that do not send data is 4, the scheduled DMRS ports are ports supported by DMRS configuration type 1b or 1d, and the scheduled DMRS ports are all new ports. In the DMRS configuration type, CDM group 2 to CDM The RE corresponding to group 5 carries the DMRS reference signal. When the scheduled port is a new port, the power of the RE carrying DMRS can be increased to 4 times the original, that is, the power ratio is -10*log10(4), which is -6dB.

In another example, multiple currently scheduled DMRS ports are used as an example to illustrate the first correspondence relationship between DMRS configuration types 1a to 1d.

Case 1: For DMRS configuration type 1a or DMRS configuration type 1c, assuming that the power on each subcarrier is E:

(1) When the number of CDM groups that do not send data is 2:

The power of DMRS on each RE can be expressed as:

Among them, n ₁ represents the number of DMRS ports (existing ports) that occupy 1/2 of the time-frequency resources in the DMRS configuration type, and n ₂ represents the DMRS ports that occupy 1/4 of the time-frequency resources in the DMRS configuration type. The number of (new ports).

Taking (b) of Figure 4 as an example, REs with subcarrier indexes 0, 1, 2, 4, 5, 6, 8, 9, and 10 can be used to carry DMRS, that is, subcarriers used to carry DMRS. The total power of the carrier is 9E. 2/3 of the 9E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/2, and 1/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/4. Therefore, DMRS is used in each The power P _DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, for DMRS ports supported by DMRS configuration type 1a or 1c, the corresponding power ratio β can be expressed as the following formula:

It can be seen from the above expression of the power ratio β that the power ratio of the currently scheduled DMRS port is related to the values of n ₁ and n ₂ . Therefore, the network device can determine each scheduled DMRS port according to the currently scheduled number of DMRS ports that occupy time-frequency resources with a density of 1/2 and/or a density of 1/4, that is, the values of n ₁ and n ₂ power ratio.

For example, the currently scheduled ports include DMRS port P0 and DMRS port P8, then when the number of CDM groups that do not send data in the DMRS configuration type 1a is 2, the power ratio of each scheduled DMRS port is -10* log10[3*(1+1)/(2*1+1)]=-3dB.

(2) When the number of CDM groups that do not send data is 3:

The power of DMRS on each RE can be expressed as:

Where _n1 represents the number of DMRS ports (existing ports) in the DMRS configuration type that occupy a density of 1/2 of the time-frequency resources, and _n2 represents the number of DMRS ports (new ports) in the DMRS configuration type that occupy a density of 1/4 of the time-frequency resources.

Taking (b) of Figure 4 as an example, REs with subcarrier indexes from 0 to 11 can be used to carry DMRS, that is, the total power of the subcarriers used to carry DMRS is 12E. 1/2 of the 12E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/2, and 1/2 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/4. Therefore, DMRS is used in each The power P _DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, for a DMRS port supported by DMRS configuration type 1a or 1c, the corresponding power ratio β can be expressed as follows:

The network device can determine the power ratio of each scheduled DMRS port to be -3dB based on the above formula.

Case 2: For DMRS configuration type 1b or DMRS configuration type 1d, assuming that the power on each subcarrier is E:

When the number of CDM groups that do not send data is k:

The power of DMRS on each RE can be expressed as:

Among them, n ₂ represents the number of DMRS ports (new ports) that occupy a time-frequency resource density of 1/4 in the DMRS configuration type.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, for DMRS ports supported by DMRS configuration type 1b or 1d, the corresponding power ratio β can be expressed as the following formula:

It can be seen from the above expression of the power ratio β that the power ratio of the currently scheduled DMRS port is related to the value of k. Therefore, the network device can determine the power ratio of each scheduled DMRS port based on the number k of CDM groups that do not send data in the current DMRS configuration type.

In summary, when the DMRS configuration type of the scheduled DMRS port is any one of the DMRS configuration types 1a to 1d, the first correspondence relationship may be as shown in Table 11.

Table 11

As shown in Figure 6 (b) to Figure 6 (d), the DMRS corresponding to the three new DMRS configuration types (for simplicity, they are recorded as DMRS configuration type 2a, DMRS configuration type 2b and DMRS configuration type 2c respectively) pattern.

Specifically, one CDM group from CDM group 0 to CDM group 2 in single-symbol DMRS configuration type 2 can be sparsely designed to obtain the DMRS configuration type 2a; CDM group 0 to CDM group 2 in single-symbol DMRS configuration type 2 can be sparsely designed. Any two CDM groups in CDM group 2 are sparsely designed to obtain the DMRS configuration type 2b; CDM group 0 to CDM group 2 in the single-symbol DMRS configuration type 2 are sparsely designed to obtain the DMRS configuration type 2c. Among them, the sparse design of CDM group can be referred to the description in Figure 4.

As shown in Figure 6(b), when the DMRS configuration type is DMRS configuration type 2a, the DMRS pattern supports up to 8 DMRS ports (P0 to P3, P12 to P15), and 8 DMRS ports correspond to 4 CDM groups (CDM group 0, CDM group 1, CDM group 3, CDM group 4). That is, the value of N, the total number of CDM groups mentioned above, is 4, and the value of M is 8. And the density of time-frequency resources occupied by DMRS of the DMRS port corresponding to CDM group0 or CDM group 1 is 1/3, and the density of time-frequency resources occupied by DMRS of the DMRS port corresponding to CDM group 3 or CDM group4 is 1/6.

In an example, a currently scheduled DMRS port (DMRS port #1) is used as an example to illustrate the first correspondence relationship corresponding to DMRS configuration type 2a. The DMRS port #1 may be any DMRS port supported by DMRS configuration type 2a.

In the case where the value of N is 4, the number of CDM groups that do not transmit data in the DMRS configuration type A may be 1, 2, 3 or 4. Corresponding to the same number of CDM groups that do not transmit data in the DMRS configuration type 2a, when DMRS port #1 is a DMRS port with different densities of occupied time and frequency resources, the power ratio is different.

Case 1: DMRS port #1 is P0, P1, P2 or P3

That is, DMRS port #1 is an existing port, or in other words, DMRS port #1 is a port that occupies 1/3 of the time-frequency resource density. For convenience of description, the following takes DMRS port #1 as P0 as an example. DMRS port #1 is P1, P2 or P3, which is similar to DMRS port #1 being P0.

When the number of CDM groups that do not send data in the DMRS configuration type 2a is 1, the RE corresponding to the CDM group 0 carries the DMRS reference signal, and the RE corresponding to the CDM group 1, CDM group 3 and CDM group 4 carry the DMRS port# 1 corresponding data (for example, PDSCH). At this time, the power ratio is 0.

When the number of CDM groups that do not send data in the DMRS configuration type 2a is 2, the RE corresponding to CDM group 0 carries DMRS reference signals, the RE corresponding to CDM group 1 does not carry signals, and the RE corresponding to CDM group 3 and CDM group 4 RE carries data corresponding to DMRS port #1. At this time, the power of the RE carrying DMRS can be increased to twice the original, that is, the power ratio is -10*log10(2), which is -3dB.

When the number of CDM groups that do not send data in the DMRS configuration type 2a is 3, the RE corresponding to CDM group 0 carries DMRS reference signals, and the REs corresponding to CDM group 1 and CDM group 3 do not need to carry signals. CDM group The RE corresponding to 4 carries the data corresponding to DMRS port #1. At this time, the power of the RE carrying DMRS can be increased to 2.5 times the original, that is, the power ratio is -10*log10(2.5), which is -3.98dB.

When the number of CDM groups that do not send data in the DMRS configuration type 2a is 4, the RE corresponding to CDM group 0 carries the DMRS reference signal, and the REs corresponding to CDM group 1, CDM group 3 and CDM group 4 do not need to carry the DMRS reference signal. Signal. At this time, the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB.

Case 2: DMRS port #1 is P12, P13, P14 or P15

That is, DMRS port #1 is a newly added port, or in other words, DMRS port #1 is a port that occupies a time-frequency resource density of 1/6. For convenience of description, the following takes DMRS port #1 as P12 as an example. The situation where DMRS port #1 is P13, P14 or P15 is similar to DMRS port #1 being P12.

When the number of CDM groups that do not transmit data in the DMRS configuration type 2a is 1, the power ratio is 0.

When the number of CDM groups that do not send data in the DMRS configuration type 2a is 2, the RE corresponding to the CDM group 3 carries the DMRS reference signal, and at least one RE among the REs corresponding to the CDM group 0, CDM group 1 and CDM group 4 It does not need to carry signals. At this time, the number of REs that can be borrowed is 1 times the number of REs corresponding to DMRS port 2, that is, the power ratio is -10*log10(2), which is -3dB.

When the number of CDM groups that do not send data in the DMRS configuration type 2a is 3, the RE corresponding to the CDM group 3 carries the DMRS reference signal, and at least two of the REs corresponding to the CDM group 0, CDM group 1 and CDM group 4 RE does not need to carry signals. At this time, the number of REs that can be borrowed is twice the number of REs corresponding to DMRS port #1, that is, the power ratio is -10*log10(3), which is -4.77dB.

When the number of CDM groups that do not send data in the DMRS configuration type 2a is 4, the RE corresponding to the CDM group 3 carries the DMRS reference signal, and at least 3 of the REs corresponding to the CDM group 0, CDM group 1 and CDM group 4 RE does not need to carry signals. At this time, the number of REs that can be borrowed is 4 times the number of REs corresponding to DMRS port #1, that is, the power ratio is -10*log10(4), which is -6dB.

In summary, when DMRS port #1 is a new port, the number of CDM groups that do not send data in DMRS configuration type 2a is N ₂ , and the corresponding power ratio is -10*log10(N ₂ ), N ₂ >1 .

In other words, when the currently scheduled DMRS port is a new port, for terminal equipment that supports the new port, the total number of the CDM group can be 6. When the number of CDM groups that do not transmit data in the DMRS configuration type 2a is N ₂ , the power of the RE carrying DMRS can be increased to the original N ₂ times, that is, the power ratio is -10*log10(N ₂ ), N ₂ >1.

As shown in (c) of Figure 6, when the DMRS configuration type is DMRS configuration type 2b, the DMRS pattern supports up to 10 DMRS ports (P0, P1, P12 to P19). 10 DMRS ports correspond to 5 CDM groups (CDM group 0, CDM group 3 to CDM group 6). That is, the value of N, the total number of CDM groups mentioned above, is 5, and the value of M is 10. Moreover, the density of the time-frequency resources occupied by the DMRS of the DMRS port corresponding to CDM group 0 is 1/3, and the density of the time-frequency resources occupied by the DMRS of the DMRS port corresponding to any one of CDM group 3 to CDM group 6 is 1/6 .

The following takes the currently scheduled DMRS port (DMRS port #1) as any one of the DMRS ports supported by DMRS configuration type 2b as an example to illustrate the first correspondence relationship corresponding to DMRS configuration type 2b.

In the case where the value of N is 5, the number of CDM groups that do not transmit data in the DMRS configuration type 2b may be any one from 1 to 5.

Scenario 1: DMRS port #1 is P0 or P1. The following description takes DMRS port #1 as P0 as an example.

When the number of CDM groups that do not transmit data in the DMRS configuration type 2b is 1, the power ratio is 0.

When the number of CDM groups that do not send data in the DMRS configuration type 2b is 2, the RE corresponding to the CDM group 0 carries the DMRS reference signal, and the RE corresponding to any CDM group among the CDM group 3 to CDM group 6 No signal is carried, and the RE corresponding to the other CDM groups carries the data corresponding to DMRS port #1. At this time, the power of each RE carrying DMRS is 1.5 times the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(1.5), which is -1.76dB.

Similarly, when the number of CDM groups that do not send data in the DMRS configuration type 2b is 3, the REs corresponding to any two CDM groups in the CDM group 3 to CDM group 6 do not carry signals. At this time, the power of each RE carrying DMRS is twice the power of each RE carrying PUSCH. That is, the power ratio is -10*log10(2), which is -3dB.

When the number of CDM groups that do not transmit data in DMRS configuration type 2b is 4, the power of each RE carrying DMRS is 2.5 times the power of each RE carrying PUSCH, that is, the power ratio is -10*log10(2.5 ), which is -3.98dB.

When the number of CDM groups that do not transmit data in DMRS configuration type 2b is 5, the power of each RE carrying DMRS is 3 times the power of each RE carrying PUSCH, that is, the power ratio is -10*log10(3 ), which is -4.77dB.

Case 2: DMRS port #1 is any one from P12 to P19

When the number of CDM groups that do not send data in the DMRS configuration type 2b is 1, the power ratio value is 0.

When the number of CDM groups that do not send data in the DMRS configuration type 2b is N ₂ , the power ratio is -10*log10(N ₂ ). Corresponding to N ₁ being 2, 3, 4 or 5, the power ratios are -3dB, -4.77dB, -6dB or -6.99dB respectively.

As shown in (d) of Figure 6, when the DMRS configuration type is DMRS configuration type 2c, the DMRS pattern supports up to 12 DMRS ports (P12 to P23), and the 12 DMRS ports correspond to 6 CDM groups (CDM group 3 to CDM group8). That is, the value of N, the total number of CDM groups mentioned above, is 6, and the value of M is 12.

Since the DMRS ports supported by DMRS configuration type 2c are all new ports, when the number of CDM groups that do not send data in DMRS configuration type 2c is N ₂ , the power of the RE carrying DMRS can be increased to N ₂ times. , that is, the power ratio is -10*log10(N ₂ ).

In the case where the value of N is 6, the value of N ₂ can be any one from 1 to 6.

When the value of N ₂ is 1, the power ratio is 0.

When the value of N ₂ is 2, 3, 4, 5 or 6, the power ratio is -3dB, -4.77dB, -6dB, -6.99dB or -7.78dB respectively.

As shown in Figure 7 (b) to Figure 7 (d), the DMRS patterns corresponding to the three new DMRS configuration types are respectively recorded as DMRS configuration type 2d, DMRS configuration type 2e and DMRS configuration type 2f.

Specifically, one CDM group from CDM group 0 to CDM group 2 in the dual-symbol DMRS configuration type 2 can be sparsely designed to obtain the DMRS configuration type 2d; CDM group 0 to CDM group 2 in the dual-symbol DMRS configuration type 2 can be obtained. Any two CDM groups in CDM group 2 are sparsely designed to obtain the DMRS configuration type 2e; CDM group 0 to CDM group 2 in the dual-symbol DMRS configuration type 2 are sparsely designed to obtain the DMRS configuration type 2f. Among them, the sparse design of CDM group can be referred to the description in Figure 4.

As shown in (b) of Figure 7, when the DMRS configuration type is DMRS configuration type 2d, the DMRS pattern supports up to 16 DMRS ports (P0-P3, P6-P8 and P12-P19). 16 DMRS ports correspond to 4 CDM groups (CDM group0, CDM group 1, CDM group 3 and CDM group 4). That is, the value of N above is 4, and the value of M is 16. For the density of time-frequency resources occupied by DMRS of the DMRS port corresponding to the CDM group, please refer to DMRS configuration type 2a.

Similarly, as shown in (c) of Figure 7 , when the DMRS configuration type is DMRS configuration type 2e, the DMRS pattern supports up to 20 DMRS ports. 20 DMRS ports correspond to 5 CDM groups. That is, the value of N, the total number of CDM groups mentioned above, is 5, and the value of M is 20.

As shown in (d) of Figure 7, when the DMRS configuration type is DMRS configuration type 2f, the DMRS pattern supports up to 24 DMRS ports. 24 DMRS ports correspond to 6 CDM groups. That is, the value of N, the total number of CDM groups mentioned above, is 6, and the value of M is 24.

When the DMRS configuration type is DMRS configuration type 2d to 2f, the number of CDM groups that do not transmit data may be any one from 1 to 6. The first corresponding relationship is similar to the case where the DMRS configuration type is DMRS configuration type 2a to 2c, and will not be described again.

In summary, when the scheduled DMRS port belongs to DMRS configuration type 2 or any one of DMRS configuration types 2a to 2f, the first corresponding relationship is as shown in Table 12.

Table 12

Further, when the scheduled DMRS port is a port supported by DMRS configuration type 2, DMRS configuration type 2a to DMRS configuration type 2f, it is assumed that DMRS configuration type 2, DMRS configuration type 2a to DMRS configuration type 2f are supported by other ports corresponding to All time and frequency resources are used to carry DMRS, or in other words, it is assumed that all other ports are occupied. In this case, the first correspondence relationship is as shown in Table 13.

Table 13

In this embodiment of the present application, in order to distinguish existing ports from new ports, the index of the new port can be set to be greater than or equal to "x". Among them, x can be the maximum index of the existing port plus n. For example, the value of n may be 1. For example, when the existing port is a port supported by DMRS configuration type 2, the value of x may be 12. Therefore, existing ports (ports supported by existing DMRS configuration type 2) and new ports can be distinguished through the relationship between the index of the DMRS port and "12". That is, the "antenna port" column may be indicated as a size relationship to "12". The value of n can also be greater than 1, which is not limited in this application.

It should be understood that "antenna port" may also indicate the index of a specific antenna port. For example, the "antenna port" column is indicated as "12, 13,...".

Optionally, the "antenna port" may also indicate the index of the time-frequency resource occupied by the DMRS (for example, the index of the subcarrier) or the density of the time-frequency resource occupied by the DMRS (for example, 1/2, 1/4 or 1/6 ).

In Table 13, when the scheduled DMRS port is a port supported by DMRS configuration type 2, DMRS configuration type 2a to DMRS configuration type 2f, and the number of CDM groups that do not send data is 1, there is no way to "borrow" power. RE, that is, the power of each RE carrying DMRS is the same as the power of each RE carrying PUSCH, and the power ratio is 0.

When the number of CDM groups that do not send data is 2, the scheduled DMRS port is the port supported by DMRS configuration type 2, and the REs corresponding to CDM group 0 and CDM group 1 in DMRS configuration type 2 carry DMRS reference signals. At this time, the scheduled DMRS port can be the port corresponding to CDM group 0 or CDM group 1. Therefore, the power of the RE carrying DMRS can be increased to twice the original, that is, the power ratio is -10*log10(2), which is -3dB.

When the number of CDM groups that do not send data is 3, the scheduled DMRS ports are ports supported by DMRS configuration type 2. The REs corresponding to CDM group 0 to CDM group 2 in DMRS configuration type 2 carry DMRS reference signals. At this time, the scheduled DMRS port can be the port corresponding to CDM group 0, CDM group 1 or CDM group 2. Therefore, the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB.

When the number of CDM groups that do not send data is 4, the scheduled DMRS port is a port supported by DMRS configuration type 2a or 2d, and the scheduled DMRS port can be an existing port or a new port. In the DMRS configuration type, CDM REs corresponding to group 0, CDMgroup 1, CDMgroup 3 and CDM group 4 carry DMRS reference signals. When the scheduled port is an existing port, the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB; when the scheduled port When the port is a new port, the power of the RE carrying DMRS can be increased to 6 times the original, that is, the power ratio is -10*log10(6), which is -7.78dB.

When the number of CDM groups that do not send data is 5, the scheduled DMRS port is a port supported by DMRS configuration type 2b or 2e, and the scheduled DMRS port can be an existing port or a new port. In the DMRS configuration type, CDM group 0, CDMgroup REs corresponding to CDM group 3 to 6 carry DMRS reference signals. When the scheduled port is an existing port, the power of the RE carrying DMRS can be increased to 3 times the original, that is, the power ratio is -10*log10(3), which is -4.77dB; when the scheduled port When the port is a new port, the power of the RE carrying DMRS can be increased to 6 times the original, that is, the power ratio is -10*log10(6), which is -7.78dB.

When the number of CDM groups that do not send data is 6, the scheduled DMRS ports are ports supported by DMRS configuration type 2c or 2f, and the scheduled DMRS ports are all new ports. In the DMRS configuration type, CDM group 3 to CDM The RE corresponding to group 8 carries the DMRS reference signal. When the scheduled port is a new port, the power of the RE carrying DMRS can be increased to 6 times the original, which is -7.78dB.

In another example, multiple currently scheduled DMRS ports are used as an example to illustrate the first correspondence relationship between DMRS configuration types 2a to 2f.

Case 1: For DMRS configuration type 2a or DMRS configuration type 2d, assume that the power on each subcarrier is E:

(1) When the number of CDM groups that do not send data is 3:

The power of DMRS on each RE can be expressed as:

Among them, n ₁ represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type. n ₂ represents the number of DMRS ports (new ports) occupying a time-frequency resource density of 1/6 in the DMRS configuration type.

Taking (b) of Figure 6 as an example, REs with subcarrier indexes 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 can be used to carry DMRS, that is, used to carry DMRS The total power of the subcarriers is 10E. 4/5 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/5 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each The power P _DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, for DMRS ports supported by DMRS configuration type 2a or 2d, the corresponding power ratio β can be expressed as the following formula:

It can be seen from the above expression of the power ratio β that the power ratio of the currently scheduled DMRS port is related to the values of n ₁ and n ₂ . Therefore, the network device can determine each scheduled DMRS port according to the currently scheduled number of DMRS ports that occupy time-frequency resources with a density of 1/3 and/or a density of 1/6, that is, the values of n ₁ and n ₂ power ratio.

For example, the currently scheduled ports include DMRS port P0 and DMRS port P12, then when the number of CDM groups that do not send data in the DMRS configuration type 2a is 3, the power ratio of each scheduled DMRS port is -10* log10[5*(1+1)/(4*1+1)]=-3dB.

(2) When the number of CDM groups that do not send data is 4:

The power of DMRS on each RE can be expressed as:

Taking (b) of Figure 6 as an example, that is, REs with subcarrier indexes from 0 to 11 can be used to carry DMRS, that is, the total power of the subcarriers used to carry DMRS is 12E. 2/3 of the 12E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is The power P _DMRS on each RE can be expressed as the above formula.

The power of data (eg, PDSCH) on each RE can be expressed as:

Therefore, for a DMRS port supported by DMRS configuration type 2a or DMRS configuration type 2d, the corresponding power ratio β can be expressed as follows:

The network device can determine the power ratio of each scheduled DMRS port according to the above formula.

Case 2: For DMRS configuration type 2b or DMRS configuration type 2e, assuming that the power on each subcarrier is E:

(1) When the number of CDM groups that do not send data is 2:

The power of DMRS on each RE can be expressed as:

Among them, n ₁ represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type. n ₂ represents the number of DMRS ports (new ports) that occupy 1/6 of the time-frequency resources in the DMRS configuration type.

Taking (c) of FIG. 6 as an example, REs with subcarrier indexes of 0, 1, 2, 6, 7, and 8 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 6E. 2/3 of the 9E are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/3, and 1/3 are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/6. Therefore, the power P _DMRS of DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, for DMRS ports supported by DMRS configuration type 2b or 2e, the corresponding power ratio β can be expressed as the following formula:

It can be seen from the above expression of the power ratio β that the power ratio of the currently scheduled DMRS port is related to the values of n ₁ and n ₂ . Therefore, the network device can determine each scheduled DMRS according to the number of currently scheduled DMRS ports that occupy time-frequency resources with a density of 1/3 and/or a density of 1/6, that is, the values of n ₁ and n ₂ Port power ratio.

For example, the currently scheduled ports include DMRS port P0 and DMRS port P16, then when the number of CDM groups that do not send data in the DMRS configuration type 2b is 2, the power ratio of each scheduled DMRS port is -10* log10[3*(1+1)/(2*1+1)]=-3dB.

(2) When the number of CDM groups that do not send data is 3:

The power of DMRS on each RE can be expressed as:

Taking (c) of Figure 6 as an example, REs with subcarrier indexes of 0, 1, 2, 3, 6, 7, 8, and 9 can be used to carry DMRS, that is, the subcarriers used to carry DMRS The total power is 8E. 1/2 of the 12E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/2 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is The power P _DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

(3) When the number of CDM groups that do not send data is 4:

The power of DMRS on each RE can be expressed as:

Taking (c) of Figure 6 as an example, REs with subcarrier indexes of 0, 1, 2, 3, 4, 6, 7, 8, 9, and 10 can be used to carry DMRS, that is, used to carry DMRS The total power of the subcarriers is 10E. 2/5 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 3/5 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each The power P _DMRS on each RE can be expressed as the above formula.

The power of data (eg, PDSCH) on each RE can be expressed as:

For example, the currently scheduled ports include DMRS port P0 and DMRS port P16, then when the number of CDM groups that do not send data in the DMRS configuration type 2b is 2, the power ratio of each scheduled DMRS port is -10log ₁₀ [5(1+1)/(2+3)]=-3dB.

(4) When the number of CDM groups that do not send data is 5:

The power of DMRS on each RE can be expressed as:

Wherein, _n1 represents the number of DMRS ports (existing ports) whose density of occupied time-frequency resources in the DMRS configuration type is 1/3, and _n2 represents the number of DMRS ports (newly added ports) whose density of occupied time-frequency resources in the DMRS configuration type is 1/6.

Taking (c) of Figure 6 as an example, REs with subcarrier indexes from 0 to 11 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 1/3 of the 12E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 2/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each The power P _DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, for DMRS ports supported by DMRS configuration type 2b or DMRS configuration type 2e, the corresponding power ratio β can be expressed as the following formula:

Case 3: For DMRS configuration type 2c or DMRS configuration type 2f, assuming that the power on each subcarrier is E:

When the number of CDM groups that do not send data is k:

The power of DMRS on each RE can be expressed as:

Among them, n ₂ represents the number of DMRS ports (new ports) that occupy a time-frequency resource density of 1/6 in the currently scheduled DMRS configuration type 2c or 2f.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, for DMRS ports supported by DMRS configuration type 2c or 2f, the corresponding power ratio β can be expressed as the following formula:

It can be seen from the above expression of the power ratio β that the power ratio of the currently scheduled DMRS port is related to the value of k. Therefore, the network device can determine each scheduled DMRS based on the number k of CDM groups that do not send data in the current DMRS configuration type. Port power ratio.

In summary, when the DMRS configuration type of the scheduled DMRS port is any one of the DMRS configuration types 2a to 2f, the first correspondence relationship may be as shown in Table 14.

Table 14

Among them, when the number of CDM groups that do not send data, n ₁ and n ₂ are determined, and the value of β is not the only value, the network device or terminal device can determine the value of β according to the DMRS configuration type. For example, when the number of CDM groups that do not send data is 4, n ₁ is 1 and n ₂ is 2, if the DMRS configuration type is 2a or 2d, the value of β is -3.52dB; if the DMRS configuration type If the type is 2b or 2e, the value of β is -0.27dB.

It should be noted that Table 14 is only an example of the first correspondence relationship. In an actual configuration, the first correspondence relationship may also be a sub-table of table 14 , that is, the first correspondence relationship may include some rows of table 14 .

In another example, for a new terminal device (Rel.18 terminal, or a terminal device that supports new ports), the current schedule Multiple DMRS ports are taken as an example to illustrate the first correspondence relationship between DMRS configuration types 2a to 2f.

Assume that the power on each subcarrier is E:

(1) When the number of CDM groups that do not send data is 3:

The power of DMRS on each RE can be expressed as:

Among them, n ₁ represents the number of DMRS ports (existing ports) that occupy 1/3 of the time-frequency resources in the DMRS configuration type, and n ₂ represents the DMRS ports that occupy 1/6 of the time-frequency resources in the DMRS configuration type. The number of (new ports).

Taking (c) of Figure 6 as an example, REs with subcarrier indexes 0, 1, 2, 6, 7, and 8 can be used to carry DMRS, that is, the total power of the subcarriers used to carry DMRS is 6E . 2/3 of the 6E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each The power P _DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, when the number of CDM groups that do not send data is 3, the power ratio β can be expressed as the following formula:

For example, the currently scheduled ports include DMRS port P0 and DMRS port P12, then when the number of CDM groups that do not send data is 3, the power ratio of each scheduled DMRS port is -10log ₁₀ [3(1+1 )/(2+1)]=-3.01dB.

(2) When the number of CDM groups that do not send data is 4:

The power of DMRS on each RE can be expressed as:

Taking (c) of Figure 6 as an example, REs with subcarrier indexes of 0, 1, 2, 3, 6, 7, 8, and 9 can be used to carry DMRS, that is, the subcarriers used to carry DMRS The total power is 8E. 1/2 of the 6E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 1/2 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, DMRS is used in each The power P _DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, when the number of CDM groups that do not send data is 4, the power ratio β can be expressed as the following formula:

(3) When the number of CDM groups that do not send data is 5:

In one case, the power of DMRS on each RE can be expressed as:

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, in this case, when the number of CDM groups that do not send data is 5, the power ratio β can be expressed as the following formula:

In another case, the power of DMRS on each RE can be expressed as:

Among them, _n1 represents the number of DMRS ports (existing ports) in the DMRS configuration type whose density of occupied time-frequency resources is 1/3, and _n2 represents the number of DMRS ports (newly added ports) in the DMRS configuration type whose density of occupied time-frequency resources is 1/6.

The power of data (e.g., PDSCH) on each RE can be expressed as:

(4) When the number of CDM groups that do not send data is 6:

In one case, the power of DMRS on each RE can be expressed as:

Taking (c) of Figure 6 as an example, REs with subcarrier indexes 0-11 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 1/3 of the 10E is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/3, and 2/3 is used to carry DMRS that occupies a DMRS port with a time-frequency resource density of 1/6. Therefore, the power P _DMRS of DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

In another case, the power of DMRS on each RE can be expressed as:

Taking (b) of FIG. 6 as an example, REs with subcarrier indexes of 0-11 can be used to carry DMRS, that is, the total power of subcarriers used to carry DMRS is 12E. 2/3 of the 12E are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/3, and 1/3 are used to carry DMRS of DMRS ports occupying a time-frequency resource density of 1/6. Therefore, the power P _DMRS of DMRS on each RE can be expressed as the above formula.

The power of data (e.g., PDSCH) on each RE can be expressed as:

Therefore, in this case, when the number of CDM groups that do not send data is 6, the power ratio β can be expressed as the following formula:

It can be seen from the above expression of the power ratio β that the power ratio of the currently scheduled DMRS port is related to the values of n ₁ and n ₂ . Therefore, the network device can determine the power ratio of each scheduled DMRS port based on the currently scheduled number of DMRS ports occupying 1/3 and/or 1/6 of the time-frequency resources, that is, the values of n ₁ and n ₂ .

In another example, for DMRS configuration type 1E (including DMRS configuration types 1a to 1d) and DMRS configuration type 2E (including DMRS configuration types 2a to 2f), the density of time-frequency resources occupied by DMRS ports corresponding to different CDM groups is the same. In the case of (for example, DMRS configuration type 1b, DMRS configuration type 2c), the first corresponding relationship may be as shown in Table 15.

Table 15

It should be understood that this application does not limit the DMRS patterns. The DMRS patterns shown in Figures 4 to 7 are only examples and should not constitute any limitation on this application.

In summary, when the DMRS ports currently supported by the protocol are expanded, the solution provided by the embodiment of the present application can flexibly indicate the power ratio of each DMRS port, thereby increasing the transmission power of the reference signal.

It can be seen from the above that when the DMRS configuration type corresponding to the scheduled DMRS port is any one of the configuration types in Figures 4 to 7, the network device can determine based on the first correspondence relationship shown in Tables 8 to 15 Power ratio of scheduled DMRS ports.

Among them, the number of the first CDM group is the "number of CDM groups that do not send data" shown in Table 8 to Table 15. There is a second corresponding relationship between the number of the first CDM group and the scheduled DMRS ports. Combined with the DMRS configuration types shown in Figures 4 to 7, the second corresponding relationship may be as shown in Tables 16 to 21.

Table 16 (Configuration type 1E (including DMRS configuration types 1a and 1b), maxLength=1)

Table 17 (Configuration type 1E (including DMRS configuration types 1a and 1b), maxLength=1)

Table 18 (Configuration Type 1E (including Configuration Type 1c and 1d), maxLength=2)

Table 19 (Configuration Type 2E (including Configuration Types 2a to 2c), maxLength=1)

Table 20 (Configuration type 2E (including configuration types 2a to 2c), maxLength=1)

Table 21 (Configuration type 2E (including configuration types 2d to 2f), maxLength=2)

In Table 16, when the DMRS port index value is 0 to 3, it indicates an existing port; when the DMRS port index value is 4 to 11, it indicates a new port; in Table 17, when the DMRS port index value is 0 to 3, it indicates an existing port. There are ports. When the DMRS port index value is 8 to 15, it indicates a new port. In Table 18, when the DMRS port index value is 0 to 7, it indicates an existing port. When the DMRS port index value is 8 to 23, it indicates a new port. Port; in Table 19, when the DMRS port index value is 0 to 5, it indicates an existing port; when the DMRS port index value is 6 to 17, it indicates a new port; in Table 20, when the DMRS port index value is 0 to 5, Indicates an existing port. When the DMRS port index value is 12 to 23, it indicates a new port. In Table 21, when the DMRS port index value is 0 to 11, it indicates an existing port. When the DMRS port index value is 12 to 35, it indicates New ports; It should be understood that the above Tables 16 to 21 are only examples and should not constitute any limitation on this application.

After the network device determines the power ratio of the scheduled DMRS port according to the first correspondence relationship shown in Table 8 to Table 15, the network device can also map the reference signal to the corresponding time-frequency resource according to the time-frequency resource mapping rule. (Refer to S320). The time-frequency resource mapping rules will be described in detail below in conjunction with the DMRS configuration types shown in Figures 4 to 7.

In a possible implementation, the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
c＝1,2

n＝0,1,...
l′=0,1

in, is the power scaling factor; w _f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w _t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′; c It represents the expansion capability coefficient. The specific value is as shown in any one of Table 22 to Table 25. r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.

In another possible implementation, the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
c＝1,2

n＝0,1,...
l′=0,1

in, is the power scaling factor; w _f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w _t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′; c It represents the expansion capability coefficient. The specific value is as shown in any one of Table 22 to Table 25. r(n) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.

Among them, in Table 22 to Table 25, p=1000+port index value. Table 22 corresponds to the pattern obtained by single-symbol extension of configuration type 1; Table 23 corresponds to the pattern obtained by double-sign extension of configuration type 1; Table 24 corresponds to the pattern obtained by single-sign extension of configuration type 2; Table 25 corresponds to the pattern obtained by single-sign extension of configuration type 2 Pattern obtained by configuring type 2 double sign extension.

Table 22

In Table 22, when the port index value is 0 to 3, the corresponding DMRS port is an existing port; when the port index value is 4 to 11, the corresponding DMRS port is a new port. This application does not limit the index value of the new DMRS port. For example, the port index value of the new port can also be 8 to 15. That is, the antenna port P index values 1004 to 1011 in Table 22 can be replaced with 1008 to 1015 in sequence.

Table 23

In Table 23, when the port index value is 0 to 7, the corresponding DMRS port is an existing port; when the port index value is 8 to 23, the corresponding DMRS port is a new port. This application does not limit the index value of the new DMRS port.

Table 24

In Table 24, when the port index value is 0 to 5, the corresponding DMRS port is an existing port, and when the port index value is 6 to 17, the corresponding DMRS port is a newly added port. This application does not limit the index value of the newly added DMRS port. For example, the port index value of the newly added port can also be 12 to 23. That is, the antenna port P index values 1006 to 1017 in Table 22 can be replaced with 1012 to 1023 in sequence.

Table 25

In Table 25, when the port index value is 0 to 11, the corresponding DMRS port is an existing port; when the port index value is 12 to 35, the corresponding DMRS port is a new port. This application does not limit the index value of the new DMRS port.

In another possible implementation, the reference signal port p corresponds to the reference signal sequence reference signal sequence Element mapped on the k-th subcarrier and l-th symbol Satisfy the following relationship:

k′=0,1
n＝0,1,...
l′=0,1

in, is the power scaling factor; w _f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w _t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′, specifically The values are as shown in Table 26 to Table 29; r(2n+k′) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.

in, is the power scaling factor; w _f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w _t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′, specifically The values are as shown in Table 26 to Table 29; r(n) is the element of the base sequence mapped on the k-th subcarrier and the l-th symbol.

Among them, Table 26 corresponds to the pattern obtained by single-symbol extension of configuration type 1; Table 27 corresponds to the pattern obtained by double-sign extension of configuration type 1; Table 28 corresponds to the pattern obtained by single-symbol extension of configuration type 2; Table 29 corresponds to Obtained from double sign extension of configuration type 2 pattern.

Table 26

In Table 26, when the port index value is 4 to 11, the corresponding DMRS port is a new port. This application does not limit the index value of the new DMRS port. For example, the port index value of the new port can also be 8 to 15. That is, the antenna port P index values 1004 to 1011 in Table 22 can be replaced with 1008 to 1015 in sequence.

Table 27

In Table 27, when the port index value is 8 to 23, the corresponding DMRS port is a new port. This application does not limit the index value of the new DMRS port.

Table 28

In Table 28, when the port index value is 6 to 17, the corresponding DMRS port is a new port. This application does not limit the index value of the new DMRS port. For example, the port index value of the new port can also be 12 to 23. That is, the antenna port P index values 1006 to 1017 in Table 28 can be replaced with 1012 to 1023 in sequence.

Table 29

In Table 29, when the port index value is 12 to 35, the corresponding DMRS port is a newly added port. This application does not limit the index value of the newly added DMRS port.

After mapping the DMRS to the corresponding time-frequency resource according to the above time-frequency resource mapping rules, the network device can send the DMRS to the terminal device. Further, the network device sends indication information to the terminal device (refer to S330), the indication information DMRS configuration type, and the scheduled DMRS port. The DMRS configuration type indicated by the network device may include any of the DMRS configuration types shown in Figures 4 to 7; the scheduled DMRS port indicated by the network device may be any row in Table 16 to Table 21. Therefore, the terminal device can receive DMRS based on the power ratio on the corresponding time-frequency resource according to the instruction information of the network device.

The above mainly introduces the scheme of sending reference signals in downlink communication, and the following briefly introduces the scheme of sending reference signals in uplink communication.

FIG. 8 is a schematic flowchart of another method 800 for sending and receiving reference signals provided by an embodiment of the present application. Each step in the method 800 is briefly described below, taking the reference signal as DMRS.

S810, the network device determines a scheduled DMRS port.

Specifically, the network device may determine the scheduled DMRS port according to the number of currently transmitted data streams. The scheduled DMRS port corresponds to a DMRS configuration type.

The scheduled DMRS port belongs to a DMRS port set (first port set), and the first port set includes M DMRS ports. In other words, the scheduled DMRS port is one or more of the M DMRS ports.

The M DMRS ports may be the most DMRS ports supported by the system. The M DMRS ports correspond to N CDM groups. For different DMRS configuration types, the values of M and N may be different. Specifically, the description of the first port set and the values of N and M may refer to S310.

S820: The network device sends instruction information to the terminal device. Correspondingly, the terminal device receives the indication information from the network device.

The indication information includes indication information (first indication information) used to indicate the DMRS configuration type, or in other words, the first indication information is used to indicate the configuration type of the currently scheduled DMRS. For example, the indication information may be sent through RRC.

The indication information also includes indication information (second indication information) used to indicate the scheduled DMRS port, or in other words, the second indication information is used to indicate the DMRS port configured by the network device. For example, the indication information may be sent through DCI.

S830: The terminal device determines the power ratio β according to the indication information.

The power ratio β is associated with the configuration type of the DMRS, the number of the first CDM group and the first parameter.

Specifically, the terminal device may determine the configuration type of the reference signal according to the indication information from the network device. The terminal device may determine the number of the first CDM group based on the currently scheduled DMRS port and the second corresponding relationship. The second correspondence includes a correspondence between the currently scheduled DMRS ports and the number of the first CDM group. For details, please refer to the description in S330. The terminal device may determine the power ratio β according to the DMRS configuration type, the first parameter, and the number of the first CDM group.

S840: The terminal device sends DMRS based on the power ratio β on the scheduled DMRS port.

Correspondingly, the network device receives the DMRS from the terminal device on the scheduled DMRS port.

Before the terminal device sends the DMRS to the network device, the terminal device may also determine the DMRS based on the power ratio β, and map the DMRS sequence to the corresponding time-frequency resources according to the time-frequency resource mapping rule.

The terminal device's determination of DMRS based on the power ratio is similar to the network device's determination of DMRS. For details, please refer to the description in S320.

It should be understood that the specific examples in the embodiments of the present application are only to help those skilled in the art better understand the embodiments of the present application, but are not intended to limit the scope of the embodiments of the present application.

It should also be understood that the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

It should also be understood that in the various embodiments of the present application, if there are no special instructions or logical conflicts, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments New embodiments can be formed based on their internal logical relationships.

The method for transmitting a reference signal provided by the embodiment of the present application is described in detail above with reference to FIGS. 2 to 8 . The following describes the communication device, network equipment and terminal equipment provided by the present application with reference to FIGS. 9 to 12 .

Figure 9 shows a schematic diagram of a communication device 900 provided by an embodiment of the present application.

The communication device 900 includes a transceiver unit 910 and a processing unit 920. The transceiver unit 910 can be used to implement corresponding communication functions. The transceiver unit 910 can also be called a communication interface or a communication unit. The processing unit 920 can be used to perform data processing.

Optionally, the communication device 900 also includes a storage unit, which can be used to store instructions and/or data, and the processing unit 920 can read the instructions and/or data in the storage unit, so that the device implements the aforementioned methods. The actions of the network device in the example.

In a possible design, the communication device 900 can implement the steps or processes executed by the network device in the above method embodiment. Among them, the transceiver unit 910 can be used to perform the operations related to the transceiver of the network device in the above method embodiment, such as the operations related to the transceiver of the network device in the embodiment shown in Figure 3 or Figure 8; the processing unit 920 can be used to perform the operations related to the processing of the network device in the above method embodiment, such as the operations related to the processing of the network device in the embodiment shown in Figure 3 or Figure 8.

In another possible design, the communication device 900 may be the terminal device in the aforementioned embodiment, or may be a component (such as a chip) of the terminal device. The communication device 900 can implement steps or processes corresponding to those executed by the terminal device in the above method embodiment. Among them, the transceiver unit 910 can be used to perform the transceiver-related operations of the terminal device in the above method embodiment, such as the transceiver-related operations of the terminal device in the embodiment shown in Figure 3 or Figure 8; the processing unit 920 can be used to perform the above method. The processing-related operations of the terminal device in the embodiment are the processing-related operations of the terminal device in the embodiment as shown in FIG. 3 or FIG. 8 .

Figure 10 is a schematic block diagram of a communication device 1000 provided by an embodiment of the present application. The apparatus 1000 includes a processor 1010 coupled to a memory 1030 . Optionally, a memory 1030 is also included for storing computer programs or instructions and/or data, and the processor 1010 is used to execute the computer programs or instructions stored in the memory 1030, or read the data stored in the memory 1030 to perform the above. Methods in Method Examples.

Optionally, there are one or more processors 1010 .

Optionally, there are one or more memories 1030 .

Optionally, the memory 1030 is integrated with the processor 1010, or is provided separately.

Optionally, as shown in Figure 10, the device 1000 further includes a transceiver 1020, which is used for receiving and/or transmitting signals. For example, the processor 1010 is used to control the transceiver 1020 to receive and/or transmit signals.

As a solution, the apparatus 1000 is used to implement the operations performed by the network device in each of the above method embodiments.

For example, the processor 1010 is used to execute the computer program or instructions stored in the memory 1030 to implement the relevant operations of the network device in the above various method embodiments. For example, the method executed by the network device in the embodiment shown in Figure 3 or Figure 8.

When the communication device 1000 is a network device, it is, for example, a base station. Figure 11 shows a simplified schematic structural diagram of a base station. The base station includes part 1110 and part 1120. Part 1112 is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals; part 1120 is mainly used for baseband processing and control of base stations. Part 1110 can usually be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. Part 1120 is usually the control center of the base station, which can generally be called a processing unit, and is used to control the base station to perform processing operations on the network device side in the above method embodiments.

The transceiver unit of part 1110 can also be called a transceiver or transceiver, etc., which includes an antenna and a radio frequency circuit, where the radio frequency circuit is mainly used for radio frequency processing. Optionally, the device used to implement the receiving function in part 1110 can be regarded as a receiving unit, and the device used to implement the sending function can be regarded as a sending unit, that is, part 1110 includes a receiving unit and a sending unit. The receiving unit may also be called a receiver, receiver, or receiving circuit, etc., and the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc.

Section 1120 may include one or more single boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processors at the same time. device.

For example, in one implementation, the transceiver unit of part 1110 is used to perform transceiver-related steps performed by the network device in the embodiment shown in Figures 3 to 8; part 1120 is used to perform the implementation shown in Figures 3 to 8 The processing-related steps performed by the network device in the example.

It should be understood that FIG11 is only an example and not a limitation, and the above-mentioned network device including the transceiver unit and the processing unit may not rely on the structure shown in FIG11.

When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input-output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.

As another solution, the communication device 1000 is used to implement the operations performed by the terminal device in each of the above method embodiments.

For example, the processor 1010 is used to execute the computer program or instructions stored in the memory 1030 to implement the relevant operations of the terminal device in the above various method embodiments. For example, the method executed by the terminal device in the embodiment shown in Figure 3 or Figure 8.

During the implementation process, each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor 1010 . The method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory 1030. The processor 1010 reads the information in the memory 1030 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

When the communication device 1100 is a terminal device, FIG. 12 shows a simplified structural schematic diagram of the terminal device. For ease of understanding and illustration, in Figure 12, the terminal device is a mobile phone as an example. As shown in Figure 12, the terminal equipment includes processor, memory, radio frequency circuits, antennas, and input and output devices. The processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, process data of software programs, etc. Memory is mainly used to store software programs and data. Radio frequency circuits are mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in FIG. 12. In an actual terminal device product, there may be one or more processors and one or more memories. Memory can also be called storage media or storage devices. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this application.

In the embodiment of the present application, the antenna and the radio frequency circuit with the transceiver function can be regarded as the transceiver unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device.

As shown in Figure 12, the terminal device includes a transceiver unit 1210 and a processing unit 1220. The transceiver unit 1210 may also be called a transceiver, a transceiver, a transceiver device, etc. The processing unit 1220 may also be called a processor, a processing board, a processing module, a processing device, etc.

Alternatively, the devices used to implement the receiving function in the transceiver unit 1210 can be regarded as a receiving unit, and the devices used in the transceiver unit 1210 used to implement the transmitting function can be regarded as a transmitting unit, that is, the transceiver unit 1210 includes a receiving unit and a transmitting unit. The transceiver unit may sometimes also be called a transceiver, transceiver, or transceiver circuit. The receiving unit may also be called a receiver, receiver, or receiving circuit. The sending unit may sometimes be called a transmitter, transmitter or transmitting circuit.

For example, in one implementation, the transceiver unit 1210 is configured to perform receiving operations of the terminal devices in FIGS. 3 to 8 . The processing unit 1220 is configured to perform processing actions on the terminal device side in FIGS. 3 to 8 .

It should be understood that FIG12 is merely an example and not a limitation, and the terminal device including the transceiver unit and the processing unit may not rely on the structure shown in FIG12 .

An embodiment of the present application also provides a network device, including: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, and when the programs or instructions are executed by the processor, the The network device performs the method for sending a reference signal as described in any one of the preceding items.

An embodiment of the present application also provides a network device, including a transceiver unit and a processing unit. The transceiver unit may be used to perform the steps of sending and receiving by the network device in the above method embodiment. The processing unit may be used to perform other steps of the network device in the above method embodiment except sending and receiving.

Embodiments of the present application also provide a computer-readable storage medium on which a computer program or instructions are stored. The characteristic is that when the computer program or instructions are executed, the computer performs the sending reference as described in any one of the preceding paragraphs. Signal.

An embodiment of the present application also provides a computer program product. The computer program product includes: computer program code. When the computer program code is run on a computer, it causes the computer to execute the method executed by the network device.

An embodiment of the present application also provides a computer program product. The computer program product includes: computer program code. When the computer program code is run on a computer, it causes the computer to execute the method executed by the terminal device.

An embodiment of the present application also provides a communication system, which includes the network device and terminal device in the above embodiment.

As an example, the communication system includes: the network device and the terminal device in the embodiment described above in conjunction with FIGS. 3 to 8 .

For explanations of relevant content and beneficial effects in any of the communication devices provided above, please refer to the corresponding method embodiments provided above, and will not be described again here.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the systems, devices and units described above are For the specific working process, reference may be made to the corresponding process in the foregoing method embodiments, which will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for sending a reference signal, comprising:

The network device determines the power ratio β;

The network device sends a reference signal to the terminal device based on the power ratio β;

Wherein, the power ratio β is associated with a first parameter, a configuration type of the reference signal and a number of first code division multiplexing CDM groups, and the first parameter is associated with a first time-frequency resource occupied by the reference signal. Relatedly, the first code division multiplexing CDM group is a CDM group that does not send data.
The method of claim 1, wherein the first parameter includes at least one of the following parameters:

The index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, the number of time-frequency resources occupied by the reference signal and the number of time-frequency resources occupied by the data corresponding to the reference signal ratio.
The method according to claim 1 or 2, characterized in that the reference signal is a first reference signal corresponding to a first port, the first port is a port in a first port set, and the first port The ports in the set correspond to N CDM groups, the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and the N is an integer greater than or equal to 3.
The method according to claim 3, characterized in that:

The N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or,

The N is 4, 5, or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.
The method according to claim 3 or 4, characterized in that the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port is the same as that of the second reference signal. The ratio of the number of time-frequency resources occupied by the data corresponding to the signal is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
The method according to any one of claims 3 to 5, characterized in that the first parameter further includes the value of N.
The method according to any one of claims 1 to 6, characterized in that the method further includes:

The network device sends indication information to the terminal device. The indication information includes first indication information and second indication information. The first indication information indicates the reference signal configuration type corresponding to the reference signal. The second indication information indicates the reference signal configuration type corresponding to the reference signal. The indication information indicates the index of the antenna port associated with the reference signal.
The method according to any one of claims 1 to 7, characterized in that the network device sends a reference signal to the terminal device based on the power ratio β, including:

The network device determines a power scaling factor according to the power ratio β

The network device based on the power scaling factor Send the reference signal to the terminal device;

Wherein, the power ratio β and the power scaling factor Satisfy the following relationship:
A method for receiving a reference signal, comprising:

The terminal equipment determines the power ratio β;

The terminal device receives a reference signal based on the power ratio β;

Wherein, the power ratio β is associated with a first parameter, a configuration type of the reference signal and a number of first code division multiplexing CDM groups, and the first parameter is associated with a first time-frequency resource occupied by the reference signal. Relatedly, the first code division multiplexing CDM group is a CDM group that does not send data.
The method of claim 9, wherein the first parameter includes at least one of the following parameters:

The index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, and the ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources occupied by data corresponding to the reference signal.
The method according to claim 9 or 10, characterized in that the reference signal is a first reference signal corresponding to a first port, the first port is a port in a first port set, and the first port The ports in the set correspond to N CDM groups, the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and the N is an integer greater than or equal to 3.
The method according to claim 11, characterized in that:

The N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or,

The N is 4, 5, or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.
The method according to claim 11 or 12 is characterized in that the first port set also includes a second port, and the ratio of the number of time-frequency resources occupied by the second reference signal of the second port to the number of time-frequency resources occupied by the data corresponding to the second reference signal is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
The method according to any one of claims 11 to 13, characterized in that the first parameter further includes the value of N.
The method according to any one of claims 9 to 14, characterized in that the method further includes:

The terminal device receives indication information from the network device, the indication information includes first indication information and second indication information, the first indication information indicates the reference signal configuration type corresponding to the reference signal, and the third indication information 2. The indication information indicates the index of the antenna port associated with the reference signal;

The terminal device determines the power ratio β, including:

The terminal device determines the power ratio β according to the reference signal configuration type corresponding to the reference signal and the index of the antenna port associated with the reference signal.
The method according to any one of claims 9 to 15, wherein the terminal device receives a reference signal based on the power ratio β, including:

The terminal device determines a power scaling factor according to the power ratio β

The terminal device based on the power scaling factor receiving the reference signal;

Wherein, the power ratio β and the power scaling factor Satisfy the following relationship:
A communication device, comprising a processing unit and a transceiver unit,

The processing unit is used to determine the power ratio β;

The transceiver unit is configured to send a reference signal to the terminal device based on the power ratio β;

Wherein, the power ratio β is associated with a first parameter, a configuration type of the reference signal and a number of first code division multiplexing CDM groups, and the first parameter is associated with a first time-frequency resource occupied by the reference signal. Relatedly, the first code division multiplexing CDM group is a CDM group that does not send data.
The device according to claim 17, wherein the first parameter includes at least one of the following parameters:

The index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, the number of time-frequency resources occupied by the reference signal and the number of time-frequency resources occupied by the data corresponding to the reference signal ratio.
The device according to claim 17 or 18 is characterized in that the reference signal is a first reference signal corresponding to a first port, the first port is a port in a first port set, the ports in the first port set correspond to N CDM groups, the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and N is an integer greater than or equal to 3.
The device according to claim 19, characterized in that:

The N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or,

The N is 4, 5, or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.
The device according to claim 19 or 20, wherein the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port is the same as that of the second reference signal. The ratio of the number of time-frequency resources occupied by the data corresponding to the signal is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
The device according to any one of claims 19 to 21, wherein the first parameter further includes the value of N.
The device according to any one of claims 17 to 22, characterized in that the transceiver unit is also used for:

Send indication information to the terminal device, the indication information including first indication information and second indication information, the first indication The information indicates the reference signal configuration type corresponding to the reference signal, and the second indication information indicates the index of the antenna port associated with the reference signal.
The device according to any one of claims 17 to 23, characterized in that:

The processing unit is specifically configured to determine a power scaling factor according to the power ratio β

The transceiver unit is specifically configured to based on the power scaling factor Send the reference signal to the terminal device;

Wherein, the power ratio β and the power scaling factor Satisfy the following relationship:
A communication device, characterized in that it includes a processing unit and a transceiver unit,

The processing unit is used to determine the power ratio β;

The transceiver unit is configured to receive a reference signal based on the power ratio β;

Wherein, the power ratio β is associated with a first parameter, a configuration type of the reference signal and a number of first code division multiplexing CDM groups, and the first parameter is associated with a first time-frequency resource occupied by the reference signal. Relatedly, the first code division multiplexing CDM group is a CDM group that does not send data.
The device according to claim 25, wherein the first parameter includes at least one of the following parameters:

The index of the antenna port associated with the reference signal, the index of the time-frequency resource occupied by the reference signal, the number of time-frequency resources occupied by the reference signal and the number of time-frequency resources occupied by the data corresponding to the reference signal ratio.
The device according to claim 25 or 26, characterized in that the reference signal is a first reference signal corresponding to a first port, the first port is a port in a first port set, and the first port The ports in the set correspond to N CDM groups, the time-frequency resources corresponding to each CDM group in the N CDM groups do not overlap, and the N is an integer greater than or equal to 3.
The device according to claim 27, characterized in that:

The N is 3 or 4, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/4, or,

The N is 4, 5, or 6, and the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by data corresponding to the first reference signal is 1/6.
The device according to claim 27 or 28, wherein the first port set further includes a second port, and the number of time-frequency resources occupied by the second reference signal of the second port is the same as that of the second reference signal. The ratio of the number of time-frequency resources occupied by the data corresponding to the signal is different from the ratio of the number of time-frequency resources occupied by the first reference signal to the number of time-frequency resources occupied by the data corresponding to the first reference signal.
The device according to any one of claims 27 to 29 is characterized in that the first parameter also includes the value of N.
The device according to any one of claims 25 to 30, characterized in that:

The transceiver unit is also configured to receive indication information from the network device. The indication information includes first indication information and second indication information. The first indication information indicates the reference signal configuration type corresponding to the reference signal. , the second indication information indicates the index of the antenna port associated with the reference signal;

The processing unit is specifically used for:

The power ratio β is determined according to a reference signal configuration type corresponding to the reference signal and an index of an antenna port associated with the reference signal.
The device according to any one of claims 9 to 15, characterized in that:

The processing unit is specifically configured to determine a power scaling factor according to the power ratio β

The transceiver unit is specifically configured to, based on the power scaling factor receiving the reference signal;

Wherein, the power ratio β and the power scaling factor Satisfy the following relationship:
A network device, characterized by including:

Comprising a unit or module for performing the method according to any one of claims 1 to 8.
A terminal device, characterized by including:

Comprising a unit or module for performing the method according to any one of claims 9 to 16.
A communication device, characterized by including:

A processor coupled to a memory for storing programs or instructions that when the programs or instructions are When the processor is executed, the device is caused to perform the method according to any one of claims 1 to 8, or to perform the method according to any one of claims 9 to 16.
A readable storage medium with computer programs or instructions stored thereon, characterized in that, when executed, the computer program or instructions cause the computer to perform the method described in any one of claims 1 to 8, or 9 to 16 method.