CN102377541B - Method, device and system for feeding back and receiving response information - Google Patents

Method, device and system for feeding back and receiving response information Download PDF

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CN102377541B
CN102377541B CN 201110049745 CN201110049745A CN102377541B CN 102377541 B CN102377541 B CN 102377541B CN 201110049745 CN201110049745 CN 201110049745 CN 201110049745 A CN201110049745 A CN 201110049745A CN 102377541 B CN102377541 B CN 102377541B
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ack
pusch
nak
nak feedback
feedback bits
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CN102377541A (en
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沈祖康
林亚男
潘学明
高雪娟
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Abstract

The invention discloses a method, device and system for feeding back and receiving response information, wherein UE (User Equipment) is used to perform ACK/NAK (Acknowledgement/Negative Acknowledgement) feedback by adopting a proper number of RE (Resource Element). In the method, an ACK/NAK feedback mechanism is formulated specific to multi-carrier aggregation in the LTE-A (Long Term Evolution-Advanced) system, the UE can determine the number of the RE required for performing the ACK/NAK feedback according to feedback resource parameters, so that the UE can adopt a proper number of the RE to transmit ACK/NAK feedback bit, thus, the accuracy of the ACK/NAK feedback bit is ensured, and data uploaded onto a PUSCH (Physical Uplink Shared Channel) cannot be influenced; correspondingly, a base station can also be used for acquiring the number of the RE occupied by the UE when the UE transmits the ACK/NAK feedback bit by adopting the same manner, therefore, the ACK/NAK feedback bit transmitted from the PUSCH to the UE can be accurately received; and thus, the system performance is effectively improved, and the service reliability of the system is promoted.

Description

Feedback of response information and receiving method, device and system thereof
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for feeding back response information and receiving the response information.
Background
In the 3GPP protocol, it is specified that, in the LTE system, for each Transport Block (TB) received, a terminal (UE) needs to feed back an acknowledgement message (i.e. ACK/NAK) to the base station to notify the base station whether the TB is correctly received, and in the LTE system, the ACK/NAK may be transmitted on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
For LTE employing Time Division Duplex (TDD) technology, the UE may transmit up to 4 ACK/NAKs. When a plurality of ACKs/NAKs are transmitted on the PUSCH, if the PUSCH is indicated by uplink scheduling (UL grant), the number of fed back ACKs/NAKs is notified by a Downlink Assignment Index (DAI) in the UL grant; if the PUSCH is not indicated by a UL grant, e.g., Semi-Persistent Scheduling (SPS), the number of ACK/NAK fed back is a fixed number of ACK/NAK feedback. The UL grant is transmitted in a Physical Downlink Control Channel (PDCCH). The Downlink Control Information (DCI) of the UL grant is DCI format 0.
The determined number of ACK/NAK feedbacks determines the number of Resource Elements (REs) occupied by the ACK/NAK when the ACK/NAK is transmitted on the PUSCH. In the 3GPP LTE system, one RE occupies 15kHz in the frequency domain. Specifically, the number of REs occupied by the transmission of ACK/NAK on PUSCH is given by the following formula:
Figure BDA0000048415270000021
wherein,
q' is the number of REs occupied by the transmission of the coded ACK/NAK on the PUSCH;
p is the feedback number of ACK/NAK before coding;
Figure BDA0000048415270000022
the number of REs occupied by the TB transmitted by the PUSCH during initial transmission;
Figure BDA0000048415270000023
for transmission of TB of PUSCH in initializationThe number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied during transmission;
the adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks when the PUSCH is initially transmitted;
Kris the size of the r Code Block;
c and KrChannel coding decision by initial transmission of TB transmitted on PUSCH;
Figure BDA0000048415270000025
the number of REs occupied by the TB for the PUSCH transmission in the current subframe.
In 3GPP TDD LTE, the maximum feedback number of ACK/NAK transmitted on the PUSCH is 4, and therefore, the UE may determine a corresponding value of P according to a value of DAT having a data length of 2 bits carried in the UL grant, thereby further determining the number of REs occupied by the fed-back ACK/NAK on the PUSCH according to the above formula.
In the 3GPP LTE-a system, since carrier aggregation is supported, the UE can receive TBs sent by the base station on multiple downlink carriers, and the TBs sent by each carrier require the UE to feed back corresponding ACK/NAK. Therefore, in the 3GPP LTE-a system, the number of ACKs/NAKs that the UE needs to feed back is greater than 4, and the relevant provisions of the 3GPP LTE system are no longer applicable to the 3GPP LTE-a system, i.e., the UE can no longer determine the number of REs occupied by the fed back ACKs/NAKs on the PUSCH by the 2-bit DAI carried in the UL grant. If an appropriate number of REs are not used to feed back ACK/NAK, the overall performance of the system is adversely affected. For example, if the set number of REs is too small, the accuracy of ACK/NAK feedback may be affected, and if the set number of REs is too large, the data transmission on PUSCH may be affected. Therefore, the feedback mechanism for ACK/NAK needs to be reformulated.
Disclosure of Invention
The embodiment of the invention provides a feedback method, a receiving method, a device and a system of response information, which are used for enabling a terminal to adopt proper RE number to perform ACK/NAK feedback.
The embodiment of the invention provides the following specific technical scheme:
a feedback method of acknowledgement information ACK/NAK comprises the following steps:
the UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or is an agreed preset parameter, or is a preset parameter configured by a high layer;
the UE determines feedback resource parameters
Figure BDA0000048415270000031
The above-mentioned
Figure BDA0000048415270000032
Is a positive number;
the UE according to the
Figure BDA0000048415270000033
Determining a number of REs occupied by the P ACK/NAK feedback bits when transmitted on a PUSCH;
the UE transmits the P ACK/NAK feedback bits on the PUSCH based on the number of REs.
A method of receiving acknowledgement information ACK/NAK, comprising:
the base station determines that the UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer;
the base station determines feedback resource parameters
Figure BDA0000048415270000034
The above-mentioned
Figure BDA0000048415270000035
Is a positive number;
the base station is according to
Figure BDA0000048415270000036
Determining a number of REs occupied by the P ACK/NAK feedback bits when transmitted on a PUSCH;
the base station receives the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the number of REs
A feedback apparatus of acknowledgement information ACK/NAK, comprising:
a generating unit, configured to generate P ACK/NAK feedback bits, where P is a natural number, and P is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a higher layer;
a first processing unit for determining a feedback resource parameter
Figure BDA0000048415270000041
The above-mentioned
Figure BDA0000048415270000042
Is a positive number;
a second processing unit for processing the data according to the
Figure BDA0000048415270000043
Determining a number of REs occupied by the P ACK/NAK feedback bits when transmitted on a PUSCH;
a communication unit to transmit the P ACK/NAK feedback bits on the PUSCH based on the number of REs.
An apparatus for receiving acknowledgement information ACK/NAK, comprising:
a determining unit, configured to determine that a terminal UE generates P ACK/NAK feedback bits, where P is a natural number and is a fixed preset parameter, or is an agreed preset parameter, or is a preset parameter configured by a higher layer;
a first processing unit for determining a feedback resource parameter
Figure BDA0000048415270000044
The above-mentioned
Figure BDA0000048415270000045
Is a positive number;
a second processing unit for processing the data according to the
Figure BDA0000048415270000046
Determining a number of REs occupied by the P ACK/NAK feedback bits when transmitted on a PUSCH;
a communication unit, configured to receive the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the number of REs.
An LTE-A system for feedback and reception of acknowledgement information ACK/NAK comprises a base station and a terminal UE, wherein,
the UE is used for generating P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer, and determining a feedback resource parameter
Figure BDA0000048415270000047
The above-mentioned
Figure BDA0000048415270000048
Is a positive number, and according to
Figure BDA0000048415270000049
Determining a number of REs occupied by the P ACK/NAK feedback bits when transmitted on PUSCHAnd transmitting the P ACK/NAK feedback bits on the PUSCH based on the number of REs;
the base station is used for determining that the UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer, and determining a feedback resource parameterThe above-mentionedIs a positive number, and according to
Figure BDA0000048415270000053
Determining the number of REs occupied by the P ACK/NAK feedback bits when transmitted on a PUSCH, and receiving the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the number of REs
In the embodiment of the invention, an ACK/NAK feedback mechanism is formulated aiming at multi-carrier aggregation in an LTE-A system, and UE (user equipment) can feed back resource parameters
Figure BDA0000048415270000054
To determine the number of REs needed for ACK/NAK feedback. Therefore, the UE can adopt the proper number of REs to send ACK/NAK feedback bits, the accuracy of the ACK/NAK feedback bits is guaranteed, the data transmitted on the PUSCH cannot be influenced, the performance of the system is effectively improved, and the service reliability of the system is improved. Correspondingly, the base station also knows the number of the occupied REs when the UE sends the ACK/NAK feedback bits in the same way, so that the ACK/NAK feedback bits sent by the UE can be accurately received on the PUSCH, and the service reliability of the system is further ensured.
Drawings
Fig. 1 to fig. 3 are schematic diagrams illustrating a parameter P value setting manner in an embodiment of the present invention;
FIG. 4 is an architecture diagram of an LTE-A system according to an embodiment of the present invention;
FIG. 5 is a functional block diagram of a UE according to an embodiment of the present invention;
FIG. 6 is a functional block diagram of a base station according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating the process of the UE sending ACK/NAK feedback bits according to an embodiment of the present invention;
fig. 8 and fig. 9 are schematic diagrams illustrating setting of P ACK/NAK feedback bits according to an embodiment of the present invention;
fig. 10 is a flow chart of the base station receiving ACK/NAK feedback bits sent by the UE in the embodiment of the present invention.
Detailed Description
In an LTE-a system, in order to enable a UE to perform ACK/NAK feedback by using an appropriate number of REs, in an embodiment of the present invention, when performing ACK/NAK feedback, a terminal (UE) generates ACK/NAK feedback bits, where P is a natural number, and P is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a higher layer; next, the UE determines a feedback resource parameter
Figure BDA0000048415270000061
TheIs positive number and is based on
Figure BDA0000048415270000063
Determining a number of Resource Elements (REs) occupied by the P ACK/NAK feedback bits when transmitted on a Physical Uplink Shared Channel (PUSCH), and transmitting the P ACK/NAK feedback bits on a PUSCH based on the number of REs. Correspondingly, on the network side, the base station determines that the UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameterOr the preset parameter is appointed or the preset parameter configured for the high layer; then, the base station determines a feedback resource parameterThe
Figure BDA0000048415270000065
Is a positive number; and according to
Figure BDA0000048415270000066
Determining the number of REs occupied by the P ACK/NAK feedback bits when transmitted on the PUSCH, and receiving the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the number of REs.
In the embodiment of the present invention, when the value of the parameter P is preset, the following three conditions are included, but not limited to:
setting the value of P as NxM, wherein N is the number of carriers aggregated by the UE, and M is the number of downlink subframes for the UE to perform ACK/NAK feedback in the same uplink subframe, wherein the UE receives at most one TB in each downlink subframe of each carrier; for example, referring to fig. 1, if the number N of carriers aggregated by the UE is 2, the number M of downlink subframes where the UE performs ACK/NAK feedback in the same uplink subframe is 4, and the UE receives a maximum of 1 TB in each downlink subframe of carrier 1 and carrier 2, then P is 2 × 4 is 8. In the example shown in fig. 1, the UE-side high layer generates one ACK/NAK information bit for each received TB, and the UE-side physical layer generates one ACK/NAK feedback bit in each carrier of each downlink subframe. On a certain downlink sub-frame carrier of the received TB, one ACK/NAK feedback bit of the physical layer corresponds to one ACK/NAK information bit of the high layer.
Setting the value of P as 2 XNxM, wherein N, M is a natural number, N is the number of carriers aggregated by the UE, M is the number of downlink subframes for the UE to perform ACK/NAK feedback in the same uplink subframe, and the UE receives 2 TBs at most in each downlink subframe of each carrier; for example, referring to fig. 2, if the number N of carriers aggregated by the UE is 2, the number M of downlink subframes where the UE performs ACK/NAK feedback in the same uplink subframe is 4, and the UE receives a maximum of 2 TBs in each downlink subframe of carrier 1 and carrier 2, then P is 2 × 2 × 4 is 16. In the example shown in fig. 2, the UE-side high layer generates one ACK/NAK information bit for each received TB, and the UE-side physical layer generates two ACK/NAK feedback bits in each carrier of each downlink subframe. On a certain downlink subframe carrier receiving TB, the two ACK/NAK feedback bits of the physical layer respectively correspond to the two ACK/NAK information bits of the high layer.
Setting the value of P as NxM, wherein N, M is a natural number, N is the number of carriers aggregated by UE, and M is the number of downlink subframes for the UE to perform ACK/NAK feedback in the same uplink subframe, wherein the UE receives at most 2 blocks of TB in each downlink subframe of each carrier; for example, referring to fig. 3, if the number N of carriers aggregated by the UE is 2, the number M of downlink subframes where the UE performs ACK/NAK feedback in the same uplink subframe is 4, and the UE receives a maximum of 2 TBs in each downlink subframe of carrier 1 and carrier 2, then P is 2 × 4 is 8. In the example shown in fig. 3, the UE-side high layer generates one ACK/NAK information bit for each received TB, and the UE-side physical layer generates one ACK/NAK feedback bit in each carrier of each downlink subframe. On a certain downlink sub-frame carrier of the received TB, one ACK/NAK feedback bit of the physical layer is obtained by two ACK/NAK information bits of the high layer through logic AND operation.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 4, 5 and 6, in the embodiment of the present invention, an LTE-a system includes a plurality of base stations and UEs, wherein,
the UE comprises a generating unit 50, a first processing unit 51, a second processing unit 52 and a communication unit 53, wherein,
a generating unit 50, configured to generate P ACK/NAK feedback bits, where P is a natural number and is a fixed preset parameter, or is an agreed preset parameter, or is a preset parameter configured by a higher layer;
first treatmentA unit 51 for determining
Figure BDA0000048415270000071
Is a positive number;
a second processing unit 52 for processing the data according to
Figure BDA0000048415270000072
Determining the number of occupied REs when the P ACK/NAK feedback bits are transmitted on a PUSCH;
a communication unit 53, configured to send the above P ACK/NAK feedback bits on PUSCH based on the obtained number of REs.
The base station comprises a determination unit 60, a first processing unit 61, a second processing unit 62 and a communication unit 63, wherein,
a determining unit 60, configured to determine that the terminal UE generates P ACK/NAK feedback bits, where P is a natural number and is a fixed preset parameter, or is an agreed preset parameter, or is a preset parameter configured by a higher layer;
a first processing unit 61 for determining
Figure BDA0000048415270000081
Is a positive number;
a second processing unit 62 for processing the data according toDetermining the number of occupied REs when the P ACK/NAK feedback bits are transmitted on a PUSCH;
a communication unit 63, configured to receive the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the obtained number of REs.
Based on the system architecture, referring to fig. 7, in the embodiment of the present invention, a detailed flow of sending ACK/NAK feedback bits to a base station by a UE is as follows:
step 700: the UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or is an agreed preset parameter, or is a preset parameter configured by a higher layer.
Step 710: UE determining feedback resource parametersIs a positive number.
Step 720: UE is based on
Figure BDA0000048415270000084
The number of REs occupied when the generated P ACK/NAK feedback bits are transmitted on the PUSCH is determined.
Step 730: the UE sends the generated P ACK/NAK feedback bits on the PUSCH based on the obtained number of REs.
In the above embodiment, when step 700 is executed, if the UE receives the TBs sent by the base station on only a part of carriers among the N carriers in the M downlink subframes, the number of ACK/NAK information bits fed back by the UE may be less than the maximum number of ACK/NAK feedback bits, and only ACK/NAK bit positions corresponding to carriers that do not receive the TBs in the M downlink subframes are needed to feed back NAKs, where the ACK/NAK information bits are bits that include ACK/NAK information fed back by the UE, that is, the ACK/NAK information bits may be either ACK or NAK, and depending on the reception condition of the TBs, the NAC bits fed back by the ACK/NAK bit positions corresponding to carriers that do not receive the TBs in the M downlink subframes are not regarded as ACK/NAK information bits, but only as ACK/NAK feedback bits. Thus, the UE generates P ACK/NAK feedback bits in the following manner:
the UE generates T ACK/NAK information bits based on the receiving state of the TB, wherein T is a natural number and is less than or equal to P; then, the UE maps the generated T ACK/NAK information bits to corresponding T bit positions in the P ACK/NAK feedback bits, and sets the ACK/NAK feedback bits which are not the T bit positions in the P ACK/NAK feedback bits as NAK.
For example, referring to fig. 8, the UE is configured to receive a TB from the base station on carrier 1 and carrier 2 in downlink subframe 1, downlink subframe 2, downlink subframe 3, and downlink subframe 4, and feed back a corresponding ACK/NAK. The maximum number of ACK/NAK feedback bits, P8, can be calculated and represented by the sequence P1, P2. Assuming that the UE receives a TB sent by the base station on carrier 1 of downlink subframe 1 and carrier 2 of downlink subframe, the UE sets ACK/NAK feedback bit P1 corresponding to carrier 1 of downlink subframe 1 as an ACK/NAK information bit, whose specific value is that ACK or NAK is determined by the reception condition of the TB, and correspondingly, the UE sets ACK/NAK feedback bit P4 corresponding to carrier 2 of downlink subframe 2 as an ACK/NAK information bit, whose specific value is that ACK or NAK is determined by the reception condition of the TB, that is, T is 2; and ACK/NAK feedback bits P2, P3, P5, P6, P7, P8 are all set to NAK.
For another example, referring to fig. 9, if the UE receives a TB transmitted by the base station on carrier 1 and carrier 2 in downlink subframe 1, downlink subframe 2, downlink subframe 3, and downlink subframe 4, the UE sets each ACK/NAK feedback bit (i.e., P1, P2.
As can be derived from the examples of fig. 8 and 9, the ACK/NAK information bits generated in the embodiment shown in fig. 8 are less than the ACK/NAK information bits generated in the embodiment shown in fig. 9, so when ACK/NAK feedback is performed, the number of REs occupied by the ACK/NAK feedback bits on the PUSCH in the embodiment shown in fig. 8 is less than the number of REs occupied by the ACK/NAK feedback bits on the PUSCH in the embodiment shown in fig. 9.
The main idea of the present invention is to control the number of REs occupied when ACK/NAK is transmitted on PUSCH by one or more bits in the UL grant sent in PDCCH.
In the above embodiment, when step 710 is performed, i.e., the UE is determining
Figure BDA0000048415270000101
Including, but not limited to, the following two cases,
in the first case, if the UE knows the transmission of the PUSCHIf the output is semi-persistent scheduling or non-adaptive retransmission, determining
Figure BDA0000048415270000102
Or, if the UE knows that the transmission of the PUSCH is semi-persistent scheduling or non-adaptive retransmission, it determines that
Figure BDA0000048415270000103
Determining if the UE knows that the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure BDA0000048415270000104
Wherein, M is the number of downlink subframes for ACK/NAK feedback in the PUSCH, and K is a positive number, and is configured by the base station or preset by the system, preferably, K is preset by the system and K is 4.
In the second case, the UE receives an uplink scheduling indicator (UL grant) through a Physical Downlink Control Channel (PDCCH), and selects a designated field corresponding to a value of the designated field in a designated set S according to the designated field carried in the UL grantWherein the so-called designated field comprises
Figure BDA0000048415270000106
And each bit, W is a natural number and is less than P.
Wherein the indication carried in the UL grant sent by the PDCCH
Figure BDA0000048415270000107
Is/are as follows
Figure BDA0000048415270000108
The bits, some bits in the existing UL grant in the LTE system (e.g. 2-bit DAI in TDD DCI format 0) can be reused, and additional bits can be used
Figure BDA0000048415270000109
Some existing bits may be partially used, and some bits additionally added may be partially used, which are not described herein again.
The specified set S may be a predetermined fixed set { β }1，β2，...，βW}; a set { β ] may also be determined by the UE among a plurality of preset sets according to higher layer signaling1，β2，...，βWAs the designated set S, the UE may also select, according to the value of P, one set { β ] corresponding to the value of P in a plurality of preset sets1，β2，....，βWAs the specified set S.
Figure BDA0000048415270000111
Can be a given set S { beta }1，β2，...，βWAny one of them.
For example, let W be 4, { β1，β2，...，β41, 2, 4, 8, and P8, in UL grant
Figure BDA0000048415270000112
A bit may indicateReferring to table 1 or table 2, four values of 2 bits in the UL grant are shown andthe mapping relationship between the values of (a) is as follows:
TABLE 1
Figure BDA0000048415270000115
TABLE 2
Figure BDA0000048415270000116
Of course, the mapping relationships described in table 1 and table 2 are only examples, and in practical applications, the mapping relationships may be adjusted according to different application environments, and will not be described again.
For another example, let W be 4, { β1，β2，...，β4Where 1, 4/3, 2, 4, and P is 8, then 2 bits in the UL grant may indicate that
Figure BDA0000048415270000117
If the base station side determines that the number of the ACK/NAK information bits required to be fed back by the UE is 7 or 8, the UE can be indicated by 2 bits
Figure BDA0000048415270000118
If the base station side determines that the number of ACK/NAK information bits required to be fed back by the UE is 5 or 6, the UE can be indicated by 2 bits
Figure BDA0000048415270000121
If the base station side determines that the number of ACK/NAK information bits required to be fed back by the UE is 3 or 4, then the UE can be indicated by 2 bitsIf the base station side determines that the number of ACK/NAK information bits required to be fed back by the UE is 1 or 2, the UE can be indicated by 2 bits
Figure BDA0000048415270000123
For another example, let W be 4, { β1，β2，...，β4Where 1, 4/3, 2, 4, and P is 8, then 2 bits in the UL grant may indicate that
Figure BDA0000048415270000124
If the base station side determines that the number of ACK/NAK information bits required to be fed back by the UE is 13-16, the UE can be indicated by 2 bits
Figure BDA0000048415270000125
If the base station side determines that the number of the ACK/NAK information bits required to be fed back by the UE is 9-12, the UE can be indicated by 2 bits
Figure BDA0000048415270000126
If the base station side determines that the number of ACK/NAK information bits required to be fed back by the UE is 5-8, the UE can be indicated by 2 bits
Figure BDA0000048415270000127
If the base station side determines that the number of ACK/NAK information bits required to be fed back by the UE is 1-4, the UE can be indicated by 2 bits
Of course, in practical applications, when W takes other values, for example, W is 8, W is 16, etc., as long as W < P, the corresponding values can be adopted by referring to the above manner
Figure BDA0000048415270000129
Bit indicates to UE
Figure BDA00000484152700001210
And will not be described in detail herein.
In the above embodiment, when step 720 is performed, i.e., the UE is based on
Figure BDA00000484152700001211
In determining the number of REs occupied by the generated P ACK/NAK feedback bits when transmitted on the PUSCH, the following equation one may be employed,
Figure BDA00000484152700001212
formula one
Q' is the number of REs occupied by ACK/NAK feedback bits when transmitted on the PUSCH;
p is the number of ACK/NAK feedback bits;
Figure BDA0000048415270000131
number of REs occupied at initial transmission for TB of the PUSCH transmission
Figure BDA0000048415270000132
The number of orthogonal frequency division multiplexing OFDM symbols occupied by the TB transmitted by the PUSCH during initial transmission
Figure BDA0000048415270000133
The adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks when the PUSCH is initially transmitted;
Kris the size of the r Code Block;
Figure BDA0000048415270000134
and the number of REs occupied by the TB transmitted by the PUSCH in the current subframe.
The above embodiments are all as follows
Figure BDA0000048415270000135
The following description will be given by way of example.
In the practical application of the method, the air conditioner,e.g., { beta ]1，β2，...，β4{1/8, 1/4, 1/2, 1}, the number of REs occupied by the UE to determine that P ACK/NAK feedback bits are transmitted on the PUSCH may be calculated using equation two:
Figure BDA0000048415270000137
formula two
Q' is the number of REs occupied by ACK/NAK feedback bits when transmitted on the PUSCH;
p is the number of ACK/NAK feedback bits;
Figure BDA0000048415270000138
number of REs occupied at initial transmission for TB of the PUSCH transmission
Figure BDA0000048415270000139
The number of orthogonal frequency division multiplexing OFDM symbols occupied by the TB transmitted by the PUSCH during initial transmission
Figure BDA00000484152700001310
The adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks when the PUSCH is initially transmitted;
Kris the size of the r Code Block;
Figure BDA0000048415270000141
and the number of REs occupied by the TB transmitted by the PUSCH in the current subframe.
In practical application, the number of REs occupied by the UE when determining that P ACK/NAK feedback bits are transmitted on the PUSCH can also be calculated by adopting formula three:
Figure BDA0000048415270000142
formula three
Q' is the number of REs occupied by ACK/NAK feedback bits when transmitted on the PUSCH;
Figure BDA0000048415270000143
p is the number of ACK/NAK feedback bits, P is M (C)DL+CMIMO) Where CDL is the number of aggregated downlink carriers, CMIMOConfiguring the number of downlink carriers transmitted by using an MIMO mode, wherein M is the number of downlink subframes for performing ACK/NACK feedback in the PUSCH correspondingly;
when the PUSCH transmission is dynamically scheduled, then
Figure BDA0000048415270000144
Figure BDA0000048415270000145
Figure BDA0000048415270000146
Appropriately configured by the base station;
when the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission,
Figure BDA0000048415270000147
Figure BDA0000048415270000148
Figure BDA0000048415270000149
or,
Figure BDA00000484152700001410
O＝min(M，K)·(CDL+CMIMO) Or is or
Figure BDA00000484152700001411
O＝max(K，min(M，K))·(CDL+CMIMO)；
Figure BDA00000484152700001412
Number of REs occupied at initial transmission for TBs of PUSCH transmission
Figure BDA00000484152700001413
OFDM symbol number occupied by TB for PUSCH transmission at initial transmission
Figure BDA00000484152700001414
The adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks during the initial transmission of the PUSCH;
Kris the size of the r Code Block;
Figure BDA00000484152700001415
and the number of REs occupied by the TB transmitted by the PUSCH in the current subframe.
In this embodiment, a single-antenna UE is mainly taken as an example to illustrate the number of occupied REs when ACK/NAK feedback bits are sent on a PUSCH under 3GPP LTE-a carrier aggregation, and the method provided in this embodiment is also applicable to a multi-antenna UE.
The ACK/NAK feedback bits of the present invention may be either ACKs or NAKs, so each ACK/NAK feedback bit represents two states. In other embodiments, the ACK/NAK feedback bits may represent ACK, NAK, or DTX. The DTX means that the UE does not receive any TB on the corresponding downlink subframe carrier. If the ACK/NAK feedback bits may represent DTX, the DTX may also be referred to as explicit DTX. The ACK/NAK bits described in the embodiments of the present invention do not include displayed DTX bits, but the method described in the embodiments of the present invention may be directly extended to include the case of displaying DTX bits.
Based on the above embodiment, referring to fig. 10, a detailed flow of receiving ACK/NAK feedback bits sent by the UE by the base station in the embodiment of the present invention is as follows:
step 1000: and the base station determines that the UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer.
Step 1010: base station determining feedback resource parameter
Figure BDA0000048415270000151
Is a positive number.
The base station determines in the same manner as step 710Including but not limited to the following two cases:
in the first case, it is determined if the base station knows that the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure BDA0000048415270000153
Or, if the base station knows that the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission, the base station determines
Figure BDA0000048415270000154
Or, if the base station knows that the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission,determining
Figure BDA0000048415270000155
Wherein, M is the number of downlink subframes for ACK/NAK feedback in the PUSCH, and K is a positive number, and is configured by the base station or preset by the system, preferably, K is preset by the system and K is 4.
In the second case, the base station determines the UL grant sent on the PDCCH, and selects a value corresponding to the value of the designated field in the designated set S according to the designated field carried in the UL grant
Figure BDA0000048415270000161
Wherein the specified field comprises
Figure BDA0000048415270000162
And each bit, W is a natural number and is less than P.
Wherein the UL grant carries an indication
Figure BDA0000048415270000163
Is/are as follows
Figure BDA0000048415270000164
The bits can be reused for some bits in the existing UL grant in the LTE system (e.g. 2-bit DAI in TDD DCI format 0), and additional bits can be used
Figure BDA0000048415270000165
Some existing bits may be partially used, and some bits additionally added may be partially used, which are not described herein again.
The specified set S may be a predetermined fixed set { β }1，β2，...，βW}; a set { β ] may also be determined by the UE among a plurality of preset sets according to higher layer signaling1，β2，...，βWThe UE can also take the value corresponding to the value of P in a plurality of preset sets according to the value of P as the designated set SA set of { beta }1，β2，...，βWAs the specified set S.Can be a given set S { beta }1，β2，...，βWThe specific setting manner of any one of the above is the same as the execution manner of step 710, and is not described herein again.
On the other hand, if the base station transmits a plurality of UL grants to the UE in one downlink subframe, the base station selects in the designated set S according to the designated fields carried in the plurality of transmitted UL grants
Figure BDA0000048415270000167
The values of (a) are the same.
Step 1020: the base station is based on
Figure BDA0000048415270000168
The number of REs occupied when P ACK/NAK feedback bits are transmitted on the PUSCH is determined.
In the embodiment of the present invention, when the base station determines the number of the REs, the formula one, the formula two, or the formula three may also be adopted, which is not described herein again.
Step 1030: the base station receives P ACK/NAK feedback bits sent by the UE on the PUSCH based on the obtained number of REs.
In summary, in the embodiment of the present invention, for multi-carrier aggregation in the LTE-a system, a feedback mechanism of ACK/NAK is formulated, that is, the feedback mechanism includes the UL grant
Figure BDA0000048415270000169
The designated field of one bit informs the UE of the number of REs needed to upload the P ACK/NAK feedback bits so that the UE can be informed of the number of REs needed to upload the P ACK/NAK feedback bits according to
Figure BDA0000048415270000171
Bit-by-bit inverseFeed resource parameter
Figure BDA0000048415270000172
And determining the corresponding RE number, so that the ACK/NAK feedback bits are sent by adopting the proper RE number, the accuracy of the ACK/NAK feedback bits is ensured, the data transmitted on the PUSCH is not influenced, the performance of the system is effectively improved, and the service reliability of the system is improved. Correspondingly, the base station also knows the number of the occupied REs when the UE sends the ACK/NAK feedback bits in the same way, so that the ACK/NAK feedback bits sent by the UE can be accurately received on the PUSCH, and the service reliability of the system is further ensured.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (31)

1. A feedback method for acknowledgement information ACK/NAK, comprising:
the terminal UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer;
the UE determines feedback resource parameters
Figure FDA0000048415260000011
The above-mentionedIs a positive number;
the UE according to the
Figure FDA0000048415260000013
Determining the number of Resource Elements (REs) occupied by the P ACK/NAK feedback bits when the P ACK/NAK feedback bits are transmitted on a Physical Uplink Shared Channel (PUSCH);
the UE transmits the P ACK/NAK feedback bits on the PUSCH based on the number of REs.
2. The method of claim 1, wherein presetting the value of P comprises:
setting the value of P as NxM, wherein N is the number of carriers aggregated by UE, and M is the number of downlink subframes for the UE to perform ACK/NAK feedback in the same uplink subframe, wherein the UE receives at most one transmission block TB in each downlink subframe of each carrier; or
Setting the value of P to be 2 multiplied by N multiplied by M, wherein N is the carrier number aggregated by the UE, and M is the downlink subframe number of the UE performing ACK/NAK feedback on the same uplink subframe, wherein the UE receives at most 2 transmission blocks TB in each downlink subframe of each carrier; or
Setting the value of P as NxM, wherein N is the number of carriers aggregated by the UE, and M is the number of downlink subframes for the UE to perform ACK/NAK feedback in the same uplink subframe, wherein the UE receives at most 2 transport blocks TB in each downlink subframe of each carrier.
3. The method of claim 1, wherein the UE determines a feedback resource parameter
Figure FDA0000048415260000014
The method comprises the following steps:
determining, by the UE, that the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000015
Or,
the UE determines that the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000021
Or,
determining, by the UE, that the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000022
And M is the number of downlink subframes for performing ACK/NAK feedback in the PUSCH, and K is a positive number and is configured by a base station or preset by a system.
4. The method of claim 1, wherein the UE determines a feedback resource parameterThe method comprises the following steps:
the UE receives an uplink scheduling indication (UL grant) through a Physical Downlink Control Channel (PDCCH);
the UE selects a value corresponding to the designated field from a designated set S according to the designated field carried in the UL grant
Figure RE-FDA0000363425820000014
Wherein the specified field comprises
Figure RE-FDA0000363425820000015
And each bit, W is a natural number and is less than P.
5. The method of claim 4, wherein the specified set S is a preset fixed set.
6. The method of claim 4, wherein the specified set S is determined by any one of:
the UE determines a set from a plurality of preset sets as the designated set S according to a high-level signaling;
and the UE takes one set corresponding to the value of the P as the designated set S in a plurality of preset sets according to the value of the P.
7. The method of claim 4, wherein the UE generates P ACK/NAK feedback bits comprising:
the UE generates T ACK/NAK information bits based on the receiving state of a transmission block TB, wherein T is a natural number and is less than or equal to P;
the UE maps the T ACK/NAK information bits to corresponding T bit positions in P ACK/NAK feedback bits;
and the UE sets ACK/NAK feedback bits which are not the T bit positions in the P ACK/NAK feedback bits as NAK.
8. The method of any of claims 1-7, wherein the UE is based on the informationDetermining the number of Resource Elements (REs) occupied by the P ACK/NAK feedback bits when transmitted on the PUSCH comprises:
using a formula
Figure FDA0000048415260000032
Determining the number of REs, wherein,
q' is the number of REs occupied by ACK/NAK feedback bits when transmitted on the PUSCH;
p is the number of ACK/NAK feedback bits;
Figure FDA0000048415260000033
the number of REs occupied by the TBs transmitted on the PUSCH during initial transmission;
Figure FDA0000048415260000034
the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the TB transmitted by the PUSCH during initial transmission;
Figure FDA0000048415260000035
the adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks when the PUSCH is initially transmitted;
Kris the size of the r Code Block;
Figure FDA0000048415260000036
and the number of REs occupied by the TB transmitted by the PUSCH in the current subframe.
9. A method for receiving acknowledgement information ACK/NAK, comprising:
the base station determines that the terminal UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer;
the base station determines feedback resource parameters
Figure FDA0000048415260000037
The above-mentioned
Figure FDA0000048415260000038
Is a positive number;
the base station is according to
Figure FDA0000048415260000039
Determining the number of Resource Elements (REs) occupied by the P ACK/NAK feedback bits when the P ACK/NAK feedback bits are transmitted on a Physical Uplink Shared Channel (PUSCH);
the base station receives the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the number of REs.
10. The method of claim 9, wherein presetting the value of P comprises:
setting the value of P as NxM, wherein N is the number of carriers aggregated by UE, and M is the number of downlink subframes for the UE to perform ACK/NAK feedback in the same uplink subframe, wherein the UE receives at most one transmission block TB in each downlink subframe of each carrier; or
Setting the value of P to be 2 multiplied by N multiplied by M, wherein N is the carrier number aggregated by the UE, and M is the downlink subframe number of the UE performing ACK/NAK feedback on the same uplink subframe, wherein the UE receives at most 2 transmission blocks TB in each downlink subframe of each carrier; or
Setting the value of P as NxM, wherein N is the number of carriers aggregated by the UE, and M is the number of downlink subframes for the UE to perform ACK/NAK feedback in the same uplink subframe, wherein the UE receives at most 2 transport blocks TB in each downlink subframe of each carrier.
11. The method of claim 9, wherein the base station determines parameters
Figure FDA0000048415260000041
The method comprises the following steps:
the base station determines whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000042
Or,
the base station determines whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmissionOr
The base station determines whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000044
Wherein, M is the number of downlink subframes for ACK/NAK feedback in the PUSCH, and K is a positive number, and is configured or preset by the base station.
12. The method of claim 9, wherein the base station determines a feedback resource parameter
Figure FDA0000048415260000045
The method comprises the following steps:
the base station determines an uplink scheduling indication (UL grant) sent on a Physical Downlink Control Channel (PDCCH);
the base station selects a value corresponding to the designated field in a designated set S according to the designated field carried in the UL grant
Figure FDA0000048415260000051
Wherein the specified field comprises
Figure FDA0000048415260000052
And each bit, W is a natural number and is less than P.
13. The method of claim 12, wherein the base station selects a value corresponding to a designated field in a designated set S according to the designated field carried in the UL grant
Figure FDA0000048415260000053
The method comprises the following steps:
if the base station is in a downlink sub-stationSending a plurality of UL grants to the UE in a frame, and then the base station selects in the designated set S according to designated fields carried in the plurality of UL grants
Figure FDA0000048415260000054
The values of (a) are the same.
14. The method of claim 12, wherein the set S is a preset fixed set.
15. The method of claim 12, wherein the set S is determined by any one of:
the base station determines a set from a plurality of preset sets as the designated set S according to a high-level signaling;
and the base station takes one set corresponding to the value of the P as the designated set S in a plurality of preset sets according to the value of the P.
16. The method of any of claims 9-15, wherein the base station is based on the signal received from the base station
Figure FDA0000048415260000055
Determining the number of REs occupied by the P ACK/NAK feedback bits when transmitted on PUSCH comprises:
using a formula
Figure FDA0000048415260000056
Determining the number of REs, wherein,
q' is the number of REs occupied by ACK/NAK feedback bits when transmitted on the PUSCH;
p is the number of ACK/NAK feedback bits;
Figure FDA0000048415260000061
number of REs occupied at initial transmission for TB of the PUSCH transmission
Figure FDA0000048415260000062
The number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the TB transmitted by the PUSCH during initial transmission;
Figure FDA0000048415260000063
the adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks when the PUSCH is initially transmitted;
Kris the size of the r Code Block;
Figure FDA0000048415260000064
and the number of REs occupied by the TB transmitted by the PUSCH in the current subframe.
17. An apparatus for feeding back acknowledgement information ACK/NAK, comprising:
a generating unit, configured to generate P ACK/NAK feedback bits, where P is a natural number, and P is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a higher layer;
a first processing unit for determining a feedback resource parameterThe above-mentioned
Figure FDA0000048415260000066
Is a positive number;
a second processing unit for processing the data according to the
Figure FDA0000048415260000067
Determining the number of Resource Elements (REs) occupied by the P ACK/NAK feedback bits when the P ACK/NAK feedback bits are transmitted on a Physical Uplink Shared Channel (PUSCH);
a communication unit to transmit the P ACK/NAK feedback bits on the PUSCH based on the number of REs.
18. The apparatus of claim 17, wherein the first processing unit determines a feedback resource parameter
Figure FDA0000048415260000068
The method comprises the following steps:
determining whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000069
Figure FDA00000484152600000610
Or,
determining whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000071
Or
Determining whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
And M is the number of downlink subframes for performing ACK/NAK feedback in the PUSCH, and K is a positive number and is configured by a base station or preset by a system.
19. The apparatus of claim 17, wherein the first processing unit determines a feedback resource parameter
Figure FDA0000048415260000073
The method comprises the following steps:
receiving an uplink scheduling indication (UL grant) through a Physical Downlink Control Channel (PDCCH);
selecting a value corresponding to the value of the designated field in a designated set S according to the designated field carried in the UL grant
Figure FDA0000048415260000074
Wherein the specified field comprises
Figure FDA0000048415260000075
And each bit, W is a natural number and is less than P.
20. The apparatus of claim 19, wherein the first processing unit determines the designated set S according to a preset fixed set.
21. The apparatus of claim 19, wherein the first processing unit determines one set among a plurality of preset sets as the designated set S according to higher layer signaling; or, according to the value of P, one set corresponding to the value of P is taken as the designated set S in a plurality of preset sets.
22. The apparatus as claimed in claim 19, wherein said generating unit when generating P ACK/NAK feedback bits comprises:
generating T ACK/NAK information bits based on the receiving state of the transmission block TB, wherein T is a natural number and is less than or equal to P;
mapping the T ACK/NAK information bits to corresponding T bit positions in P ACK/NAK feedback bits;
setting ACK/NAK feedback bits of the P ACK/NAK feedback bits that are not the T bit positions as NAKs.
23. The apparatus according to any of claims 17-22, wherein said second processing unit is based on said
Figure FDA0000048415260000081
Determining the number of Resource Elements (REs) occupied by the P ACK/NAK feedback bits when transmitted on the PUSCH comprises:
using a formulaDetermining the number of REs, wherein,
q' is the number of REs occupied by ACK/NAK feedback bits when transmitted on the PUSCH;
p is the number of ACK/NAK feedback bits;
Figure FDA0000048415260000083
number of REs occupied at initial transmission for TB of the PUSCH transmission
Figure FDA0000048415260000084
The number of orthogonal frequency division multiplexing OFDM symbols occupied by the TB transmitted by the PUSCH during initial transmission
Figure FDA0000048415260000085
The adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks when the PUSCH is initially transmitted;
Kris the size of the r Code Block;
and the number of REs occupied by the TB transmitted by the PUSCH in the current subframe.
24. An apparatus for receiving acknowledgement information ACK/NAK, comprising:
a determining unit, configured to determine that a terminal UE generates P ACK/NAK feedback bits, where P is a natural number and is a fixed preset parameter, or is an agreed preset parameter, or is a preset parameter configured by a higher layer;
a first processing unit for determining a feedback resource parameter
Figure FDA0000048415260000087
The above-mentioned
Figure FDA0000048415260000088
Is a positive number;
a second processing unit for processing the data according to the
Figure FDA0000048415260000089
Determining the number of Resource Elements (REs) occupied by the P ACK/NAK feedback bits when the P ACK/NAK feedback bits are transmitted on a Physical Uplink Shared Channel (PUSCH);
a communication unit for receiving the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the number of REs.
25. The apparatus of claim 24, wherein the first processing unit determines a parameter
Figure FDA0000048415260000091
The method comprises the following steps:
determining whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
Figure FDA0000048415260000093
Or,
learning that the PUSCH transmission is semi-persistent schedulingDetermining when the degree is not self-adaptive retransmission
Figure FDA0000048415260000094
Or
Determining whether the PUSCH transmission is semi-persistent scheduling or non-adaptive retransmission
And M is the number of downlink subframes for performing ACK/NAK feedback in the PUSCH, and K is a positive number and is configured by a base station or preset by a system.
26. The apparatus of claim 24, wherein the first processing unit determines a feedback resource parameter
Figure FDA0000048415260000096
The method comprises the following steps:
determining an uplink scheduling indication (UL grant) sent on a Physical Downlink Control Channel (PDCCH);
selecting a value corresponding to the value of the designated field in a designated set S according to the designated field carried in the UL grant
Figure FDA0000048415260000097
Wherein the specified field comprises
Figure FDA0000048415260000098
And each bit, W is a natural number and is less than P.
27. The apparatus of claim 26, wherein the first processing unit selects a value corresponding to a specified field in a specified set S according to the specified field carried in the UL grant
Figure FDA0000048415260000099
The method comprises the following steps:
if the communication unit sends multiple UL grants to the UE in one downlink subframe, the first processing unit selects, in the designated set S, the UL grants according to indication fields carried in the multiple UL grants
Figure FDA00000484152600000910
The values of (a) are the same.
28. The apparatus of claim 24, wherein the first processing unit determines the designated set S according to a preset fixed set.
29. The apparatus of claim 24, wherein the first processing unit determines one set among a plurality of preset sets as a designated set S according to higher layer signaling; or according to the value of P, taking a set corresponding to the value of P as a designated set S in a plurality of preset sets.
30. The apparatus according to any of claims 24-29, wherein said second processing unit is based on said
Figure FDA0000048415260000101
Determining the number of REs occupied by the P ACK/NAK feedback bits when transmitted on PUSCH comprises:
using a formula
Figure FDA0000048415260000102
Determining the number of REs, wherein,
q' is the number of REs occupied by ACK/NAK feedback bits when transmitted on the PUSCH;
p is the number of ACK/NAK feedback bits;
Figure FDA0000048415260000103
number of REs occupied at initial transmission for TB of the PUSCH transmission
Figure FDA0000048415260000104
The number of orthogonal frequency division multiplexing OFDM symbols occupied by the TB transmitted by the PUSCH during initial transmission
Figure FDA0000048415260000105
The adjustment parameters for controlling the value of Q' are configured by a high layer;
c is the number of Code blocks when the PUSCH is initially transmitted;
Kris the size of the r Code Block;
Figure FDA0000048415260000106
and the number of REs occupied by the TB transmitted by the PUSCH in the current subframe.
31. An LTE-A system for feedback and reception of acknowledgement information ACK/NAK, comprising a base station and a terminal UE, wherein,
the UE is used for generating P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer, and determining a feedback resource parameter
Figure FDA0000048415260000111
The above-mentioned
Figure FDA0000048415260000112
Is a positive number, and according toDetermining the P ACK/NAK inversionsThe number of Resource Elements (REs) occupied by feedback bits when the feedback bits are transmitted on a Physical Uplink Shared Channel (PUSCH) is transmitted, and the P ACK/NAK feedback bits are transmitted on the PUSCH based on the number of the REs;
the base station is used for determining that the UE generates P ACK/NAK feedback bits, wherein P is a natural number and is a fixed preset parameter, or an agreed preset parameter, or a preset parameter configured by a high layer, and determining a feedback resource parameter
Figure FDA0000048415260000114
The above-mentioned
Figure FDA0000048415260000115
Is a positive number, and according toDetermining the number of REs occupied by the P ACK/NAK feedback bits when transmitted on a PUSCH, and receiving the P ACK/NAK feedback bits sent by the UE on the PUSCH based on the number of REs.
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