CN115669038B

CN115669038B - Beam management method, device, equipment and storage medium

Info

Publication number: CN115669038B
Application number: CN202080101128.0A
Authority: CN
Inventors: 林雪; 石聪; 李海涛
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2024-10-22
Anticipated expiration: 2040-07-13
Also published as: CN115669038A; WO2022011505A1

Abstract

The application provides a beam management method, a device, equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: the terminal measures the synchronous signal block SSB in an inactive state according to the measurement configuration; according to the measurement result, determining first beam information, wherein the first beam information is information for indicating the network equipment to adjust downlink transmission beams and uplink receiving beams; and reporting the first beam information to the network equipment by adopting an uplink resource for the inactive state data transmission IDT. The terminal informs the network equipment whether the beam direction of the terminal changes during data transmission or not through the reported first beam information, and the network equipment adjusts a downlink transmitting beam and an uplink receiving beam during communication with the terminal according to the first beam information. That is, the application can inform the network equipment to adjust the wave beam under the condition that the transmission wave beam of the terminal is changed, thereby ensuring the communication quality between the network equipment and the terminal.

Description

Beam management method, device, equipment and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a beam management method, a device, equipment and a storage medium.

Background

For most communication systems, terminals may be in different states depending on the traffic activity to reduce terminal power consumption. Three RRC (Radio Resource Control ) states are defined in the NR (New radio) system: rrc_idle (RRC IDLE state), rrc_connected (RRC CONNECTED state), and rrc_inactive (RRC INACTIVE state).

In addition, in the NR system, particularly when the communication band is in the band range 2, since the attenuation of the high-frequency channel is fast, beam-based transmission and reception are required between the network device and the terminal in order to secure the coverage. In the RRC connected state, the network device sends measurement configuration information of the beam to the terminal, and the terminal measures the Channel state according to the measurement configuration information, and reports CSI (Channel-Sate Information, channel state information) to the network device, so that the network device determines whether to need to adjust the beam direction, so that the network device can better receive uplink data.

When the terminal is in an RRC inactive state, CSI report is not carried out, and the network equipment does not know whether the beam direction of the current terminal changes during data transmission or whether the downlink beam direction is still a better beam direction for the current terminal. Therefore, for IDT (rrc_ INACTIVE DATA Transmission) procedure, a set of beam management methods needs to be designed to ensure the communication quality between the terminal and the network device.

Disclosure of Invention

The embodiment of the application provides a beam management method, a device, equipment and a storage medium, which enable a terminal to report beam adjustment information to network equipment when the terminal is in an inactive state so as to facilitate the network equipment to adjust downlink transmission beams and uplink receiving beams in time. The technical scheme is as follows:

in one aspect, a beam management method is provided and applied to a terminal, and the method includes:

according to the measurement configuration, measuring the synchronous signal block SSB in an inactive state;

according to the measurement result, determining first beam information, wherein the first beam information is information for indicating the network equipment to adjust downlink transmission beams and uplink receiving beams;

and reporting the first beam information to network equipment by adopting an uplink resource for the inactive state data transmission IDT.

In another aspect, a beam management method is provided, applied to a network device, and the method includes:

And receiving first beam information reported by a terminal, wherein the first beam information is reported through uplink resources for the data transmission IDT in an inactive state, and the first beam information is determined by the terminal according to measurement configuration by measuring a synchronous signal block SSB.

In another aspect, there is provided a beam management apparatus, the apparatus comprising:

the measurement module is used for measuring the synchronous signal block SSB in an inactive state according to measurement configuration;

The determining module is used for determining first beam information according to the measurement result, wherein the first beam information is information for indicating the network equipment to adjust a downlink transmission beam and an uplink reception beam;

And the sending module is used for reporting the first beam information to the network equipment by adopting the uplink resource for the inactive state data transmission IDT by the terminal.

The receiving module is configured to receive first beam information reported by a terminal, where the first beam information is reported through an uplink resource used for inactive state data transmission IDT, and the first beam information is determined by the terminal by measuring a synchronization signal block SSB according to a measurement configuration.

In another aspect, a terminal is provided that includes a processor and a memory storing at least one instruction for execution by the processor to implement any of the methods performed by the terminal in the above aspects.

In another aspect, a network device is provided that includes a processor and a memory storing at least one instruction for execution by the processor to implement any of the methods performed by the network device in the above aspects.

In another aspect, a computer-readable storage medium having instructions stored thereon that when executed by a processor implement the method of the above aspect performed by a terminal is provided.

In another aspect, a computer-readable storage medium having instructions stored thereon that when executed by a processor implement the method of the above aspect performed by a network device is provided.

In another aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method performed by a terminal as described in the above aspects.

In another aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspect performed by a network device.

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

The terminal measures the synchronous signal block SSB in an inactive state according to the measurement configuration; according to the measurement result, determining first beam information, wherein the first beam information is information for indicating the network equipment to adjust downlink transmission beams and uplink receiving beams; and reporting the first beam information to the network equipment by adopting an uplink resource for the inactive state data transmission IDT. The terminal informs the network equipment whether the beam direction of the terminal changes during data transmission through the reported first beam information, and the network equipment adjusts a downlink transmitting beam and an uplink receiving beam during communication with the terminal according to the first beam information. That is, the application can inform the network device to adjust the wave beam in time under the condition that the transmission wave beam of the terminal changes, thereby ensuring the communication quality of the network device and the terminal in the inactive state.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of a 5G communication system provided by an exemplary embodiment of the present application;

fig. 2 is a flow chart of a beam management method provided by an exemplary embodiment of the present application;

Fig. 3 is a flowchart of a beam management method based on a four-step random access procedure according to an exemplary embodiment of the present application;

fig. 4 is a flowchart of a beam management method based on a two-step random access procedure according to an exemplary embodiment of the present application;

fig. 5 is a flowchart of a CG resource-based beam management method provided by an exemplary embodiment of the present application;

fig. 6 is a schematic structural view of a beam management apparatus according to an exemplary embodiment of the present application;

fig. 7 is a schematic structural view of a beam management apparatus according to another exemplary embodiment of the present application;

Fig. 8 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Before describing the data closing method provided by the embodiment of the present application in detail, related terms and implementation environments related to the embodiment of the present application will be briefly described.

First, related terms related to the present application will be explained.

1. Four-step random access process:

The first step: the terminal transmits to the network device an Msg1, which is a Random access preamble sequence (i.e., preamble), also called PRACH (Physical Random-ACCESS CHANNEL, physical Random access channel).

The terminal sends Msg1 to the network device to inform the network device of a random access request, and at the same time, the network device can estimate the transmission delay between itself and the terminal, and calibrate the uplink time according to the transmission delay.

As an example, the information of the resource transmitting Msg1 may be obtained through a resource configuration of RACH (Random ACCESS CHANNEL ). In Rel-15 NR technology, RACH resource configuration information configured for terminal access is defined, including 256 kinds, and a cell can indicate RACH resource configuration information used by itself to a terminal in a system message. Each RACH resource configuration information includes a preamble format, a period, a radio frame offset, a subframe number within a radio frame, a starting symbol within a subframe, a number of PRACH slots within a subframe, a number of PRACH occasions within a PRACH slot, and a PRACH occasion duration. The time, frequency and code information of the PRACH resource can be determined through the information, so that the terminal can send Msg1 on the corresponding PRACH resource according to the RACH resource configuration information indicated by the network equipment.

And a second step of: after detecting the Msg1 sent by the terminal, the network device sends an RAR (Msg 2) to the terminal to inform the terminal of uplink resource information that can be used when sending the next message (Msg 3).

The RAR may include a response message to a plurality of terminals transmitting the preamble, and the response message to each terminal includes a random access preamble identification field rapid, resource allocation information of Msg3, TA (TRACKING AREA ) information, etc. used by each terminal.

Of course, other operations may be performed by the network device in addition to this, such as allocating a temporary RNTI (Radio Network Temporary Identity ) to the terminal, etc., which are not described here too much.

And a third step of: and the terminal receives the RAR and sends the Msg3 to the network equipment on the uplink resource indicated by the RAR.

In some embodiments, the terminal may monitor PDCCH (Physical Downlink Control Channel ) in a search space within one RAR time window corresponding to the RAR to receive the RAR. The RAR time window may be configured by a higher layer parameter, and configuration information of a search space of the PDCCH may be indicated by a system message.

If the terminal does not receive the RAR sent by the network equipment in the RAR time window, the random access process is considered to be failed. If the terminal receives an RAR and the preamble index in the RAR is the same as the preamble index sent by the terminal, the terminal considers that the RAR is successfully received, and can stop monitoring the RAR at this time, and the terminal sends Msg3 to the network device.

As an example, the Msg3 may carry a terminal specific temporary identity information or a terminal identity from the core network, e.g. the terminal identity may be S-TMSI (Serving-Temporary Mobile Subscriber Identity) or a random number.

Fourth step: after receiving the Msg3, the network device sends an Msg4 to the terminal.

As an example, the Msg4 includes a contention resolution message and includes information of uplink transmission resources allocated to the terminal, and the network device may, for example, carry a unique flag in the Msg4 in the contention resolution mechanism to indicate the terminal that wins the contention. When the terminal receives the Msg4 sent by the base station, it can detect whether the temporary identification information sent by the terminal in the Msg3 is contained in the contention resolution message sent by the network device, if so, it indicates that the random access process of the terminal is successful, otherwise, the random process is considered to be failed, and the terminal needs to initiate the random access process from the first step again.

2. Two-step random access procedure

In 5g NR release16, in order to reduce system delay, two-step random access is proposed, where the two-step random access consists of two-step messages.

The first step: the terminal sends MsgA to the network device, and the MsgA is composed of a preamble and a PUSCH (Physical Uplink SHARED CHANNEL ), and the preamble and the PUSCH are sent in a TDM (Time Division Multiplexing) mode.

The PUSCH in MsgA is similar to Msg3 in four-step random access, and specific terminal identity information is carried in the PUSCH in MsgA, so that the network equipment can identify the terminal identity.

And a second step of: the network device feeds back MsgB to the terminal.

MsgB are similar to RAR messages, msg4 messages in four-step random access, which include at least TA (TRACKING AREA ) information, and contention resolution messages.

3. Resource scheduling and configuration authorization:

in the 5G NR standard, for uplink resource scheduling, 2 kinds of resource scheduling methods are supported, one is dynamic resource scheduling, and the other is semi-static resource scheduling.

The dynamic resource scheduling refers to that the network device transmits an uplink scheduling grant (UL grant) to the terminal device, where the UL grant contains time-frequency domain resources occupied by the scheduled uplink data channel. The terminal device may send uplink data on the indicated time-frequency resource according to the indication of the UL grant.

The semi-static resource scheduling refers to that the network device sends a semi-static configuration signaling to the terminal device, where the semi-static configuration signaling includes time-frequency domain resources occupied by the scheduled uplink data channel. Semi-static resource scheduling is divided into 2 types in the NR standard. The type 1 is that the network device configures a periodic uplink data channel for the terminal device semi-statically at the radio resource control layer to transmit data. Type 2 is that the network device configures periodic uplink data channels for the terminal device semi-statically at the radio resource control layer to transmit data, but requires activation of downlink control information from the physical layer. The semi-static configuration signaling is also used for indicating that the uplink data adopts a repeated transmission mode. In one period, the terminal device may repeatedly transmit the same data transport block on the configured uplink data channel.

To better serve periodic traffic, NR systems introduce the concept of preconfigured resources. The network device may pre-configure resources required for uplink data transmission of the terminal device by using RRC (Radio Resource Control ) signaling in a semi-static resource allocation manner, that is, pre-configure transmission resources, for example, CG (Configured Grant) resources. The configured transmission resources can appear according to the period, and the terminal equipment does not need to obtain uplink authorization before sending uplink transmission each time.

4. Beam management

Beam management is for data communications in high frequency scenarios, the creation and maintenance of beam management is a suitable pair of beams, selecting a suitable receive beam at the receiver and a suitable transmit beam at the transmitter, in combination maintaining a good wireless connection. The transmitter and receiver may be network devices or terminals.

In many cases, the optimal beam pair for one downlink transmission will tend to be the optimal beam pair for the uplink transmission as well, and vice versa. In 3GPP (3 rd Generation Partnership Project, third generation partnership project) protocols, this uplink and downlink consistency is referred to as beam consistency. Beam consistency means that once a suitable beam pair is selected in one transmission direction, the beam pair can be used directly in the opposite direction.

Beam management can generally be divided into the following sections:

(1) Initial beam set-up

Initial beam set-up refers to the function and procedure of initially setting up beam pairs for the uplink and downlink directions. When the connection is established, the terminal acquires SSB (Synchronization Signal Block ) sent by the network device in the initial cell search process. A typical network device will transmit multiple SSBs, which are transmitted in sequence, and each SSB is carried on a different downlink transmit beam. On the one hand, the SSB is associated with a downlink transmission beam, and on the other hand, the SSB is also associated with resources such as uplink random access opportunities (RACH Occasion, RO), preambles, etc., so that the network device can learn, through random access, the downlink beam selected by the terminal, thereby establishing an initial beam pair.

(2) Beam adjustment

When the initial beam pair is established, it is necessary to periodically re-evaluate whether the selection of the receiving side beam and the transmitting side beam is still appropriate due to movement, rotation, etc. of the terminal.

As an example, the terminal may measure a set of reference signals that would correspond to a set of downlink beams, and the terminal may determine the optimal downlink beam pair by the measurement. The terminal reports the optimal downlink transmission beam information determined by measurement to the network equipment, and the network equipment decides whether to adjust the downlink transmission beam used later according to the measurement result.

(3) Beam recovery

Beam recovery refers to the process of recovering a beam pair in time when the transmission of the current beam pair is blocked. The beam recovery process includes: beam failure detection, identification of new alternative beams, terminal recovery request and network response.

For beam management, the present application is focused on initial beam setup and beam adjustment, as will be further explained in the following embodiments.

Next, an implementation environment related to the embodiment of the present application will be briefly described.

Fig. 1 illustrates a block diagram of a 5G communication system provided by an exemplary embodiment of the present disclosure, which may include: access network 12 and terminal 14.

Access network 12 includes a number of network devices 120 therein. The network device 120 may be a base station, which is a means deployed in an access network to provide wireless communication functionality for terminals. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of base station capable devices may vary, for example in LTE systems, called enodebs or enbs; in the 5G NR system, it is called gNodeB or gNB. As communication technology evolves, the description of "base station" may change. For convenience of description in the embodiments of the present disclosure, the above-described means for providing the terminal 14 with a wireless communication function are collectively referred to as a network device.

The terminal 14 can include various handheld devices, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile Stations (MSs), terminal devices (TERMINAL DEVICE), and the like. For convenience of description, the above-mentioned devices are collectively referred to as a terminal. The network device 120 and the terminal 14 communicate with each other via some air interface technology, e.g. Uu interface.

The technical solution of the embodiment of the present disclosure may be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile Communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general Packet Radio Service (GPRS), long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, long term evolution advanced (Advanced long Term Evolution, LTE-a) system, new Radio (NR) system, NR system evolution system, LTE on unlicensed band (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), global interconnect microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (WIRELESS FIDELITY, WIFI), next generation communication system or other communication system, and the like.

Generally, the number of connections supported by the conventional Communication system is limited and easy to implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, device-to-Device (D2D) Communication, machine-to-machine (Machine to Machine, M2M) Communication, machine type Communication (MACHINE TYPE Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) Communication, and internet of vehicles (Vehicle to Everything, V2X) systems. The embodiments of the present application may also be applied to these communication systems.

Having described the relevant terms and the implementation environment related to the embodiments of the present application, the following describes the data closing method provided by the embodiments of the present application in detail with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart illustrating a beam management method according to an exemplary embodiment of the present application, which may be applied to the above-described 5G communication system shown in fig. 1, and may include at least some of the following:

Step 210: the network device sends an RRC release message to the terminal, the RRC release message carrying measurement configuration information.

Wherein the measurement configuration information is used for the terminal to determine the measurement configuration. When the terminal enters an inactive state, the network device sends measurement configuration information to the terminal, so that the terminal can perform operations such as cell reselection and RRC connection recovery according to the acquired measurement configuration information.

Step 220: the terminal acquires measurement configuration information.

Based on the acquired measurement configuration information, the NR terminal can perform different measurements. For most configured measurements, the terminal needs to report the measurement results to the network device. The measurement configuration information comprises measurement objects, measurement report quantity and actual report modes.

The number of measurement reports in the measurement configuration information may be multiple or one. As one example, measuring the reporting number includes: the indication reports the received signal strength, otherwise known as RSRP (REFERENCE SIGNAL RECEIVED Power ). The NR not only uses RSRP measurement reporting in RRM (Radio Resource Management ), but also introduces RSRP reporting in layer 1, and applies to beam management. The RSRP report at layer 1 may be referred to as L1-RSRP.

The measurement configuration information includes at least one set of measurement objects, i.e., physical resources for downlink measurement. A measurement resource allocation is associated with at least one set of resources with which the terminal measures channel characteristics. As one example, the set of resources in the inactive state may include a set of configured SSBs, one for each beam.

It should be noted that, measurement configuration information is predefined; or the measurement configuration information is determined according to a radio resource control RRC release message.

The RRC release message is a message sent by the network device to the terminal before the terminal enters the RRC inactive state, where the message may be sent by RRC signaling, cell broadcast, or other proprietary signaling, which the present application is not limited to.

Step 230: and the terminal measures the SSB in the inactive state according to the measurement configuration.

In beam management, a measurement configuration includes: a set of SSBs and a measurement item that need to be measured. As one example, the measurement item may be RSRP.

That is, the terminal measures RSRP of each SSB according to the measurement configuration.

Step 240: and the terminal determines the first beam information according to the measurement result.

The first beam information is information for instructing the network device to adjust a downlink transmission beam and an uplink reception beam.

And the terminal determines the optimal downlink receiving beam according to the measurement result, and determines the optimal uplink sending beam of the terminal according to the beam consistency principle.

Meanwhile, according to the measurement result, the terminal can also determine which beam of the network equipment has the best signal quality when the terminal adopts the optimal uplink transmission beam to transmit the data packet to the network equipment, thereby determining the optimal downlink transmission beam of the network equipment.

That is, the terminal obtains RSRP values corresponding to the SSBs through measurement, and determines a unique SSB from the RSRP values, and considers the beam corresponding to the SSB to be the optimal downlink transmission beam of the network device.

As an example, the terminal determines, by measurement, that the optimal downlink reception beam is beam a, and according to the beam consistency principle, the optimal uplink transmission beam of the terminal is also beam a. Similarly, the terminal determines that the optimal downlink transmitting beam of the network device is the beam 1 through measurement, and the optimal uplink receiving beam of the network device is the beam 1 according to the beam consistency principle.

The terminal determines the first beam information according to the measurement result, wherein the first beam information comprises the following two possible implementation manners:

In one possible implementation, the terminal determines the SSB with the largest RSRP as the first SSB according to the measurement result. The identity corresponding to the first SSB is determined as first beam information.

In another possible implementation manner, the terminal obtains at least one SSB by taking SSBs with RSRP greater than a threshold value as candidate SSBs according to the measurement result. One target SSB is determined from the at least one candidate SSB, and an identification corresponding to the target SSB is determined as the first beam information.

The above identification includes a synchronization signal block index SSB index.

It should be noted that the first SSB and the target SSB are used to indicate a certain beam among communication beams supported between the terminal and the network device. The determination of the target SSB from the candidate SSBs may be based on RSRP values or other selection criteria, which the present application does not limit, as long as a single SSB is selected.

The threshold value may be a preset value, or may be a value carried by the network device in the measurement configuration information, which is not limited by the present application.

It should be noted that, when the terminal needs to perform measurement of beamforming at the receiving end (terminal), the terminal needs to use different receiving beams to measure SSB sent in the downlink, the measurement result is used by the terminal itself, and the uplink sending beam used by the terminal itself does not need to be reported to the network device, so the first beam information mentioned in the present application is used to indicate the network device to perform optimal downlink sending beam and uplink receiving beam.

As one example, the first beam information may be: SSB-2, and the downlink transmission beam corresponding to SSB-2 is beam 2. The first beam information indicates that when the terminal uses the beam B to send the uplink data packet, the optimal uplink receiving beam of the network device is the beam 2.

Step 250: and the terminal adopts uplink resources for the IDT to report the first beam information to the network equipment.

The uplink resources for the IDT include any one of the following uplink resources:

in the four-step random access process, uplink resources indicated by a first scheduling grant received by a Random Access Response (RAR);

The network equipment authorizes CG resources for configuration of the terminal for inactive state data transmission;

The network equipment schedules uplink resources for inactive state data transmission through the PDCCH.

It should be noted that, the uplink resources configured as described above may be included in the acquired measurement configuration information, or may be notified to the terminal through a separate message before the terminal performs beam measurement of the terminal, which is not limited in the present application.

When the terminal reports the first beam information, the terminal may report the first beam information through a MAC CE (MAC Control Element, medium access control cell).

With the development of the 5G technology, the method for reporting the first beam information by the terminal is not limited to one of the above MAC CEs, and only the requirement that the terminal report the first beam information to the network device is emphasized here.

Step 260: and the network equipment receives the first beam information reported by the terminal.

The first beam information is reported through uplink resources for the inactive state data transmission IDT, and the first beam information is determined by the terminal according to measurement configuration by measuring the synchronization signal block SSB.

Optionally, the uplink resources for IDT include any of the following uplink resources:

in the four-step random access process, uplink resources indicated by a first scheduling grant sent by a Random Access Response (RAR);

The network equipment schedules uplink resources for inactive state data transmission through a physical downlink control channel PDCCH.

Optionally, the receiving the first beam information reported by the terminal includes:

The first beam information is received by the MAC CE.

Step 270: and the network equipment adjusts the downlink sending beam and the uplink receiving beam according to the first beam information.

The network device determines a downlink transmitting beam corresponding to the SSB index according to the SSB index in the first beam information, and simultaneously, according to a beam consistency principle, the network device can determine an optimal uplink receiving beam and receive a subsequent data packet sent by the terminal by using the beam. And when the network equipment needs to send a message to the terminal, a downlink sending beam corresponding to the SSB index is also adopted.

Typically, the SSB index indicates the same beam supported by the network device, and only differs in the uplink and downlink directions when receiving and transmitting data.

As an example, if the first beam information is: SSB-2, and the downlink transmission beam corresponding to SSB-2 is beam 2. The first beam information indicates that when the terminal transmits an uplink data packet by using the beam B, the optimal uplink reception beam of the network device is also the beam 2.

At this time, in order to better receive the data packet sent by the terminal, the network device may adjust the beam of the received data packet to beam 2, and use beam 2 to perform subsequent transmission of the data packet with the terminal until receiving new beam information sent by the terminal.

In the embodiment of the application, the network equipment sends configuration measurement information to the terminal when the terminal enters the RRC inactive state, the terminal acquires the configuration measurement information, and according to the measurement configuration, the network equipment measures RSRP of a group of SSB in the inactive state. And determining first beam information according to the measurement result, and reporting the first beam information to the network equipment by adopting uplink resources for transmitting the IDT, so that the network equipment can adjust uplink receiving beams and downlink sending beams in time according to the first beam information, and the communication quality between the network equipment and the terminal is ensured.

In the embodiment based on fig. 2, the following three scenarios are included.

Scene 1: and realizing beam management based on a four-step random access process.

Scene 2: beam management is achieved based on a two-step random access procedure.

Scene 3: beam management is implemented based on CG resources.

It should be noted that, in all of the above 3 scenarios, the beam management method shown in fig. 2 may be adopted, and the processes of beam measurement, reporting the first beam information, and adjusting the beam may be implemented in the inactive state.

Next, a procedure for realizing beam management in three exemplary scenarios will be explained.

For scenario 1, reference is made in connection with fig. 3. Fig. 3 is a flowchart illustrating a beam management method based on a four-step random access procedure according to an exemplary embodiment of the present application.

Step 310: the terminal determines an uplink transmission beam and a downlink reception beam through measurement, and informs the network device of first beam information through Msg1 (preamble).

As an example, as shown in fig. 3, the terminal determines the uplink transmission beam as beam a through configuration measurement. At this time, the network device does not know the direction of the uplink transmission beam of the terminal, so the network device keeps omni-directional reception before receiving the Msg1 of random access, and avoids missing the data or the request message sent by the terminal.

In addition, when the terminal transmits uplink data by adopting the beam a, the network device optimally receives the beam as the beam 2, so that SSB index corresponding to the beam 2 is used as the first beam information.

The first beam information is sent to the network device over RO resources associated with the SSB.

Step 320: the network equipment successfully receives the Msg1, determines the downlink transmission beam and the uplink reception beam as the beam 2, and adjusts the subsequent uplink reception beam and downlink transmission beam to the beam 2.

As shown in fig. 3, the network device transmits a random access response to the terminal through the beam 2 after correctly receiving the preamble.

Wherein the random access response may include: and the scheduling grant is used for indicating the time-frequency domain resource which can be used when the terminal transmits the subsequent Msg 3. In the present application, the uplink resource of the scheduling grant may be used to transmit the second beam information.

The second beam information is only for distinguishing from the first beam information, and the second beam information and the first beam information are both information for instructing the network device to perform beam adjustment, and only the SSB index carried in the first beam information and the second beam information are different.

Step 330: when the terminal detects the beam change, it is determined that the optimal downlink transmission beam of the network device is changed from the beam 2 to the beam 1 according to the measurement result, and it is determined that the optimal reception beam of the terminal is changed from the beam a to the beam B when the network device transmits with the beam 1.

Thus, the terminal transmits to the network device an Msg3 with beam a, the Msg3 comprising the second beam information. The second beam information is SSB index of SSB corresponding to beam 1, and the terminal may carry the second beam information in MAC CE on the uplink resource.

Step 340: the network device receives the Msg3 by using the beam 2 before adjustment, and adjusts the downlink transmission beam to the beam 1 according to the second beam information.

The network device sends Msg4 for contention resolution to the terminal via beam 1, and at the same time, the terminal receives Msg4 using the adjusted beam B.

Step 350: the network device sends a first scheduling grant to the terminal through the beam 1, and the terminal uses the time-frequency domain resource indicated by the first scheduling grant to transmit a data packet.

Step 360: the terminal detects a beam change before transmitting the data packet using the first scheduling grant. The third beam information is sent to the network device.

As an example, if the terminal detects that the optimal downlink transmission beam is changed from beam 1 to beam 2 and the optimal downlink reception beam is changed from beam B to beam a, SSB index of SSB corresponding to beam 2 is used as the third beam information. The terminal may carry the third beam information in the MAC CE on the uplink resource.

Step 370: the network device receives the third beam information through the beam 1, and adjusts the subsequent downlink transmission beam and uplink reception beam to be the beam 2.

At this time, the terminal also adjusts the downlink reception beam to beam a.

If the network device does not change, the network device receives uplink data by using the beam 2 and transmits downlink data by using the beam 2 until the network device transmits the RRC release message.

In the embodiment of the application, in the four-step random access process, the terminal performs SSB measurement before conflict resolution to judge whether beam change occurs. When the change of the downlink transmission beam is detected, the SSB index of the SSB corresponding to the optimal downlink transmission beam is used as first beam information to be reported to the network equipment, so that the beam management can be realized in an inactive state, and the communication quality between the network equipment and the terminal is ensured.

For scenario 2, reference is made in connection with fig. 4. Fig. 4 is a flowchart illustrating a beam management method based on a two-step random access procedure according to an exemplary embodiment of the present application

Step 410: the terminal determines an uplink receiving beam and a downlink transmitting beam through measurement and informs the network device of first beam information through MsgA (preamble).

Similar to step 310, the terminal determines, through measurement, that the terminal's optimal uplink transmission beam is beam a, and that the network device's optimal downlink transmission beam is beam 2. After receiving the first beam information, the network equipment determines the downlink transmitting beam as a beam 2, and determines the optimal uplink receiving beam of the network equipment as the beam 2 according to the beam consistency principle.

After transmission MsgA, the terminal sends the information payload MsgA Payload of message a to the network device. At this point, the network device receives MsgA Payload from the terminal using beam 2.

After the terminal transmits MsgA Payload, the SSB is measured according to the measurement configuration to determine whether the beam changes.

As an example, the terminal determines that the optimal downlink reception beam is changed from beam a to beam B, and likewise, the optimal downlink transmission beam of the network device is changed from beam 2 to beam 1.

Step 420: the network device sends a contention conflict resolution message to the terminal over beam 2.

Step 430: the network device sends the uplink scheduling grant to the terminal through the beam 2, and the terminal uses the time-frequency domain resource indicated by the uplink scheduling grant to transmit the data packet.

Step 440: and before the terminal adopts the uplink resource to transmit the data packet, if the terminal detects the beam change, transmitting second beam information to the network equipment through the MAC CE.

The second beam information is SSB index of SSB corresponding to beam 1.

Step 450: the network device successfully receives the second beam information through the original beam 2, and adjusts the downlink transmission beam to be the beam 1 for subsequent data transmission.

At this time, the terminal adjusts the downlink reception beam to beam B.

If the network device does not change, the network device receives uplink data by using the beam 1 and transmits downlink data by using the beam 1 until the network device transmits the RRC release message.

In the embodiment of the application, in the two-step random access process, the terminal performs SSB measurement before receiving MsgB, and judges whether the wave beam is changed. And after receiving the scheduling grant of the network equipment, reporting the first beam information to the network equipment through the uplink resource. The first beam information is SSB index of SSB corresponding to the optimal downlink transmission beam of the network equipment, the network equipment can adjust the uplink reception beam and the downlink transmission beam of the network equipment according to the first beam information, and the communication quality of the terminal and the network equipment in an inactive state is ensured.

For scenario 3, reference is made in connection with fig. 5. Fig. 5 shows a flowchart of a CG resource-based beam management method provided by an exemplary embodiment of the present application.

Step 510: the terminal determines the uplink transmit beam and the downlink receive beam, e.g., beam a, by measurement. Meanwhile, the terminal determines the optimal downlink transmitting beam and uplink receiving beam of the network device through measurement, for example, beam 2, and takes SSB index of SSB corresponding to beam 2 as first beam information.

Since the network device is preconfigured with periodic transmission resources, it is not necessary to wait for the scheduling grant of the network device when in use. As an example, when IDT transmission is performed using CG resources, the MAC CE carries the first beam information, and informs the network device of the optimal downlink transmit beam.

And the network equipment omnidirectionally receives the uplink data sent by the terminal, and if the uplink data is successfully received, the downlink sending beam and the uplink receiving beam which are used for transmitting the data subsequently are determined through the first beam information reported by the terminal.

As an example, if the first beam information is SSB index of SSB corresponding to beam 2, the network device adjusts its own downlink transmission beam and uplink reception beam to beam 2 after receiving the information.

After the terminal has sent the first beam information, it continuously measures the SSB according to the measurement configuration to determine whether the beam changes.

Step 520: the network device sends the uplink scheduling grant to the terminal through the beam 2, and the terminal uses the time-frequency domain resource indicated by the uplink scheduling grant to transmit the data packet.

Step 530: before the terminal sends the data packet on the uplink resource, if the beam change is detected, the changed second beam information is sent to the network equipment through the MAC CE.

As an example, before the terminal transmits a data packet using the uplink resource, it is determined that the terminal's optimal downlink reception beam is changed from beam a to beam B, and likewise, the network device's optimal downlink transmission beam is changed from beam 2 to beam 1.

The second beam information is SSB index of SSB corresponding to beam 1.

Step 540: the network device successfully receives the second beam information through the original beam 2, and adjusts the downlink transmission beam to be the beam 1 for subsequent data transmission.

At this time, the terminal adjusts the downlink reception beam to beam B.

In the embodiment of the application, the terminal sends the first beam information based on the pre-configured CG resource, and the network equipment adjusts the uplink receiving beam and the downlink sending beam according to the first beam information, so that the whole process does not need to wait for configuration authorization of the network equipment, and the method is simple and quick. Meanwhile, the first beam information indicates the optimal downlink sending beam and uplink receiving beam of the network equipment, so that the communication quality between the terminal and the network equipment in the inactive state is ensured.

The above method embodiments may be implemented individually or in combination, and the disclosure is not limited thereto. The several embodiments described above are presented for purposes of illustration only and not of limitation. It should be appreciated that other trigger opportunities may also be employed, and other implementations may be employed, including but not limited to any combination of the above alternatives.

Fig. 6 is a schematic structural diagram of a beam management apparatus according to an exemplary embodiment, the apparatus 600 may be a terminal or implemented as a part of a terminal, and the apparatus 600 includes: a measurement module 610, a determination module 620, and a transmission module 630.

A measurement module 610, configured to measure the synchronization signal block SSB in an inactive state according to a measurement configuration;

a determining module 620, configured to determine first beam information according to the measurement result, where the first beam information is information for instructing the network device to adjust a downlink transmission beam and an uplink reception beam;

the sending module 630 is configured to report the first beam information to the network device by using an uplink resource for the IDT for inactive state data transmission by the terminal.

Optionally, the determining module 620 includes:

a first determining submodule, configured to determine, according to the measurement result, an SSB with the maximum reference signal received power RSRP as a first SSB;

And the second determining submodule is used for determining the identification corresponding to the first SSB as the first beam information.

Optionally, the determining module 620 includes:

A third determining submodule, configured to obtain at least one candidate SSB by using SSBs with RSRP greater than a threshold value as candidate SSBs according to the measurement result;

A fourth determination submodule for determining a target SSB from the at least one candidate SSB;

and a fifth determining submodule, configured to determine an identifier corresponding to the target SSB as the first beam information.

Optionally, the identifying comprises: the synchronization signal block indexes SSB index.

Optionally, the apparatus 600 further includes:

The acquiring module 640 is configured to acquire measurement configuration information.

Optionally, the measurement configuration information is predefined;

Or the measurement configuration information is determined according to a radio resource control RRC release message.

Optionally, reporting the first beam information to the network device includes:

and reporting the first beam information through a Media Access Control (MAC) cell MAC CE.

In the embodiment of the application, the terminal measures the synchronous signal block SSB in the inactive state according to the measurement configuration, determines the first beam information according to the measurement result, and reports the first beam information to the network equipment by adopting the uplink resource for the inactive state data transmission IDT. The first beam information is information for indicating the network equipment to adjust the downlink transmission beam and the uplink reception beam, so that the terminal not only determines the self-optimal downlink reception beam by measurement, but also determines the optimal downlink transmission beam of the network equipment, and the first beam information is reported to the network equipment, thereby realizing beam management in an inactive state and ensuring the communication quality between the terminal and the network equipment.

Fig. 7 is a schematic structural diagram of a beam management apparatus according to another exemplary embodiment, which may be implemented as a network device or as a part of a network device, and the apparatus 700 includes: a receiving module 710, a transmitting module 720 and an adjusting module 730.

The receiving module 710 is configured to receive first beam information reported by the terminal, where the first beam information is reported through an uplink resource used for the IDT for inactive data transmission, and the first beam information is determined by the terminal by measuring the synchronization signal block SSB according to a measurement configuration.

Optionally, the apparatus 700 further comprises:

A sending module 720, configured to send a radio resource control RRC release message, where the RRC release message carries measurement configuration information, and the measurement configuration information is used by the terminal to determine measurement configuration.

the first beam information is received by a medium access control cell MAC CE.

Optionally, the apparatus 700 further comprises:

and the adjusting module is used for adjusting the downlink transmitting beam and the uplink receiving beam according to the first beam information.

In the embodiment of the application, the network equipment receives the first beam information reported by the terminal, wherein the first beam information is reported through the uplink resource used for the inactive state data transmission IDT, and the first beam information is determined by the terminal according to measurement configuration by measuring the synchronous signal block SSB. Therefore, the network equipment can adjust the uplink receiving beam and the downlink sending beam of the network equipment according to the first beam information so as to adapt to the beam adjustment of the terminal, and the communication quality between the terminal and the network equipment in the non-activated state is ensured.

Referring to fig. 8, a schematic structural diagram of a communication device (terminal or network device) according to an exemplary embodiment of the present application is shown, where the communication device includes: a processor 801, a receiver 802, a transmitter 803, a memory 804, and a bus 805.

The processor 801 includes one or more processing cores, and the processor 801 executes various functional applications and information processing by running software programs and modules.

The receiver 802 and the transmitter 803 may be implemented as one communication component, which may be a communication chip.

The memory 804 is connected to the processor 801 through a bus 805.

The memory 804 is operable to store at least one instruction that the processor 801 is operable to execute to implement the steps performed by the first IAB network device in the various method embodiments described above.

Further, the memory 804 may be implemented by any type of volatile or nonvolatile storage device, including but not limited to: magnetic or optical disks, EEPROMs (ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY ), EPROMs (Erasable Programmable Read-Only Memory, erasable programmable Read Only Memory), SRAMs (Static Random Access Memory ), ROMs (Read Only Memory), magnetic memories, flash memories, PROMs (Programmable Read-Only Memory, programmable Read Only Memory).

The present application provides a computer readable storage medium having stored therein at least one instruction loaded and executed by the processor to implement the beam management method provided by the above-described method embodiments.

The present application also provides a computer program product which, when run on a computer, causes the computer to perform the beam management method provided by the above-mentioned respective method embodiments.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.

Claims

1. A beam management method, applied to a terminal, the method comprising:

Reporting the first beam information to network equipment by adopting uplink resources for the inactive state data transmission IDT; wherein,

The uplink resource for IDT includes configuration grant CG resource configured by the network device for the terminal and used for inactive state data transmission;

wherein, according to the measurement result, determining the first beam information includes:

Determining the SSB with the maximum Reference Signal Received Power (RSRP) as a first SSB according to the measurement result;

and determining an identification corresponding to the first SSB as the first beam information.

2. The method of claim 1, wherein the uplink resources for IDT further include any of the following uplink resources:

and the network equipment schedules uplink resources for inactive state data transmission through a physical downlink control channel PDCCH.

3. The method of claim 1, wherein the step of determining the position of the substrate comprises,

The identification includes: the synchronization signal block indexes SSB index.

4. The method of claim 1, wherein prior to the SSB measurement based on the measurement information configured by the network device, the method further comprises:

and acquiring measurement configuration information.

5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,

The measurement configuration information is predefined;

6. The method according to any one of claims 1 to 5, wherein reporting the first beam information to a network device comprises:

and reporting the first beam information through a Media Access Control (MAC) cell.

7. A method of beam management, for use with a network device, the method comprising:

Receiving first beam information reported by a terminal, wherein the first beam information is reported through uplink resources for an inactive state data transmission IDT, and the first beam information is determined by the terminal according to measurement configuration by measuring a synchronous signal block SSB; wherein,

Wherein determining the first beam information comprises:

determining the SSB with the maximum Reference Signal Received Power (RSRP) as a first SSB according to the measurement result; and determining an identification corresponding to the first SSB as the first beam information.

8. The method of claim 7, wherein the uplink resources for IDT further include any of the following uplink resources:

9. The method of claim 7, wherein the method further comprises:

and sending a Radio Resource Control (RRC) release message, wherein the RRC release message carries measurement configuration information, and the measurement configuration information is used for the terminal to determine measurement configuration.

10. The method according to any one of claims 7 to 9, wherein receiving the first beam information reported by the terminal includes:

the first beam information is received by a medium access control cell, MAC CE.

11. The method according to any one of claims 7 to 9, further comprising:

and adjusting a downlink sending beam and an uplink receiving beam according to the first beam information.

12. A beam management apparatus, configured in a terminal, the apparatus comprising:

a sending module, configured to report the first beam information to a network device by using an uplink resource for an IDT in an inactive state; wherein,

Wherein, the determining module includes:

13. The apparatus of claim 12, wherein the uplink resources for IDT further comprise any of the following uplink resources:

14. The apparatus of claim 13, wherein the device comprises a plurality of sensors,

15. The apparatus of claim 12, wherein the apparatus further comprises:

and the acquisition module is used for acquiring the measurement configuration information.

16. The apparatus of claim 15, wherein the device comprises a plurality of sensors,

The measurement configuration information is predefined;

17. The apparatus according to any one of claims 12 to 16, wherein the reporting the first beam information to a network device comprises:

18. A beam management apparatus for use with a network device, the apparatus comprising:

the receiving module is used for receiving first beam information reported by a terminal, wherein the first beam information is reported through uplink resources for an inactive state data transmission IDT, and the first beam information is determined by the terminal by measuring a synchronous signal block SSB according to measurement configuration; wherein,

Wherein determining the first beam information comprises: determining the SSB with the maximum Reference Signal Received Power (RSRP) as a first SSB according to the measurement result; and determining an identification corresponding to the first SSB as the first beam information.

19. The apparatus of claim 18, wherein the uplink resources for IDT further comprise any of the following uplink resources:

20. The apparatus of claim 18, wherein the apparatus further comprises:

and the sending module is used for sending a Radio Resource Control (RRC) release message, wherein the RRC release message carries measurement configuration information, and the measurement configuration information is used for the terminal to determine measurement configuration.

21. The apparatus according to any one of claims 18 to 20, wherein receiving the first beam information reported by the terminal includes:

the first beam information is received by a medium access control cell, MAC CE.

22. The apparatus according to any one of claims 18 to 20, further comprising:

And the adjusting module is used for adjusting the downlink sending beam and the uplink receiving beam according to the first beam information.

23. A terminal comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to perform the steps of the method of any of claims 1-6.

24. A network device comprising a processor and a memory storing at least one instruction for execution by the processor to implement the steps of the method of any one of claims 7-11.

25. A computer readable storage medium having instructions stored thereon, which when executed by a processor, implement the steps of the method of any of claims 1-6.

26. A computer readable storage medium having instructions stored thereon, which when executed by a processor, implement the steps of the method of any of claims 7-11.