CN-122028064-A - Beam management method

CN122028064ACN 122028064 ACN122028064 ACN 122028064ACN-122028064-A

Abstract

The application provides a beam management method, and relates to the technical field of communication. When the mobile terminal is in a stable communication state, the base station may adjust the transmission configuration of the reference signal, that is, the first transmission configuration is adjusted to the second transmission configuration. The reference signal transmission time period corresponding to the second transmission configuration is greater than the reference signal transmission time period corresponding to the first transmission configuration, and/or the number of beams corresponding to the second transmission configuration is less than the number of beams corresponding to the first transmission configuration. The application avoids the waste of base station resources and reduces the power consumption of the base station and the mobile terminal.

Inventors

WANG PENGYU
PANG GAOKUN
WANG ZHAOCHENG

Assignees

荣耀终端股份有限公司
清华大学

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (20)

1. A beam management method, applied to a mobile terminal, comprising: Receiving a first reference signal sent by a base station, wherein the first reference signal corresponds to a first sending configuration; The method comprises the steps of receiving first indication information sent by a base station, sending first indication information to the base station, wherein the first indication information is used for indicating that the mobile terminal is in a stable communication state, and/or receiving second indication information sent by the base station, and the second indication information is used for indicating that the base station adjusts a sending configuration according to the stable communication state; Receiving a second reference signal sent by the base station, wherein the second reference signal corresponds to a second sending configuration; The second transmission configuration is different from the first transmission configuration, the reference signal transmission time period corresponding to the second transmission configuration is greater than the reference signal transmission time period corresponding to the first transmission configuration, and/or the number of beams corresponding to the second transmission configuration is less than the number of beams corresponding to the first transmission configuration.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises, The first reference signal comprises a synchronous signal block SSB and/or a channel state information reference signal CSI-RS; The first transmission configuration comprises a first transmission time period and/or a first set of beams; the second transmission configuration includes a second transmission time period and/or a second set of beams; The second transmission time period is greater than the first transmission time period, and/or the number of beams in the second set of beams is less than the number of beams in the first set of beams.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises, The beams in the first beam set and the beams in the second beam set respectively correspond to beam information; The beam information includes at least one of a sector index, a beam identification, transmission configuration indication TCI status information, CSI-RS resource indicator CRI, SSB resource indicator, SSB time index, reference signal received power RSRP, signal to interference plus noise ratio SINR.
4. The method of claim 1, wherein the step of determining the position of the substrate comprises, The first indication information further includes at least one piece of downlink beam information recommended by the mobile terminal, and the downlink beam information includes at least one of the following: Beam identification, CRI, SSB resource indicator, SSB time index, RSRP, SINR, received signal code power RSCP, ecN0, prediction accuracy, prediction probability, time indication information, SSB information, CSI-RS information, TCI status information, and duration information of the mobile terminal using the downlink beam.
5. The method of claim 4, wherein the at least one downlink beam information recommended by the mobile terminal is predicted by the mobile terminal using a beam prediction model.
6. The method of claim 1, wherein prior to said transmitting the first indication information to the base station, the method further comprises: Receiving base station capability information sent by the base station, wherein the base station capability information is used for indicating the base station to support the communication of the mobile terminal in a stable communication state; And the mobile terminal sends the first indication information to the base station according to the base station capability information.
7. The method of claim 1, wherein after the receiving the first reference signal transmitted by the base station, the method further comprises: And sending terminal capability information to the base station, wherein the terminal capability information is used for indicating the mobile terminal to support communication in a stable communication state.
8. The method according to claim 1, wherein the stable communication state refers to a communication state in which the position of the mobile terminal changes within a preset range for a preset period of time.
9. The method of claim 8, wherein the method further comprises: Acquiring target feature data of the mobile terminal, wherein the target feature data comprises first channel feature data, the first channel feature data is feature data obtained by measuring a reference signal from the base station by the mobile terminal in a first time period, and the first time period is a time period taking the current time as an end point and reaching a preset duration; Taking the target characteristic data as input, running a first AI model, and outputting first output information, wherein the first output information is used for indicating whether the mobile terminal is in the stable communication state or not; And when the first output information is a first value, determining that the mobile terminal is in the stable communication state.
10. The method of claim 9, wherein the target feature data further comprises at least one of: The method comprises the steps of providing position information of the mobile terminal in the first time period, current residence time of the mobile terminal in the stable communication state in the first time period and motion state of the mobile terminal in the first time period.
11. The method according to claim 9, wherein the method further comprises: Receiving a preset AI model from a server, wherein the preset AI model is obtained by training a plurality of mobile terminals by using first sample characteristic data of the mobile terminals in a plurality of stable communication scenes; After the mobile terminal is determined to be in a stable communication state, acquiring second sample characteristic data of the mobile terminal in the stable communication state; and training the first AI model by using the second sample characteristic data to obtain a trained first AI model.
12. The method of claim 11, wherein the method further comprises: And sending the second sample characteristic data to the server, wherein the second sample characteristic data is used for training the preset AI model by the server to obtain the trained preset AI model.
13. The method of claim 11, wherein the first sample characterization data further comprises at least one of location information, current residence time, motion state of a plurality of mobile terminals in a plurality of stable communication scenarios; The second sample characteristic data further comprises at least one of location information, current residence time, motion state of the mobile terminal in the stable communication state.
14. The method of claim 1, wherein prior to the mobile terminal transmitting the first indication information to the base station, the method further comprises: if the signal quality of the mobile terminal is detected to be lower than the quality threshold value, the current position of the mobile terminal is in one or more of a target position range and a target time range, detecting whether the mobile terminal is in a stable communication state.
15. The method of claim 1, wherein the first indication information further comprises scene characteristic information, the scene characteristic information comprising multipath characteristic information of a channel between the mobile terminal and the base station, different multipath characteristic information corresponding to different codebook types.
16. The method according to claim 15, wherein the multipath characteristic information is any one of a first multipath characteristic, a second multipath characteristic, and a third multipath characteristic; The first multipath feature indicates that the channel is dense multipath, the second multipath feature indicates that the channel is sparse multipath, and the third multipath feature indicates that the channel is strong primary multipath; The beam width of the beam generated according to the codebook type corresponding to the first multipath feature is larger than the beam width of the beam generated according to the codebook type corresponding to the second multipath feature, and the beam width of the beam generated according to the codebook type corresponding to the second multipath feature is larger than the beam width of the beam generated according to the codebook type corresponding to the third multipath feature.
17. The method of claim 1, wherein the first indication information further comprises an incoming direction sector index, the incoming direction sector index being an index of a sector having a best received signal quality in the stable communication state by the mobile terminal among the N sectors of the mobile terminal; the N sectors are obtained by dividing the mobile terminal as a center and the current direction of the mobile terminal as a reference on a horizontal plane.
18. The method of claim 1, wherein the first indication information further comprises a future dwell time period predicted by the mobile terminal in the stable communication state, and wherein the frequency at which the base station transmits reference signals is determined based on the future dwell time period.
19. The method of claim 1, wherein after the mobile terminal receives the second reference signal transmitted by the base station, the method further comprises: measuring the second reference signal to obtain a measurement result; calculating the similarity between the measurement result and the historical measurement result; if the similarity is smaller than a similarity threshold, third indication information is sent to the base station, wherein the third indication information is used for indicating the mobile terminal to exit the stable communication state; And receiving a third reference signal sent by the base station, wherein the third reference signal is transmitted through all beams of the base station, and the second reference signal is transmitted through part of beams in all beams.
20. A method of beam management, applied to a base station, the method comprising: according to the first sending configuration, sending a first reference signal to the mobile terminal; The method comprises the steps of receiving first indication information sent by a mobile terminal, wherein the first indication information is used for indicating that the mobile terminal is in a stable communication state, and/or sending second indication information to the mobile terminal, and the second indication information is used for indicating that the base station adjusts sending configuration according to the stable communication state; according to the first indication information, the first sending configuration is adjusted to be a second sending configuration; Transmitting a second reference signal to the mobile terminal according to the second transmission configuration; The second transmission configuration is different from the first transmission configuration, the reference signal transmission time period corresponding to the second transmission configuration is greater than the reference signal transmission time period corresponding to the first transmission configuration, and/or the number of beams corresponding to the second transmission configuration is less than the number of beams corresponding to the first transmission configuration.

Description

Beam management method Technical Field The embodiment of the application relates to the technical field of communication, in particular to a beam management method. Background As the fifth generation mobile communication technology (5th generation mobile communication technology,5G) and the sixth generation mobile communication technology (6th generation mobile communication technology,6G) evolve toward the high frequency band, beam management becomes one of core technologies of the high frequency communication system. Although the high-frequency band signal can provide a larger transmission bandwidth, there are also problems of signal propagation loss such as path loss and penetration loss. To solve these problems, a communication system may employ a massive antenna array (massive MIMO) and a beamforming technique to compensate for signal propagation loss by forming a high-gain narrow beam. The existing beam management mechanism is mainly implemented based on a synchronization signal block (synchronization signal block, SSB) and a channel state information reference signal (CHANNEL STATE information-REFERENCE SIGNAL, CSI-RS). Under the mechanism, the base station needs to transmit a large amount of reference information to cover the space range of the whole cell, and the terminal determines the optimal beam after measuring all the reference information and reports the optimal beam to the base station. And the base station adjusts the downlink wave beam direction according to the reporting result of the terminal to realize wave beam alignment. However, in a scenario where a user resides for a long period of time, such as an office, home, etc., the environment structure is stable for a long period of time, and the signal propagation path has stability and predictability. However, the existing beam management mechanism cannot identify the scene, and still adopts a beam scanning strategy covering the space range of the whole cell, so that a base station needs to transmit a large number of beams, and a terminal needs to measure all the beams, thereby the problems of waste of base station resources and overhigh power consumption of the terminal occur. Disclosure of Invention The embodiment of the application provides a beam management method, when a mobile terminal is in a stable communication state, a base station can adjust the transmission configuration of a reference signal, so that the waste of base station resources is avoided, and the power consumption of the base station and the mobile terminal is reduced. In order to achieve the above purpose, the embodiment of the present application adopts the following technical scheme: In a first aspect, a beam management method is provided, which is applied to a mobile terminal. The method comprises the steps that a mobile terminal receives a first reference signal sent by a base station, the first reference signal corresponds to a first sending configuration, the mobile terminal sends first indication information to the base station and/or receives second indication information sent by the base station, wherein the first indication information is used for indicating the mobile terminal to be in a stable communication state, the second indication information is used for indicating the base station to adjust the sending configuration according to the stable communication state, and the mobile terminal receives a second reference signal sent by the base station, and the second reference signal corresponds to a second sending configuration. The second transmission configuration is different from the first transmission configuration, the reference signal transmission time period corresponding to the second transmission configuration is greater than the reference signal transmission time period corresponding to the first transmission configuration, and/or the number of beams corresponding to the second transmission configuration is smaller than the number of beams corresponding to the first transmission configuration. By adopting the scheme, the position of the mobile terminal is basically stable in a stable communication state, the environment structure is kept unchanged, and the effective signal propagation paths are concentrated in a few fixed directions. The mobile terminal transmits the first indication information to the base station or receives the second indication information of the base station, so that the base station can adjust the transmission of the reference signal from the first transmission configuration to the second transmission configuration (the transmission period is longer and/or the number of beams is smaller), and beam scanning is not required in the whole space range. Compared to the manner in which the base station transmits the reference signal using all beams (e.g., 64 beams) in the prior art, the number of beams corresponding to the second transmission configuration in the embodiment of the present application is reduced. On the one hand,