Search

CN-122026971-A - Beam management method, network side equipment and terminal

CN122026971ACN 122026971 ACN122026971 ACN 122026971ACN-122026971-A

Abstract

The invention provides a beam management method, network side equipment and a terminal, wherein the beam management method comprises the steps of determining a plurality of virtual ports corresponding to an antenna array and precoding matrixes corresponding to the virtual ports, dividing the antenna array into a plurality of subarrays, wherein the number of the virtual ports is P x K, the number of the receiving and transmitting units of the network side equipment is P, the number of the subarrays is K, sending a reference signal to the terminal based on the precoding matrixes and initial beamforming matrixes, receiving a measurement report of the reference signal reported by the terminal, wherein the measurement report comprises precoding matrix indication information, the precoding matrix indication information comprises an index of an optimal precoding matrix determined by the terminal, the optimal precoding matrix is an optimal merging matrix of the virtual ports, and recovering the beamforming matrix according to the precoding matrix indication information. In the invention, the number of the beams for transmitting the reference signals is smaller than that of the beams in the exhaustive traversing scheme, thereby reducing the resource cost and time delay of the beam management.

Inventors

  • GUI XIN
  • HAN ZIXIANG
  • CHENG ZHITIAN
  • JIN JING

Assignees

  • 中国移动通信有限公司研究院
  • 中国移动通信集团有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (17)

  1. 1. A method of beam management, comprising: The method comprises the steps that network side equipment determines a plurality of virtual ports corresponding to an antenna array and a precoding matrix corresponding to the plurality of virtual ports, wherein the antenna array is divided into a plurality of subarrays, the number of the virtual ports is P, P is the number of transceiver units of the network side equipment, K is the number of subarrays, P is a positive integer greater than or equal to 1, and K is a positive integer greater than or equal to 2; The network side equipment sends a reference signal to a terminal based on the precoding matrix and an initial beamforming matrix; The network side equipment receives a measurement report of the reference signal reported by the terminal, wherein the measurement report comprises precoding matrix indication information, the precoding matrix indication information comprises an index of an optimal precoding matrix determined by the terminal, and the optimal precoding matrix is an optimal merging matrix of a plurality of virtual ports; and the network side equipment recovers the beam forming matrix according to the precoding matrix indication information.
  2. 2. The beam management method according to claim 1, further comprising: The network side equipment sends configuration information to the terminal, wherein the configuration information comprises the number of the virtual ports, precoding matrixes corresponding to the virtual ports, antenna configuration information corresponding to the precoding matrixes and information of the reference signals.
  3. 3. The beam management method according to claim 1, wherein, The network side equipment sends reference signals to the terminal based on the precoding matrix and the initial beamforming matrix, and comprises the network side equipment configures a plurality of groups of initial beamforming matrices and sends the reference signals to the terminal based on the precoding matrix and each group of initial beamforming matrices, or The network side equipment executes the following iteration steps for a plurality of times, wherein the iteration steps comprise: Taking the restored beam forming matrix as a new initial beam forming matrix; The network side equipment sends the reference signal to the terminal based on the precoding matrix and the initial beamforming matrix; the network side equipment receives a measurement report of the reference signal reported by the terminal; and the network side equipment recovers the beam forming matrix according to the precoding matrix indication information in the measurement report.
  4. 4. A method of beam management, comprising: The terminal receives configuration information, wherein the configuration information comprises the number of virtual ports corresponding to an antenna array of network side equipment, a precoding matrix corresponding to the virtual ports and information of reference signals, wherein the antenna array is divided into a plurality of subarrays, the number of the virtual ports is P x K, P is the number of transceiver units of the network side equipment, K is the number of the subarrays, P is a positive integer greater than or equal to 1, and K is a positive integer greater than or equal to 2; the terminal receives and measures a reference signal sent by network side equipment based on the configuration information; The terminal determines an equivalent channel corresponding to the virtual port according to a measurement result of the reference signal, determines an index of an optimal precoding matrix according to the equivalent channel, and generates precoding matrix indication information according to the index of the optimal precoding matrix, wherein the optimal precoding matrix is an optimal combining matrix of a plurality of virtual ports; And the terminal sends a measurement report of the reference signal to the network side equipment, wherein the measurement report comprises the precoding matrix indication information.
  5. 5. A method of beam management, comprising: the method comprises the steps that network side equipment constructs a precoding matrix of a first number of virtual ports to a receiving and transmitting unit, wherein the number of precoding vectors in the precoding matrix is the first number, and the first number is smaller than or equal to the number of the receiving and transmitting units of the network side equipment; The network side equipment sends a reference signal to a terminal based on the precoding matrix and an initial beamforming matrix; The network side equipment receives a measurement report of the reference signal reported by the terminal, wherein the measurement report comprises precoding matrix indication information, and the precoding matrix indication information comprises an index of an optimal diagonal matrix determined by the terminal; and the network side equipment determines an optimal precoding matrix according to the optimal diagonal matrix, and restores the beam forming matrix according to the optimal precoding matrix and the initial beam forming matrix.
  6. 6. The beam management method according to claim 5, wherein the network side device determining an optimal precoding matrix according to the optimal diagonal matrix comprises: and the network side equipment determines an optimal precoding matrix according to the optimal diagonal matrix, the constructed precoding matrix and the optimal combining matrix corresponding to the plurality of receiving and transmitting units.
  7. 7. The beam management method according to claim 5, wherein the network side device sends a reference signal to a terminal based on the precoding matrix and an initial beamforming matrix, comprising: the network side equipment generates a plurality of precoded reference signals based on the precoding matrix, and configures different initial beamforming matrixes for the precoded reference signals respectively.
  8. 8. A method of beam management, comprising: the terminal receives and measures a reference signal sent by network side equipment; The terminal determines an equivalent channel corresponding to the receiving and transmitting unit according to the measurement result of the reference signal, determines an optimal diagonal index according to the equivalent channel, and generates precoding matrix indication information according to the optimal diagonal index; And the terminal sends a measurement report of the reference signal to the network side equipment, wherein the measurement report comprises precoding matrix indication information.
  9. 9. The beam management method according to claim 8, wherein the measurement report further includes an optimal combining matrix corresponding to the plurality of transceiver units.
  10. 10. A network side device, comprising: The first determining module is used for determining a plurality of virtual ports corresponding to an antenna array and a precoding matrix corresponding to the plurality of virtual ports, wherein the antenna array is divided into a plurality of subarrays, the number of the virtual ports is P, P is the number of transceiver units of the network side equipment, K is the number of the subarrays, P is a positive integer greater than or equal to 1, and K is a positive integer greater than or equal to 2; a first transmitting module, configured to transmit a reference signal to a terminal based on the precoding matrix and an initial beamforming matrix; The receiving module is used for receiving a measurement report of the reference signal reported by the terminal, wherein the measurement report comprises precoding matrix indication information, the precoding matrix indication information comprises an index of an optimal precoding matrix determined by the terminal, and the optimal precoding matrix is an optimal combining matrix of a plurality of virtual ports; and the second determining module is used for recovering the beam forming matrix according to the precoding matrix indication information.
  11. 11. A terminal, comprising: The receiving module is used for receiving configuration information, wherein the configuration information comprises the number of virtual ports corresponding to an antenna array of network side equipment, a precoding matrix corresponding to the virtual ports and information of reference signals, the antenna array is divided into a plurality of subarrays, the number of the virtual ports is P, P is the number of transceiver units of the network side equipment, K is the number of the subarrays, P is a positive integer greater than or equal to 1, and K is a positive integer greater than or equal to 2; the measurement module is used for receiving and measuring a reference signal sent by the network side equipment based on the configuration information; The determining module is used for determining an equivalent channel corresponding to the virtual port according to the measurement result of the reference signal, determining an index of an optimal precoding matrix according to the equivalent channel, and generating precoding matrix indication information according to the index of the optimal precoding matrix, wherein the optimal precoding matrix is an optimal combining matrix of a plurality of virtual ports; and the sending module is used for sending a measurement report of the reference signal to the network side equipment, wherein the measurement report comprises precoding matrix indication information.
  12. 12. A network side device, comprising: a construction module, configured to construct a precoding matrix of a first number of virtual ports to a transceiver unit, where the number of precoding vectors in the precoding matrix is the first number, and the first number is less than or equal to the number of transceiver units of the network side device; a transmitting module, configured to transmit a reference signal to a terminal based on the precoding matrix and an initial beamforming matrix; The receiving module is used for receiving a measurement report of the reference signal reported by the terminal, wherein the measurement report comprises precoding matrix indication information, and the precoding matrix indication information comprises an index of an optimal diagonal matrix determined by the terminal; and the determining module is used for determining an optimal precoding matrix according to the optimal diagonal matrix and recovering the beam forming matrix according to the optimal precoding matrix and the initial beam forming matrix.
  13. 13. A terminal, comprising: the measuring module is used for receiving and measuring the reference signal sent by the network side equipment; the determining module is used for determining an equivalent channel corresponding to the receiving and transmitting unit according to the measurement result of the reference signal, determining an optimal diagonal array index according to the equivalent channel, and generating precoding matrix indication information according to the optimal diagonal array index; and the sending module is used for sending a measurement report of the reference signal to the network side equipment, wherein the measurement report comprises precoding matrix indication information.
  14. 14. A network side device comprising a processor, a memory and a program stored on the memory and executable on the processor, the program implementing the steps of the beam management method according to any one of claims 1 to 3 when executed by the processor or the steps of the beam management method according to any one of claims 5 to 7 when executed by the processor.
  15. 15. A terminal comprising a processor, a memory and a program stored on the memory and executable on the processor, the program implementing the steps of the beam management method according to claim 4 when being executed by the processor or the steps of the beam management method according to claim 8 or 9 when being executed by the processor.
  16. 16. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of the beam management method according to any one of claims 1 to 3, or which computer program, when being executed by a processor, implements the steps of the beam management method according to claim 4, or which computer program, when being executed by a processor, implements the steps of the beam management method according to any one of claims 5 to 7, or which computer program, when being executed by a processor, implements the steps of the beam management method according to claim 8 or 9.
  17. 17. A computer program product comprising computer instructions which when executed by a processor implement the steps of the beam management method according to any one of claims 1 to 3 or which when executed by a processor implement the steps of the beam management method according to claim 4 or which when executed by a processor implement the steps of the beam management method according to any one of claims 5 to 7 or which when executed by a processor implement the steps of the beam management method according to claim 8 or 9.

Description

Beam management method, network side equipment and terminal Technical Field The embodiment of the invention relates to the technical field of wireless communication, in particular to a beam management method, network side equipment and a terminal. Background In existing millimeter wave (mmWave) systems, using ultra-large-scale antenna arrays is a straightforward and efficient way to improve coverage by beamforming gain due to the effects of path loss and penetration loss. In addition, in the communication perception integrated system, in order to improve the perception precision, such as the precision of distance measurement or angle measurement, a beam with better directivity can be beaten out through a large-scale antenna, so that the perception precision is further improved. The existing scheme has the following problems: After the number of antenna elements becomes larger, the number of beams that can be made larger. Assuming that the phase shifter to which each antenna array is connected supports 8 phases, 1024 antenna arrays can theoretically strike out 8 1024 different beams. And the number of beams increases geometrically as the number of antennas increases. In beam management of a communication system, a network side configures different reference signals to associate different analog beams, and a User Equipment (UE, which may also be called a terminal) measures reference signal received powers (REFERENCE SIGNAL RECEIVED Power, RSRP) or signal-to-interference-plus-noise ratios (Signal to Interference plus Noise Ratio, SINR) of the different reference signals and reports a best beam index. Since the analog beams do not support frequency division, the different beams can only be transmitted in time division multiplexing (Time division multiplexing, TDM). When a large-scale antenna array is adopted, the extremely large time-frequency resource of a network layer and the processing overhead of the UE are consumed. In addition, if the beam management time delay is too long, the real-time performance of the positioning of the sensing system is greatly influenced. Disclosure of Invention The embodiment of the invention provides a beam management method, network side equipment and a terminal, which are used for solving the problem that the existing beam management scheme adopts the beams associated with all antenna arrays to be traversed in an exhaustive way, so that great resource expenditure and time delay are caused. In order to solve the technical problems, the invention is realized as follows: in a first aspect, an embodiment of the present invention provides a beam management method, including: The method comprises the steps that network side equipment determines a plurality of virtual ports corresponding to an antenna array and a precoding matrix corresponding to the plurality of virtual ports, wherein the antenna array is divided into a plurality of subarrays, the number of the virtual ports is P, P is the number of transceiver units of the network side equipment, K is the number of subarrays, P is a positive integer greater than or equal to 1, and K is a positive integer greater than or equal to 2; The network side equipment sends a reference signal to a terminal based on the precoding matrix and an initial beamforming matrix; The network side equipment receives a measurement report of the reference signal reported by the terminal, wherein the measurement report comprises precoding matrix indication information, the precoding matrix indication information comprises an index of an optimal precoding matrix determined by the terminal, and the optimal precoding matrix is an optimal merging matrix of a plurality of virtual ports; and the network side equipment recovers the beam forming matrix according to the precoding matrix indication information. Optionally, the method further includes that the network side device sends configuration information to the terminal, wherein the configuration information includes the number of the virtual ports, precoding matrixes corresponding to the virtual ports, antenna configuration information corresponding to the precoding matrixes, and information of reference signals. Optionally, the network side equipment sends a reference signal to the terminal based on the precoding matrix and the initial beamforming matrix, and comprises the steps that the network side equipment configures a plurality of groups of initial beamforming matrices and sends the reference signal to the terminal based on the precoding matrix and each group of initial beamforming matrices; Or alternatively The network side equipment executes the following iteration steps for a plurality of times, wherein the iteration steps comprise: Taking the restored beam forming matrix as a new initial beam forming matrix; The network side equipment sends a reference signal to a terminal based on the precoding matrix and an initial beamforming matrix; the network side equipment receives a measurement report of th