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US-12621029-B2 - Beam information reporting and receiving method and apparatus

US12621029B2US 12621029 B2US12621029 B2US 12621029B2US-12621029-B2

Abstract

A beam information reporting and receiving method and apparatus are disclosed. The method at least includes: A terminal device receives first activation signaling from a network device, where the first activation signaling is used to activate a first cell, and the first cell is a secondary cell that has a capability of sending a physical uplink control channel PUCCH. The terminal device measures a reference signal of the first cell to determine beam information of the first cell. The terminal device sends layer 2 signaling to the network device by using a second cell, where the layer 2 signaling includes the beam information of the first cell, and the second cell is a primary cell or a primary secondary cell corresponding to the first cell.

Inventors

  • Zhongyi SHEN
  • Li Zhang
  • Jing Han
  • Hong Li

Assignees

  • HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date
20260505
Application Date
20230713

Claims (20)

  1. 1 . An apparatus, comprising a processor and a memory, wherein the memory stores instructions, and when the processor executes the instructions, the apparatus is enabled to perform: receiving, first activation signaling, wherein the first activation signaling indicates to activate a first cell, and the first cell is a secondary cell that has a capability of sending a physical uplink control channel (PUCCH); and when reporting of beam information of the first cell is preconfigured in a second cell, sending the beam information of the first cell in the second cell, wherein the second cell is a primary cell or a primary secondary cell of the first cell.
  2. 2 . The apparatus according to claim 1 , wherein the first cell is an unknown cell.
  3. 3 . The apparatus according to claim 1 , the apparatus is further enabled to perform: sending valid channel state information (CSI), wherein the valid CSI indicates that activation of the first cell is completed.
  4. 4 . The apparatus according to claim 1 , wherein the first cell is a known cell.
  5. 5 . The apparatus according to claim 1 , wherein the second cell is the primary cell of the first cell.
  6. 6 . The apparatus according to claim 1 , wherein the second cell is the primary secondary cell of the first cell.
  7. 7 . A method, comprising: sending, by a network device, first activation signaling to a terminal device, wherein the first activation signaling indicates to activate a first cell, and the first cell is a secondary cell that has a capability of sending a physical uplink control channel (PUCCH); and when reporting of beam information of the first cell is preconfigured in a second cell, receiving, by the network device, the beam information of the first cell from the terminal device in the second cell, wherein the second cell is a primary cell or a primary secondary cell of the first cell.
  8. 8 . The method according to claim 7 , wherein the first cell is an unknown cell.
  9. 9 . The method according to claim 7 , further comprising: receiving, by the network device, valid channel state information (CSI) from the terminal device, wherein the valid CSI indicates that activation of the first cell is completed.
  10. 10 . The method according to claim 7 , further comprising: determining, by the network device, whether the first cell is an unknown cell; and when it is determined that the first cell is the unknown cell, configuring, by the network device, a transmission configuration indicator (TCI) and/or an uplink spatial relation for the first cell.
  11. 11 . The method according to claim 7 , wherein the first cell is a known cell.
  12. 12 . The method according to claim 10 , wherein configuring, by the network device, the TCI and/or the uplink spatial relation for the first cell comprises: configuring, by the network device, the TCI for the first cell.
  13. 13 . The method according to claim 10 , wherein configuring, by the network device, the TCI and/or the uplink spatial relation for the first cell comprises: configuring, by the network device, the uplink spatial relation for the first cell.
  14. 14 . An apparatus, comprising a processor and a memory, wherein the memory stores instructions, and when the processor executes the instructions, the apparatus is enabled to perform: sending first activation signaling, wherein the first activation signaling indicates to activate a first cell, and the first cell is a secondary cell that has a capability of sending a physical uplink control channel (PUCCH); and when reporting of beam information of the first cell is preconfigured in a second cell, receiving the beam information of the first cell in the second cell, wherein the second cell is a primary cell or a primary secondary cell of the first cell.
  15. 15 . The apparatus according to claim 9 , wherein the first cell is an unknown cell.
  16. 16 . The apparatus according to claim 14 , the apparatus is further enabled to perform: receiving valid channel state information (CSI), wherein the valid CSI indicates that activation of the first cell is completed.
  17. 17 . The apparatus according to claim 14 , wherein when the processor executes the instructions, the apparatus is further enabled to perform: determining whether the first cell is an unknown cell; and when it is determined the first cell is the unknown cell, configuring a transmission configuration indicator TCI and/or an uplink spatial relation for the first cell.
  18. 18 . The apparatus according to claim 14 , wherein the first cell is a known cell.
  19. 19 . The apparatus according to claim 17 , wherein configuring the TCI and/or the uplink spatial relation for the first cell comprises: configuring the TCI for the first cell.
  20. 20 . The apparatus according to claim 17 , wherein configuring the TCI and/or the uplink spatial relation for the first cell comprises: configuring the uplink spatial relation for the first cell.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2021/071667, filed on Jan. 14, 2021, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to a beam information reporting and receiving method and apparatus. BACKGROUND In an existing communication system, a network device may improve a system capacity by configuring carrier aggregation (CA). The CA is a technology that aggregates a plurality of component carriers (CCs) to support a larger transmission bandwidth. The plurality of CCs aggregated in the CA include a primary component carrier (PCC) and a secondary component carrier (SCC). A cell corresponding to the PCC is referred to as a primary cell (PCell), and a cell corresponding to the SCC is referred to as a secondary cell (SCell). Secondary cells include a secondary cell that has a capability of sending a physical uplink control channel (PUCCH), which may be referred to as a PUCCH secondary cell for short, and/or a common secondary cell that does not have the capability of sending the PUCCH. How a terminal device reports beam information of the PUCCH secondary cell to the network device in an activation process of the PUCCH secondary cell is a technical problem to be resolved in embodiments of this application. SUMMARY This application provides a beam information reporting and receiving method and apparatus, to implement beam information reporting of a first cell. According to a first aspect, a beam information reporting method is provided, including: A terminal device receives first activation signaling from a network device, where the first activation signaling is used to activate a first cell, and the first cell is a secondary cell that has a capability of sending a physical uplink control channel PUCCH. The terminal device measures a reference signal of the first cell to determine beam information of the first cell. The terminal device sends layer 2 signaling to the network device by using a second cell, where the layer 2 signaling includes the beam information of the first cell, and the second cell is a primary cell or a primary secondary cell corresponding to the first cell. According to the foregoing method, in an activation process of the first cell, the terminal device may report the beam information of the first cell by using the second cell, so that the network device can obtain the beam information of the first cell, thereby implementing activation of the first cell. In a possible implementation, the layer 2 signaling includes media access control control element MAC CE signaling. In a possible implementation, the method further includes: determining, by the terminal device in response to the first activation signaling, whether the first cell is an unknown cell; and if the first cell is the unknown cell, performing the step in which the terminal device measures a reference signal of the first cell to determine beam information of the first cell. For a known cell, the beam information of the first cell has been reported, and no further reporting is required. A beam information of the first cell needs to be reported only for an unknown cell. In this embodiment of this application, before the reference signal of the first cell is measured to determine the beam information of the first cell, whether the first cell is the unknown cell is first determined. In this way, reference signal measurement and beam reporting procedures are avoided for the known cell, thereby reducing power consumption and signaling overheads of the terminal device. Optionally, after the terminal device sends the layer 2 signaling to the network device by using the second cell, the method further includes: The terminal device sends valid channel state information CSI to the network device, where the valid CSI indicates that activation of the first cell is completed. According to the foregoing method, a procedure of the entire solution may be as follows: The network device sends the activation signaling of the first cell to the terminal device. The terminal device reports, in response to the activation signaling, the beam information of the first cell by using the second cell. The network device may configure a TCI, an uplink spatial relation, and/or the like for the terminal device based on the reported beam information of the first cell. The TCI indicates a beam used by the terminal device to receive downlink information, and the uplink spatial relation indicates a beam used by the terminal device to send uplink information. The terminal device sends the valid CSI to the network device to indicate that activation of the first cell is completed. It can be learned from the foregoing descriptions that, in this embodiment of this application, the beam information of the first cell may be reported by using the second cell in the activatio