CN-122002405-A - Communication method and device

CN122002405ACN 122002405 ACN122002405 ACN 122002405ACN-122002405-A

Abstract

A communication method and device relate to the technical field of communication. In the method, in the cell switching process, the serving cell triggers measurement of the reference signal (for example, CSI-RS) resource of the target cell and/or report of the measurement result, so that the access network device corresponding to the target cell can acquire the measurement result of the reference signal resource of the target cell in advance, and further determine the data scheduling mode of the target cell, thereby being beneficial to improving the reliability and efficiency of data transmission after the cell switching is finished (namely, after the cell is switched from the serving cell to the target cell).

Inventors

LI FANG
FAN BO
YUAN SHITONG

Assignees

华为技术有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (20)

1. A method of communication, comprising: receiving first information from a serving cell, wherein the first information is used for triggering measurement of a reference signal resource of a target cell and/or reporting of a measurement result after receiving a cell switching signaling, and the target cell is a candidate cell corresponding to a candidate cell index in the cell switching signaling; and sending the measurement result of the reference signal resource of the target cell to the target cell.
2. The method of claim 1, wherein the first information comprises one or more of the following: Information of the triggering state of the serving cell, a report configuration index of the serving cell, a reference signal resource set index of the target cell, or a reference signal resource index of the target cell; the reporting configuration of the serving cell is associated with the triggering state of the serving cell, the reporting configuration of the serving cell associated with the triggering state of the serving cell or the reference signal resource set associated with the reporting configuration corresponding to the reporting configuration index of the serving cell includes the reference signal resource or the reference signal resource set of the target cell, and the reference signal resource set of the target cell includes the reference signal resource of the target cell.
3. The method according to claim 2, wherein the method further comprises: And determining the reference signal resource of the target cell according to the information of the triggering state of the serving cell, the report configuration index of the serving cell, the reference signal resource set index of the target cell and one or more information of the reference signal resource index of the target cell, wherein the information is included in the first information.
4. A method according to claim 2 or 3, characterized in that, In case the trigger state of the serving cell is associated with one reporting configuration of the serving cell, the one reporting configuration is associated with at least the reference signal resource or the reference signal resource set of the target cell, or In case the trigger state of the serving cell is associated with a plurality of reporting configurations of the serving cell, at least one reporting configuration of the plurality of reporting configurations is associated with a reference signal resource or a set of reference signal resources of the target cell.
5. The method according to any of claims 1-4, wherein prior to said receiving the first information from the serving cell, the method further comprises: receiving first configuration information from the serving cell, the first configuration information comprising one or more reporting configurations of the serving cell, wherein the one reporting configuration of the serving cell is associated with one or more reference signal resource sets, the one or more reference signal resource sets comprising reference signal resources of one or more candidate cells, the one or more candidate cells comprising the target cell.
6. The method of claim 5, wherein prior to receiving the first information from the serving cell, the method further comprises: And receiving second configuration information from the serving cell, wherein the second configuration information is used for configuring an association relation between one or more transmission configuration indication states (TCI states) of the candidate cells and a trigger state of the serving cell or a report configuration of the serving cell, and the one or more TCI states of the candidate cells in the association relation comprise TCIstate of target cells corresponding to TCI state indexes of the target cells indicated in the cell switching signaling.
7. The method of claim 6, wherein the method further comprises: receiving the cell switching signaling from the service cell, wherein the cell switching signaling comprises a TCI state index of the target cell; And measuring a reference signal resource of the target cell and/or reporting a measurement result of the reference signal resource of the target cell based on the TCI state of the target cell corresponding to the TCI state index of the target cell, wherein the second configuration information and the first configuration information are included in a trigger state of the serving cell associated with the TCI state of the target cell corresponding to the TCI state index of the target cell or a reference signal resource set associated with reporting configuration of the serving cell.
8. The method of claim 1, wherein prior to the receiving the first information from the serving cell, the method further comprises: And receiving third configuration information from the serving cell, where the third configuration information is used to configure an association relationship between one or more TCI states of a candidate cell and a reference signal resource or a reference signal resource set of the candidate cell, and one or more TCIstate of candidate cells in the association relationship includes TCIstate of the target cell corresponding to a TCIstate index of the target cell in the cell handover signaling.
9. The method of claim 8, wherein the method further comprises: receiving the cell switching signaling from the service cell, wherein the cell switching signaling comprises a TCI state index of the target cell; And measuring the reference signal resource of the target cell and/or reporting the measurement result of the reference signal resource of the target cell based on the TCI state of the target cell corresponding to the TCI state index of the target cell and the third configuration information, wherein the reference signal resource of the target cell is the reference signal resource of the candidate cell associated with the TCI state of the target cell corresponding to the TCI state index of the target cell or the reference signal resource in the associated reference signal resource set.
10. The method according to any of claims 1-9, wherein the first information is carried on downlink control information for scheduling the cell handover signaling, or the first information is carried on downlink control information for scheduling a first uplink transmission of a target cell.
11. The method according to claim 10, wherein in case the first information is carried in the cell handover signaling, a first field is further included in the cell handover signaling, the first field being used to indicate whether the first information is present in the cell handover signaling.
12. The method according to any of claims 1-11, wherein the measurement result of the reference signal resource of the target cell is carried in any of the following uplink resources: uplink resources scheduled by uplink authorization information carried in the random access response; the uplink channel used for the first uplink transmission after switching to the target cell is scheduled or preconfigured by downlink control information; uplink resources corresponding to uplink resource information carried in the cell switching signaling, wherein the uplink resource information is uplink authorization information or an uplink resource index; And the preconfigured uplink resource is associated uplink resource configured for reporting the service cell included in the first information, or the preconfigured uplink resource is associated uplink resource of the triggering state of the service cell included in the first information, or the preconfigured uplink resource is preconfigured uplink resource which is specially used for reporting the measurement result of the reference signal resource of the target cell for the first time after receiving the cell switching signaling.
13. The method according to any one of claims 1-12, further comprising: And sending capability information, wherein the capability information indicates the terminal to support measurement of the reference signal resource of the triggering candidate cell of the serving cell and/or report of a measurement result.
14. A method of communication, comprising: Determining first information, wherein the first information is used for triggering measurement of reference signal resources of a target cell and/or reporting of measurement results after receiving cell switching signaling, and the target cell is a candidate cell corresponding to a candidate cell index in the cell switching signaling; and sending the first information.
15. The method of claim 14, wherein prior to the transmitting the first information, the method further comprises: Transmitting first configuration information, the first configuration information comprising one or more reporting configurations of the serving cell, wherein the one reporting configuration of the serving cell is associated with one or more reference signal resource sets, the one or more reference signal resource sets comprising reference signal resources of one or more candidate cells, the one or more candidate cells comprising the target cell.
16. The method of claim 15, wherein the method further comprises: And sending second configuration information, wherein the second configuration information is used for configuring an association relation between TCI states of candidate cells and a triggering state of the service cell or a reporting configuration of the service cell, and the TCI states of the candidate cells in the association relation comprise TCI states of the target cells corresponding to TCI state indexes of the target cells indicated in the cell switching signaling.
17. The method of claim 14, wherein the method further comprises: And sending third configuration information, wherein the third configuration information is used for configuring an association relation between one or more TCI states of the candidate cell and a reference signal resource or a reference signal resource set of the candidate cell, and the one or more TCI states of the candidate cell in the association relation comprise the TCI state of the target cell corresponding to the TCI state index of the target cell in the cell switching signaling.
18. The method according to any one of claims 14-17, further comprising: And receiving capability information, wherein the capability information indicates a serving cell supported by the terminal to trigger channel state information acquisition measurement and/or reporting of the candidate cell.
19. A communication device comprising means or modules for implementing the method according to any of claims 1-13 or means or modules for implementing the method according to any of claims 14-18.
20. A communication device comprising a processor for executing a computer program or instructions, causing the communication device to implement the method of any one of claims 1-13 or causing the communication device to implement the method of any one of claims 14-18.

Description

Communication method and device Technical Field The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus. Background Currently, the access network device may configure reference signal resources of one or more candidate cells for the terminal, and the terminal may feed back measurement results of the reference signal resources of the one or more candidate cells by measuring the configured reference signal resources, where the measurement results of the reference signal resources of each candidate cell include a reference signal resource index and corresponding signal strength information (e.g. reference signal received power (REFERENCE SIGNAL RECEIVING power, RSRP)). The access network device can determine whether the terminal performs cell switching and to which candidate cell (i.e. target cell) to switch according to the measurement result fed back by the terminal. However, at present, besides the signal strength information, acquiring more channel state information (CHANNEL STATE information, CSI) information of the candidate cell before or during cell switching is not supported, so that the access network device cannot perform data scheduling on the switched target cell by adopting a proper scheduling mode, which is not beneficial to reliability and efficiency of data transmission. Disclosure of Invention The application provides a communication method and a communication device, which are beneficial to improving the reliability and the efficiency of data transmission. The application is described below in terms of various aspects, with the understanding that the embodiments and advantages of the various aspects below may be referenced to one another. In a first aspect, the present application provides a communication method, which may be applied to a terminal-side communication device, for example, a terminal or a communication module/processing module in the terminal, or a circuit or a chip in the terminal that is responsible for a communication function (such as a modem (modem) chip, also called a baseband (baseband) chip, or a system on chip (SoC) chip or a system-in-package (SYSTEMIN PACKAGE, SIP) chip that includes a modem core), or a circuit or a chip in the terminal that is responsible for a processing function (such as a graphics processor (graphics processing unit, GPU), an artificial intelligence (ARTIFICIAL INTELLIGENCE, AI) processor, or an application-specific integrated circuit (ASIC)). Taking the method as an example, the terminal receives first information from a serving cell, wherein the first information is used for triggering measurement of reference signal resources of a target cell and/or reporting of measurement results after receiving cell switching signaling, and the target cell is a candidate cell corresponding to a candidate cell index in the cell switching signaling. Therefore, after the terminal receives the cell handover signaling, the terminal can measure the reference signal resource of the target cell by the terminal to obtain the measurement result of the reference signal resource of the target cell, and then the terminal sends the measurement result of the reference signal resource of the target cell to the target cell. Alternatively, the terminal may also measure the reference signal resources of the target cell before receiving the cell handover signaling, and send the measurement result of the reference signal resources of the target cell to the target cell after receiving the cell handover signaling. Illustratively, the following description will be mainly made with reference signal resources as CSI-RS resources. Alternatively, it may be described that the first information is used to trigger the reporting of the measurement and/or measurement result of the CSI-RS resource of the target cell, or that the first information is used to trigger the terminal to perform the reporting of the measurement and/or measurement result of the CSI-RS resource of the target cell after receiving the cell handover signaling, or that the first information is used to trigger the reporting of the measurement and/or measurement result of the CSI-RS resource of the target cell after receiving the cell handover signaling, and before actually switching to the target cell, or that the first information is used to trigger the terminal to perform the reporting of the measurement and/or measurement result of the CSI-RS resource of the target cell after receiving the cell handover signaling, and before actually switching to the target cell, or that the first information is used to trigger the reporting of the measurement and/or measurement result of the CSI-RS resource of the target cell in the cell handover process, or that the first information is used to trigger the candidate for the reporting of the measurement and/or measurement result of the measurement RS resource of the target cell. It should be understood t