Carrier aggregation parameter configuration method, device, and system

1. A carrier aggregation parameter configuration method, applied to a first device, wherein the method comprises:

sending first information to a second device, wherein the first information is used to indicate a target carrier aggregation parameter configured for a sidelink service, and the sidelink service is a sidelink service between the first device and the second device;

wherein the sending first information to a second device comprises:

sending target information to the second device, the target information comprising the first information; wherein

in a case that the target information is layer 2 control signaling, after the sending target information to the second device, the method further comprises:

in a case that the target carrier aggregation parameter has changed, sending second control signaling to the second device, wherein the second control signaling comprises second information, the second information is used to indicate a reconfigured target carrier aggregation parameter, and the second control signaling is layer 2 control signaling; or

in a case that the target carrier aggregation parameter remains unchanged, periodically sending third control signaling to the second device, wherein the third control signaling comprises the first information, and the third control signaling is layer 2 control signaling;

wherein after the sending second control signaling to the second device, the method further comprises:

in a case that the target carrier aggregation parameter remains unchanged, periodically sending the second control signaling to the second device.

2. The method according to claim 1 , wherein the third control signaling further comprises an indication field, and the indication field is used to indicate whether the target carrier aggregation parameter has been reconfigured.

3. The method according to claim 1 , wherein the target carrier aggregation parameter comprises at least one of: a first carrier configuration list, at least one second carrier configuration list, or first indication information corresponding to each service; and

the first carrier configuration list corresponds to at least one service, each second carrier configuration list corresponds to one service, and first indication information corresponding to one service is used to indicate whether carrier aggregation transmission is to be performed for the one service; or

wherein the target carrier aggregation parameter comprises at least one of: a first carrier activation list, a number of carriers for carrier aggregation, or second indication information; and

the first carrier activation list corresponds to a target service, the second indication information is used to indicate whether carrier aggregation transmission is to be performed for the target service, and the target service is all services or a specified service.

4. A carrier aggregation parameter configuration method, applied to a second device, wherein the method comprises:

receiving first information sent by a first device, wherein the first information is used to indicate a target carrier aggregation parameter configured for a sidelink service, and the sidelink service is a sidelink service between the first device and the second device;

wherein the receiving first information sent by a first device comprises:

receiving target information sent by the first device, wherein the target information comprises the first information; wherein

in a case that the target information is layer 2 control signaling, after the receiving target information sent by the first device, the method further comprises:

in a case that the target carrier aggregation parameter has changed, receiving second control signaling sent by the first device, wherein the second control signaling comprises second information, the second information is used to indicate a reconfigured target carrier aggregation parameter, and the second control signaling is layer 2 control signaling; or

in a case that the target carrier aggregation parameter remains unchanged, periodically receiving third control signaling sent by the first device, wherein the third control signaling comprises the first information, and the third control signaling is layer 2 control signaling;

wherein after the receiving second control signaling to the second device, the method further comprises:

in a case that the target carrier aggregation parameter remains unchanged, periodically receiving the second control signaling sent by the first device.

5. The method according to claim 4 , wherein after the receiving target information sent by the first device, the method further comprises:

receiving a service based on capability information of the second device and the target carrier aggregation parameter, wherein

the capability information of the second device is used to indicate a multi-carrier reception capability of the second device.

6. The method according to claim 5 , wherein the receiving a service based on capability information of the second device and the target carrier aggregation parameter comprises:

in a case that the target carrier aggregation parameter indicates that a first service is transmitted on a first carrier, receiving the first service on the first carrier, wherein the first carrier is a single carrier; or

in a case that the target carrier aggregation parameter indicates that a first service is transmitted on M second carriers, if the multi-carrier reception capability of the second device is within a capability range indicated by the target carrier aggregation parameter, receiving the first service on the M second carriers; or if the multi-carrier reception capability of the second device is beyond a capability range indicated by the target carrier aggregation parameter, giving up receiving the first service on the M second carriers; wherein M is an integer greater than 1.

7. The method according to claim 6 , wherein after the receiving the first service on the M second carriers, the method further comprises:

receiving target indication information sent by the first device, wherein the target indication information is used to indicate that a second service is transmitted on a third carrier, and the third carrier is a single carrier;

within second duration after the target indication information is received, continuing to receive the first service on the M second carriers; and

after the second duration, stopping receiving the first service on the M second carriers, and starting to receive the second service on the third carrier.

8. The method according to claim 4 , wherein after the receiving target information sent by the first device, the method further comprises:

determining, based on the target information, whether to update a target carrier aggregation parameter stored in the second device.

9. The method according to claim 8 , wherein the target information further comprises an indication field, and the indication field is used to indicate whether the target carrier aggregation parameter has been reconfigured; and

the determining, based on the target information, whether to update a target carrier aggregation parameter stored in the second device comprises:

in a case that a value of the indication field is same as a first value, determining not to update the target carrier aggregation parameter stored in the second device; or

in a case that a value of the indication field is different from a first value, determining to update the target carrier aggregation parameter stored in the second device, wherein

the first value is a value of the indication field last received by the second device.

10. The method according to claim 4 , wherein the target carrier aggregation parameter comprises at least one of following: a first carrier configuration list, at least one second carrier configuration list, or first indication information corresponding to each service; and

the first carrier configuration list corresponds to at least one service, each second carrier configuration list corresponds to one service, and first indication information corresponding to one service is used to indicate whether carrier aggregation transmission is to be performed for the one service.

11. The method according to claim 4 , wherein the target carrier aggregation parameter comprises at least one of following: a first carrier activation list, a number of carriers for carrier aggregation, or second indication information; and

the first carrier activation list corresponds to a target service, the second indication information is used to indicate whether carrier aggregation transmission is to be performed for the target service, and the target service is all services or a specified service.

12. A device, wherein the device is a second device, and the second device comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, steps of the carrier aggregation parameter configuration method according to claim 4 are implemented.

13. The device according to claim 12 , wherein the computer program, when executed by the processor, causes the second device to further perform:

receiving a service based on capability information of the second device and the target carrier aggregation parameter, wherein

the capability information of the second device is used to indicate a multi-carrier reception capability of the second device.

14. The device according to claim 13 , wherein the computer program, when executed by the processor, causes the second device to further perform:

in a case that the target carrier aggregation parameter indicates that a first service is transmitted on a first carrier, receiving the first service on the first carrier, wherein the first carrier is a single carrier; or

in a case that the target carrier aggregation parameter indicates that a first service is transmitted on M second carriers, if the multi-carrier reception capability of the second device is within a capability range indicated by the target carrier aggregation parameter, receiving the first service on the M second carriers; or if the multi-carrier reception capability of the second device is beyond a capability range indicated by the target carrier aggregation parameter, giving up receiving the first service on the M second carriers; wherein M is an integer greater than 1.

15. The device according to claim 14 , wherein the computer program, when executed by the processor, causes the second device to further perform:

receiving target indication information sent by the first device, wherein the target indication information is used to indicate that a second service is transmitted on a third carrier, and the third carrier is a single carrier;

within second duration after the target indication information is received, continuing to receive the first service on the M second carriers; and

after the second duration, stopping receiving the first service on the M second carriers, and starting to receive the second service on the third carrier.

16. The device according to claim 12 , wherein the computer program, when executed by the processor, causes the second device to further perform:

determining, based on the target information, whether to update a target carrier aggregation parameter stored in the second device.

17. The device according to claim 16 , wherein the target information further comprises an indication field, and the indication field is used to indicate whether the target carrier aggregation parameter has been reconfigured; and

the computer program, when executed by the processor, causes the second device to perform:

in a case that a value of the indication field is same as a first value, determining not to update the target carrier aggregation parameter stored in the second device; or

in a case that a value of the indication field is different from a first value, determining to update the target carrier aggregation parameter stored in the second device, wherein

the first value is a value of the indication field last received by the second device.

18. A device, wherein the device is a first device, and the first device comprises a processor, a memory, and a computer program stored in the memory and executable on the processor; the computer program, when executed by the processor, causes the first device to perform:

sending first information to a second device, wherein the first information is used to indicate a target carrier aggregation parameter configured for a sidelink service, and the sidelink service is a sidelink service between the first device and the second device;

wherein the computer program, when executed by the processor, causes the first device to perform:

sending target information to the second device, the target information comprising the first information; wherein

in a case that the target information is layer 2 control signaling, the computer program, when executed by the processor, causes the first device to further perform:

in a case that the target carrier aggregation parameter has changed, sending second control signaling to the second device, wherein the second control signaling comprises second information, the second information is used to indicate a reconfigured target carrier aggregation parameter, and the second control signaling is layer 2 control signaling; or

in a case that the target carrier aggregation parameter remains unchanged, periodically sending third control signaling to the second device, wherein the third control signaling comprises the first information, and the third control signaling is layer 2 control signaling;

wherein the computer program, when executed by the processor, causes the first device to further perform:

in a case that the target carrier aggregation parameter remains unchanged, periodically sending the second control signaling to the second device.

19. The device according to claim 18 , wherein the third control signaling further comprises an indication field, and the indication field is used to indicate whether the target carrier aggregation parameter has been reconfigured.

20. The device according to claim 18 , wherein the target carrier aggregation parameter comprises at least one of: a first carrier configuration list, at least one second carrier configuration list, or first indication information corresponding to each service; and

the first carrier configuration list corresponds to at least one service, each second carrier configuration list corresponds to one service, and first indication information corresponding to one service is used to indicate whether carrier aggregation transmission is to be performed for the one service; or

wherein the target carrier aggregation parameter comprises at least one of: a first carrier activation list, a number of carriers for carrier aggregation, or second indication information; and

the first carrier activation list corresponds to a target service, the second indication information is used to indicate whether carrier aggregation transmission is to be performed for the target service, and the target service is all services or a specified service.