US-12628128-B2 - Communication method and communication apparatus

Abstract

A communication method includes receiving coordination information. The coordination information is used by a first sidelink device to determine a first resource set. The first resource set is used by the first sidelink device to send information. The communication method also includes determining that the coordination information includes one or more of information about a second resource set recommended to the first sidelink device, information about a third resource set scheduled to the first sidelink device, information about a fourth resource set expected to be excluded by the first sidelink device, a coordination parameter or a measurement result, where the coordination parameter or the measurement result is used by the first sidelink device to determine the first resource set, or indication information, where the indication information instructs the first sidelink device to determine the first resource set.

Inventors

• Lei Dong
• Hongjia Su
• Wenting Guo
• Chang HE
• Lei Lu

Assignees

• HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date

20260512

Application Date

20230413

Claims (16)

1. 1 . A communication method, comprising: receiving coordination information, wherein the coordination information is used by a first sidelink device to determine a first resource set, and the first resource set is used by the first sidelink device to send sidelink information; receiving first indication information; and determining, based on the first indication information, that the coordination information comprises one or more of: information about a second resource set recommended to the first sidelink device; information about a third resource set scheduled to the first sidelink device; information about a fourth resource set expected to be excluded by the first sidelink device; a coordination parameter or a measurement result, wherein the coordination parameter or the measurement result is used by the first sidelink device to determine the first resource set; or second indication information, wherein the second indication information indicates the first sidelink device to determine the first resource set, wherein the coordination information is determined as comprising the information about the second resource set recommended by a second sidelink device to the first sidelink device; the first resource set is used by the first sidelink device to send sidelink information to a third sidelink device other than the second sidelink device on the first resource set; and the communication method further comprises: determining an intersection set of the second resource set and a fifth resource set, wherein the fifth resource set is a resource set determined by the first sidelink device through monitoring.
2. 2 . The communication method according to claim 1 , wherein the fourth resource set is used by the first sidelink device to exclude some or all resources in the fourth resource set in response to the first sidelink device determining the first resource set for sending information to another sidelink device.
3. 3 . The communication method according to claim 1 , wherein the coordination information is determined as comprising the information about the fourth resource set expected by the second sidelink device to be excluded by the first sidelink device; and the communication method further comprises: reporting, by the first sidelink device, a sixth resource set to a higher layer of the first sidelink device, wherein the sixth resource set is a resource set obtained by the first sidelink device by excluding some or all resources in at least one of the fourth resource set or a reserved resource, and the reserved resource is a resource determined by the first sidelink device through autonomous monitoring.
4. 4 . The communication method according to claim 1 , wherein the coordination information comprises the information about the third resource set scheduled to the first sidelink device, and the first sidelink device selects some or all resources in the third resource set as resources in the first resource set, to send sidelink information.
5. 5 . The communication method according to claim 1 , wherein the first indication information and the coordination information are carried in sidelink control information (SCI).
6. 6 . A communication method, comprising: receiving first indication information and trigger information, wherein the trigger information is used to trigger a coordination procedure, and the first indication information comprises a bitmap or field value that explicitly maps to a type of information included in the trigger information; and indicating, based on the first indication information, that the trigger information comprises one or more of: second indication information, wherein the second indication information indicates content of coordination information; third indication information, wherein the third indication information is used to identify the trigger information; or a trigger parameter, wherein the trigger parameter is used by a second sidelink device to determine the coordination information, wherein the indicating comprises decoding the first indication information to identify whether the trigger information contains the second indication information, the third indication information, or the trigger parameter.
7. 7 . The communication method according to claim 6 , wherein the content of the coordination information comprises one or more of: information about a second resource set recommended to a first sidelink device; information about a third resource set scheduled to the first sidelink device; information about a fourth resource set expected to be excluded by the first sidelink device; a coordination parameter or a measurement result, wherein the coordination parameter or the measurement result is used by the first sidelink device to determine a first resource set; or fourth indication information, wherein the fourth indication information indicates the first sidelink device to determine the first resource set, wherein the first resource set is used by the first sidelink device to send sidelink information on the first resource set.
8. 8 . The communication method according to claim 6 , wherein the trigger parameter comprises at least one of a quantity of sub-channels, a size of a selection window, a size of a monitoring window, a periodicity, or priority information.
9. 9 . A communication apparatus, comprising: a processor; and a memory having instructions stored thereon that, when executed by the processor, cause the communication apparatus to: receive coordination information, wherein the coordination information is used by a first sidelink device to determine a first resource set, and the first resource set is used by the first sidelink device to send sidelink information; receive first indication information; and determine, based on the first indication information, that the coordination information comprises one or more of: information about a second resource set recommended to the first sidelink device; information about a third resource set scheduled to the first sidelink device; information about a fourth resource set expected to be excluded by the first sidelink device; a coordination parameter or a measurement result, wherein the coordination parameter or the measurement result is used by the first sidelink device to determine the first resource set; or second indication information, wherein the second indication information indicates the first sidelink device to determine the first resource set, wherein the coordination information is determined as comprising the information about the second resource set recommended by a second sidelink device to the first sidelink device; the first resource set is used by the first sidelink device to send sidelink information to a third sidelink device other than the second sidelink device on the first resource set; and the communication apparatus is further caused to: determine an intersection set of the second resource set and a fifth resource set, wherein the fifth resource set is a resource set determined by the first sidelink device through monitoring.
10. 10 . The communication apparatus according to claim 9 , wherein the fourth resource set is used by the first sidelink device to exclude some or all resources in the fourth resource set in response to the first sidelink device determining the first resource set for sending information to another sidelink device.
11. 11 . The communication apparatus according to claim 9 , wherein the coordination information is determined as comprising the information about the fourth resource set expected by the second sidelink device to be excluded by the first sidelink device; and the communication apparatus is further caused to: report a sixth resource set to a higher layer of the first sidelink device, wherein the sixth resource set is a resource set obtained by the first sidelink device by excluding some or all resources in at least one of the fourth resource set or a reserved resource, and the reserved resource is a resource determined by the first sidelink device through autonomous monitoring.
12. 12 . The communication apparatus according to claim 9 , wherein the coordination information comprises the information about the third resource set scheduled to the first sidelink device, and the first sidelink device selects some or all resources in the third resource set as resources in the first resource set, to send sidelink information.
13. 13 . The communication apparatus according to claim 9 , wherein the first indication information and the coordination information are carried in sidelink control information (SCI).
14. 14 . A communication apparatus, comprising: a processor; and a memory having instructions stored thereon that, when executed by the processor, cause the communication apparatus to: receive first indication information and trigger information, wherein the trigger information is used to trigger a coordination procedure, and the first indication information comprises a bitmap or field value that explicitly maps to a type of information included in the trigger information; and indicate, based on the first indication information, that the trigger information comprises one or more of: second indication information, wherein the second indication information indicates content of coordination information; third indication information, wherein the third indication information is used to identify the trigger information; or a trigger parameter, wherein the trigger parameter is used by a second sidelink device to determine the coordination information, wherein the indicating comprises decoding the first indication information to identify whether the trigger information contains the second indication information, the third indication information, or the trigger parameter.
15. 15 . The communication apparatus according to claim 14 , wherein the content of the coordination information comprises one or more of: information about a second resource set recommended to a first sidelink device; information about a third resource set scheduled to the first sidelink device; information about a fourth resource set expected to be excluded by the first sidelink device; a coordination parameter or a measurement result, wherein the coordination parameter or the measurement result is used by the first sidelink device to determine a first resource set; or fourth indication information, wherein the fourth indication information indicates the first sidelink device to determine the first resource set, wherein the first resource set is used by the first sidelink device to send sidelink information on the first resource set.
16. 16 . The communication apparatus according to claim 14 , wherein the trigger parameter comprises at least one of a quantity of sub-channels, a size of a selection window, a size of a monitoring window, a periodicity, or priority information.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2020/121555, filed on Oct. 16, 2020, 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 communication method and a communication apparatus. BACKGROUND An internet of vehicles technology for vehicle-to-everything (V2X) communication is proposed. The V2X communication refers to communication between a vehicle and anything outside, including vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure (V2I) communication, and vehicle-to-network (V2N) communication. In an internet of vehicles system, when terminal devices communicate with each other, two resource allocation modes are usually used. One is that a network device schedules a sidelink transmission resource, and the other is that the terminal device autonomously selects a resource. In the autonomous resource selection mode, a transmission resource of a sending terminal device does not depend on a base station. In the autonomous resource selection mode, the sending terminal and a coordinating terminal need to coordinate with each other. However, there is no effective solution currently. The terminal devices may need to continuously and repeatedly perform monitoring or start a related procedure, causing a waste of resources and unnecessary interference. SUMMARY This application provides a communication method and a communication apparatus, to optimize an assistance procedure between terminal devices in an autonomous selection mode. According to a first aspect, a communication method is provided. The method includes: receiving coordination information, where the coordination information is used by a first sidelink device to determine a first resource set based on the coordination information, and the first resource set is used by the first sidelink device to send information on the first resource set; and determining that the coordination information includes one or more of the following information: information about a second resource set recommended to the first sidelink device, information about a third resource set scheduled to the first sidelink device, information about a fourth resource set expected to be excluded by the first sidelink device, a coordination parameter or a measurement result used by the first sidelink device to determine the first resource set, and indication information indicating the first sidelink device to determine the first resource set. A meaning of the information about the second resource set recommended to the first sidelink device is: informing, notifying, or indicating the first sidelink device that a resource in the second resource set is a resource that can be selected by the first sidelink device. The first sidelink device may select the resource in the second resource set to send data or control information, or may not select the resource in the second resource set. A meaning of the information about the third resource set scheduled to the first sidelink device is: informing, notifying, or indicating the first sidelink device to send data or control information by using a resource in the third resource set. The first sidelink device directly uses the resource in the third resource set to send information. A meaning of the fourth resource set expected to be excluded by the first sidelink device is: The first sidelink device is not recommended to select a resource in the fourth resource set to send information. The first sidelink device may exclude some or all resources in the fourth resource set, or the first sidelink device may not exclude the resource in the fourth resource set. The coordination parameter or the measurement result may include, for example, measured RSRP, a channel state information (CSI) feedback result, location information, power, a speed, a path loss, and a priority. The indication information indicating the first sidelink device to determine the first resource set may be indication information for resource retransmission or indication information for resource reselection. In this embodiment of this application, a sidelink device that receives the coordination information can identify content of the coordination information, and therefore can perform a coordination procedure based on the identified content of the coordination information, to optimize the coordination procedure. In a possible implementation of the first aspect, the method further includes: receiving first indication information, and determining the content of the coordination information based on the first indication information. The first indication information and the coordination information may be carried in SCI of a same level, or the first indication information and the coordination information may be carried in SCI of different l