US-20260129608-A1 - COMMUNICATION METHOD AND COMMUNICATION APPARATUS

Abstract

A communication method includes obtaining an identifier of a first resource. The first resource is used for transmission of a sidelink positioning reference signal. The identifier of the first resource is determined based on at least one of a length of a time domain resource available for transmission of the sidelink positioning reference signal, a start position of a time domain resource used for transmission of the sidelink positioning reference signal, or a length of the time domain resource used for transmission of the sidelink positioning reference signal. The communication method also includes sending the sidelink positioning reference signal on the first resource.

Inventors

• Chao Li
• Chuting YAO
• Jun Li
• Su Huang

Assignees

• HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date

20260507

Application Date

20251230

Priority Date

20230704

Claims (20)

1. 1 . A communication method, comprising: obtaining an identifier of a first resource, wherein the first resource is used for transmission of a sidelink positioning reference signal, and the identifier of the first resource is determined based on at least one of a length of a time domain resource available for transmission of the sidelink positioning reference signal, a start position of a time domain resource used for transmission of the sidelink positioning reference signal, or a length of the time domain resource used for transmission of the sidelink positioning reference signal; and sending the sidelink positioning reference signal on the first resource.
2. 2 . The communication method according to claim 1 , wherein obtaining the identifier of the first resource comprises: receiving first indication information, wherein the first indication information indicates the identifier of the first resource; or determining the identifier of the first resource.
3. 3 . The communication method according to claim 1 , wherein the length of the time domain resource available for transmission of the sidelink positioning reference signal is determined based on at least one of a length of a time domain resource used for transmission of a physical sidelink shared channel (PSSCH), a length of a time domain resource used for transmission of a physical sidelink control channel (PSCCH), a length of a time domain resource used for transmission of a physical sidelink feedback channel (PSFCH), and a length of a time domain resource used for transmission of a demodulation reference signal (DMRS).
4. 4 . The communication method according to claim 3 , wherein the length of the time domain resource available for transmission of the sidelink positioning reference signal satisfies any one of the following: Ma = l d - l PSCCH - X ⁢ 1 ; Ma = l d - l PSCCH - l DMRS - X ⁢ 2 ; or Ma = l d - X ⁢ 3 , wherein Ma represents the length of the time domain resource available for transmission of the sidelink positioning reference signal, l d represents the length of the time domain resource used for transmission of the PSSCH, l PSCCH represents the length of the time domain resource used for transmission of the PSCCH, l DMRS represents the length of the time domain resource used for transmission of the DMRS, and X1, X2, and X3 are constants.
5. 5 . The method according to claim 4 , wherein a value of X1 is 0, 1, 2, or 3; a value of X2 is 0 or 1; and a value of X3 is 0 or 1.
6. 6 . The communication method according to claim 1 , further comprising: receiving second indication information, wherein the second indication information indicates at least one of the start position of the time domain resource used for transmission of the sidelink positioning reference signal or the length of the time domain resource used for transmission of the sidelink positioning reference signal; or determining at least one of the start position of the time domain resource used for transmission of the sidelink positioning reference signal or the length of the time domain resource used for transmission of the sidelink positioning reference signal.
7. 7 . The communication method according to claim 1 , wherein the identifier of the first resource is obtained by encoding the length of the time domain resource available for transmission of the sidelink positioning reference signal.
8. 8 . The communication method according to claim 7 , wherein the identifier of the first resource satisfies any one of the following: n i ⁢ d = S start ; n i ⁢ d = S start + Ma ; or n i ⁢ d = S start + 2 ⁢ Ma - 1 , wherein n id represents the identifier of the first resource, S start represents the start position of the time domain resource used for transmission of the sidelink positioning reference signal, and Ma represents the length of the time domain resource available for transmission of the sidelink positioning reference signal.
9. 9 . The communication method according to claim 7 , wherein the first resource is further determined based on at least one of the a time domain resource used for transmission of a sidelink reference signal, a time domain resource used for transmission of sidelink feedback information, or a time domain resource used for transmission of a physical sidelink shared channel (PSSCH).
10. 10 . The communication method according to claim 9 , wherein obtaining the identifier of the first resource comprises: obtaining identifiers of N resources by encoding the length of the time domain resource available for transmission of the sidelink positioning reference signal, wherein N is an integer greater than 1; and determining the identifier of the first resource based on the identifiers of the N resources and a preset rule, wherein the preset rule indicates that the first resource is a continuous resource, and the first resource is free from including at least one of the time domain resource used for transmission of the sidelink reference signal, the time domain resource used for transmission of the sidelink feedback information, or the time domain resource used for transmission of the PSSCH.
11. 11 . The communication method according to claim 1 , wherein a value of the identifier of the first resource is W bits, the W bits comprise a first bit and a second bit, Wis an integer greater than 1, and the identifier of the first resource satisfies any one of the following: the first bit of the identifier of the first resource is related to the start position of the time domain resource used for transmission of the sidelink positioning reference signal, and the second bit of the identifier of the first resource is related to the length of the time domain resource used for transmission of the sidelink positioning reference signal; the second bit of the identifier of the first resource is related to the start position of the time domain resource used for transmission of the sidelink positioning reference signal, and the first bit of the identifier of the first resource is related to the length of the time domain resource used for transmission of the sidelink positioning reference signal; or the identifier of the first resource is obtained by jointly encoding the length of the time domain resource used for transmission of the sidelink positioning reference signal and the start position of the time domain resource used for transmission of the sidelink positioning reference signal.
12. 12 . The communication method according to claim 1 , further comprising: sending third indication information, wherein the third indication information indicates the first resource or the identifier of the first resource.
13. 13 . The communication method according to claim 12 , wherein the third indication information comprises at least one of the identifier of the first resource, a start position of the first resource in a time domain, a length of the first resource in the time domain, an end position of the first resource in the time domain, an offset of the first resource in frequency domain, or a comb size of the first resource in a frequency domain.
14. 14 . The communication method according to claim 13 , wherein the first resource comprises a first transmission resource and a second transmission resource, the first transmission resource and the second transmission resource are inconsecutive in the time domain, and the third indication information comprises the offset of the first resource in the frequency domain, and the offset of the first resource in the frequency domain comprises at least one of an offset of the first transmission resource in the frequency domain or an offset of the second transmission resource in the frequency domain.
15. 15 . A communication method, comprising: receiving, by a second communication apparatus, a first resource or an identifier of the first resource, wherein the identifier of the first resource is determined based on at least one of a length of a time domain resource available for transmission of a sidelink positioning reference signal, a start position of a time domain resource used for transmission of the sidelink positioning reference signal, or a length of the time domain resource used for transmission of the sidelink positioning reference signal; and receiving, by the second communication apparatus, the sidelink positioning reference signal on the first resource.
16. 16 . The communication method according to claim 15 , further comprising: obtaining, by the second communication apparatus, positioning-related information based on the sidelink positioning reference signal.
17. 17 . The communication method according to claim 15 , wherein the length of the time domain resource available for transmission of the sidelink positioning reference signal is determined based on at least one of a length of a time domain resource used for transmission of a physical sidelink shared channel (PSSCH), a length of a time domain resource used for transmission of a physical sidelink control channel (PSCCH), a length of a time domain resource used for transmission of a physical sidelink feedback channel (PSFCH), or a length of a time domain resource used for transmission of a demodulation reference signal (DMRS).
18. 18 . The method according to claim 17 , wherein the length of the time domain resource available for transmission of the sidelink positioning reference signal satisfies any one of the following: Ma = l d - l PSCCH - X ⁢ 1 ; Ma = l d - l PSCCH - l DMRS - X ⁢ 2 ; or Ma = l d - X ⁢ 3 , wherein Ma represents the length of the time domain resource available for transmission of the sidelink positioning reference signal, l d represents the length of the time domain resource used for transmission of the PSSCH, l PSCCH represents the length of the time domain resource used for transmission of the PSCCH, l DMRS represents the length of the time domain resource used for transmission of the DMRS, and X1, X2, and X3 are constants.
19. 19 . The method according to claim 18 , wherein a value of X1 is 0, 1, 2, or 3; a value of X2 is 0 or 1; and a value of X3 is 0 or 1.
20. 20 . An apparatus, comprising: at least one processor; and at least one memory coupled to the at least one processor, the at least one memory storing programming instructions that, when executed by the at least one processor, cause the apparatus to: obtain an identifier of a first resource, wherein the first resource is used for transmission of a sidelink positioning reference signal, and the identifier of the first resource is determined based on at least one of a length of a time domain resource available for transmission of the sidelink positioning reference signal, a start position of a time domain resource used for transmission of the sidelink positioning reference signal, or a length of the time domain resource used for transmission of the sidelink positioning reference signal; and send the sidelink positioning reference signal on the first resource.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN 2024/103501, filed on Jul. 4, 2024, which claims priority to Chinese Patent Application No. 202310816526.6, filed on Jul. 4, 2023 and Chinese Patent Application No. 202310986421.5, filed on Aug. 4, 2023 and Chinese Patent Application No. 202311258445.5, filed on Sep. 26, 2023. All of the aforementioned patent applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the communication field, and more specifically, to a communication method and a communication apparatus. BACKGROUND In daily life and applications, location information has become increasingly important basic information. Applications such as a navigation service and a location based service (LBS) need to provide corresponding services for users based on location information of the users. Currently, a global navigation satellite system (GNSS) is a common solution for determining location information. Positioning precision of the GNSS may not satisfy requirements of some applications that have high precision requirements. To resolve this problem, a sidelink positioning technology is proposed in the industry. However, how to determine a resource used for transmission of a sidelink positioning reference signal is a problem of concern in the industry. SUMMARY This application provides a communication method and a communication apparatus, to flexibly indicate a resource of a sidelink positioning reference signal. According to a first aspect, a communication method is provided. The method may be performed by a communication apparatus. The communication apparatus may be a communication device (for example, a terminal device), or may be a component (for example, a chip or a circuit) of the communication device. This is not limited. For ease of description, the following uses an example in which the method is performed by a first communication apparatus for description. The method may include: The first communication apparatus obtains an identifier of a first resource, where the first resource is used for transmission of a sidelink positioning reference signal, and the identifier of the first resource is determined based on at least one of the following: a length of a time domain resource available for transmission of the sidelink positioning reference signal, a start position of a time domain resource used for transmission of the sidelink positioning reference signal, and a length of the time domain resource used for transmission of the sidelink positioning reference signal; and the first communication apparatus sends the sidelink positioning reference signal on the first resource. According to the foregoing technical solution, the first communication apparatus may obtain the identifier of the first resource, determine the first resource based on the identifier of the first resource, and send the reference signal on the first resource. The identifier of the first resource may be determined based on one or more of the length of the time domain resource available for transmission of the reference signal, the start position of the time domain resource used for transmission of the reference signal, and the length of the time domain resource used for transmission of the reference signal. In this way, for example, an association between an identifier of a resource used for transmission of a reference signal and a start position and a length of the resource may be established, or a relationship between an identifier of a resource used for transmission of a reference signal and a length of a time domain resource available for transmission of the reference signal may be established. Therefore, the resource of the reference signal can be determined and indicated, and the resource of the reference signal can be flexibly indicated. In addition, this manner may be applied to various communication scenarios. With reference to the first aspect, in some implementations of the first aspect, that the first communication apparatus obtains the identifier of the first resource includes: The first communication apparatus receives first indication information, where the first indication information indicates the identifier of the first resource; and the first communication apparatus determines the identifier of the first resource. According to the foregoing technical solution, the first communication apparatus may receive the identifier of the first resource from another apparatus, or may determine the identifier of the first resource. This manner is flexible. With reference to the first aspect, in some implementations of the first aspect, the length of the time domain resource available for transmission of the sidelink positioning reference signal is determined based on at least one of the following: a length of a time domain resource used for transmission of a physical sidelink shared channel PSSCH, a len