Reference signal sending method, terminal device, and access network device
The present disclosure relates to reference signal sending or receiving methods and systems, terminal devices, and access network devices. One example method includes sending, by a first device, first control information to a second device, where the first control information is used to indicate a first resource used by the first device to send a reference signal, and sending, by the first device, the reference signal to the second device on the first resource.
1. A reference signal sending method, comprising:
receiving, by a first device, auxiliary information from a second device, wherein the auxiliary information comprises one or more of a speed, an acceleration, or a movement direction of the second device;
determining, by the first device, a first resource based on the auxiliary information;
sending, by the first device, first control information to the second device, wherein the first control information indicates the first resource used by the first device to send a reference signal; and
sending, by the first device, the reference signal to the second device on the first resource.
2. The method according to claim 1 , wherein:
the first resource comprises a first time-frequency resource, and the sending, by the first device, the reference signal to the second device on the first resource comprises:
sending, by the first device, the reference signal to the second device on the first time-frequency resource; or
the first resource comprises a first time domain resource, and the sending, by the first device, the reference signal to the second device on the first resource comprises:
sending, by the first device, the reference signal to the second device on a time-frequency resource that comprises the first time domain resource and a predefined frequency domain resource; or
the first resource comprises a first frequency domain resource, and the sending, by the first device, the reference signal to the second device on the first resource comprises:
sending, by the first device, the reference signal to the second device on a time-frequency resource that comprises the first frequency domain resource and a predefined time domain resource.
3. The method according to claim 1 , wherein the first device comprises an access network device, and wherein the second device comprises a terminal device.
4. The method according to claim 3 , wherein the first control information is comprised in downlink control information.
5. The method according to claim 1 , wherein the first device comprises a first terminal device, and wherein the second device comprises a second terminal device.
6. The method according to claim 5 , wherein the first control information is comprised in sidelink control information.
7. The method according to claim 5 , wherein the first control information is received by the first terminal device from an access network device.
8. A reference signal receiving method, comprising:
sending, to an access network device by a second device, auxiliary information, wherein the auxiliary information comprises one or more of a speed, an acceleration, or a movement direction of the second device;
receiving, by the second device, first control information from a first device, wherein the first control information indicates a first resource used by the first device to send a reference signal, and the first resource is determined based on the auxiliary information; and
receiving, by the second device, the reference signal from the first device on the first resource.
9. The method according to claim 8 , wherein:
the first resource comprises a first time-frequency resource, and the receiving, by the second device, the reference signal from the first device on the first resource comprises:
receiving, by the second device, the reference signal from the first device on the first time-frequency resource; or
the first resource comprises a first time domain resource, and the receiving, by the second device, the reference signal from the first device on the first resource comprises:
receiving, by the second device, the reference signal from the first device on a time-frequency resource that comprises the first time domain resource and a predefined frequency domain resource; or
the first resource comprises a first frequency domain resource, and the receiving, by the second device, the reference signal from the first device on the first resource comprises:
receiving, by the second device, the reference signal from the first device on a time-frequency resource that comprises the first frequency domain resource and a predefined time domain resource.
10. The method according to claim 8 , wherein the first device comprises the access network device, and wherein the second device comprises a terminal device.
11. The method according to claim 10 , wherein the first control information is comprised in downlink control information.
12. The method according to claim 8 , wherein the first device comprises a first terminal device, and wherein the second device comprises a second terminal device.
13. The method according to claim 12 , wherein the first control information is comprised in sidelink control information.
14. The method according to claim 12 , wherein the first control information is received by the first terminal device from the access network device.
15. A first device, comprising:
at least one processor;
a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
receive auxiliary information from a second device, wherein the auxiliary information comprises one or more of a speed, an acceleration, or a movement direction of the second device;
determine a first resource based on the auxiliary information;
send first control information to the second device, wherein the first control information indicates the first resource used by the first device to send a reference signal; and
send the reference signal to the second device on the first resource.
16. The first device according to claim 15 , wherein:
the first resource comprises a first time-frequency resource, and that the sending the reference signal to the second device on the first resource comprises:
sending the reference signal to the second device on the first time-frequency resource; or
the first resource comprises a first time domain resource, and that the sending the reference signal to the second device on the first resource comprises:
sending the reference signal to the second device on a time-frequency resource that comprises the first time domain resource and a predefined frequency domain resource; or
the first resource comprises a first frequency domain resource, and that the sending the reference signal to the second device on the first resource comprises:
sending the reference signal to the second device on a time-frequency resource that comprises the first frequency domain resource and a predefined time domain resource.
17. The first device according to claim 15 , wherein the first device comprises an access network device, and wherein the second device comprises a terminal device.
18. The first device according to claim 17 , wherein the first control information is comprised in downlink control information.
19. The first device according to claim 15 , wherein the first device comprises a first terminal device, and wherein the second device comprises a second terminal device.
20. The first device according to claim 19 , wherein the first control information is comprised in sidelink control information.