Method and device in nodes used for wireless communication

1. A second communication node for wireless communications, comprising:

a second receiver, receiving a first signaling, the first signaling being used to determine a first identity (ID) and a first distance, the first ID is a zone ID;

a third receiver, receiving a first signal, the first signaling also being used to determine time-frequency resources occupied by the first signal; and

a third transmitter, transmitting a second signal, or cancelling transmission of the second signal, the second signaling being used to indicate that the first signal is not correctly received by the third receiver;

wherein the first ID is used to determine X zones, X being a positive integer greater than 1, and any two of the X zones are orthogonal; the X zones respectively comprise X characteristic geographic locations; a geographic location of the second communication node is used to determine a reference geographic location; when a distance between one of the X characteristic geographic locations and the reference geographic location is not greater than the reference distance and the first signal is not correctly received, the second signal is transmitted, otherwise the second signal is cancelled.

2. The second communication node according to claim 1 , wherein a first sequence is used to generate the second signal; at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used to determine time-frequency resources occupied by the second signal, or at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used to determine the first sequence, or at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used to determine time-frequency resources occupied by the second signal and the first sequence; the first sequence is a Low Peak to Average Power Ratio (PAPR) sequence, a length of the first sequence is equal to a positive integral multiple of 12, the first sequence sequentially goes through Mapping To Physical Resources, OFDM Baseband Signal Generation, and Modulation and Upconversion to generate the second signal.

3. The second communication node according to claim 1 , wherein the second receiver receives second information; wherein the second information is used to determine a first length, a first width, a first longitude reusing factor and a first latitude reusing factor, the first length and the first width are used to determine Y zones, and any of the X zones is one of the Y zones, Y being a positive integer greater than 1; and the first ID, the first longitude reusing factor and the first latitude reusing factor are used together to determine the X zones out of the Y zones.

4. The second communication node according to claim 3 , wherein the second information comprises partial or all fields in Sidelink Control Information (SCI), and the second information is transmitted through a Physical Sidelink Shared Channel (PSSCH); or the second information comprises all or partial fields in an Information Element (IE) in a Radio Resource Control (RRC) signaling.

5. The second communication node according to claim 1 , wherein the X characteristic geographic locations are respectively X predefined geographic locations located within the X zones, or the X characteristic geographic locations are respectively X geographic locations located within the X zones closest to the reference geographic location.

6. The second communication node according to claim 1 , wherein the first signaling carries partial or all fields in SCI, and the first signaling is transmitted through a Physical Sidelink Control Channel (PSCCH); the first signaling is used to indirectly indicate the first ID and the first distance, and the first signaling is also used to explicitly indicate time-frequency resources occupied by the first signal.

7. The second communication node according to claim 1 , wherein the first ID is a zone ID, the first ID is a non-negative integer, the first distance is a geodesic distance, and the first distance is measured by meter (m).

8. The second communication node according to claim 1 , wherein the first signal is transmitted through a Physical Sidelink Shared Channel (PSSCH), and all or part of a Transport Block (TB) is used to generate the first signal; the second signal is transmitted through a Physical Sidelink Feedback Channel (PSFCH), and the second signal carries a Hybrid Automatic Repeat Request (HARQ) Non-Acknowledge (NACK) feedback; when the second signal is detected, a receiver of the second signal assumes that the first signal is not correctly received; otherwise a receiver of the second signal assumes that the first signal is correctly received.

9. The second communication node according to claim 1 , wherein any of the X zones is one of zones into which the surface of the earth is divided from coordinate points (0,0) in the WGS84 model (Military Standard WGS84 Metric MIL-STD-2401 (11 Jan. 1994): “Military Standard Department of Defence World Geodetic System (WGS)”) with equal latitude interval and equal longitude interval; any of the X zones is geographically continuous and occupies a contiguous latitude range and a contiguous longitude range; and an ID of any of the X zones is equal to the first ID.

10. The second communication node according to claim 1 , wherein a geographic location of the second communication node is a current geographic location of the second communication node, and the reference geographic location and a geographic location of the second communication node are a same geographic location.

11. A method in a second communication node for wireless communications, comprising:

receiving a first signaling, the first signaling being used to determine a first ID and a first distance, the first ID is a zone ID;

receiving a first signal, the first signaling also being used to determine time-frequency resources occupied by the first signal; and

transmitting a second signal, or cancelling transmission of the second signal, the second signal being used to indicate that the first signal is not correctly received;

wherein the first ID is used to determine X zones, X being a positive integer greater than 1, and any two of the X zones are orthogonal; the X zones respectively comprise X characteristic geographic locations; a geographic location of the second communication node is used to determine a reference geographic location; when a distance between one of the X characteristic geographic locations and the reference geographic location is not greater than the reference distance and the first signal is not correctly received, the second signal is transmitted, otherwise the second signal is cancelled.

12. The method in a second communication node according to claim 11 , wherein a first sequence is used to generate the second signal; at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used to determine time-frequency resources occupied by the second signal, or at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used to determine the first sequence, or at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used to determine time-frequency resources occupied by the second signal and the first sequence; the first sequence is a PAPR sequence, a length of the first sequence is equal to a positive integral multiple of 12, the first sequence sequentially goes through Mapping To Physical Resources, OFDM Baseband Signal Generation, and Modulation and Upconversion to generate the second signal.

13. The method in a second communication node according to claim 11 , comprising:

receiving second information;

wherein the second information is used to determine a first length, a first width, a first longitude reusing factor and a first latitude reusing factor, the first length and the first width are used to determine Y zones, and any of the X zones is one of the Y zones, Y being a positive integer greater than 1; the first ID, the first longitude reusing factor and the first latitude reusing factor are used together to determine the X zones out of the Y zones.

14. The method in a second communication node according to claim 13 , wherein the second information comprises partial or all fields in SCI, and the second information is transmitted through a PSSCH; or the second information comprises all or partial fields in an IE in an RRC signaling.

15. The method in a second communication node according to claim 11 , wherein the X characteristic geographic locations are respectively X predefined geographic locations located within the X zones, or the X characteristic geographic locations are respectively X geographic locations located within the X zones closest to the reference geographic location.

16. The method in a second communication node according to claim 11 , wherein the first signaling carries partial or all fields in SCI, and the first signaling is transmitted through a PSCCH; the first signaling is used to indirectly indicate the first ID and the first distance, and the first signaling is also used to explicitly indicate time-frequency resources occupied by the first signal.

17. The method in a second communication node according to claim 11 , wherein the first ID is a zone ID, the first ID is a non-negative integer, the first distance is a geodesic distance, and the first distance is measured by m.

18. The method in a second communication node according to claim 11 , wherein the first signal is transmitted through a PSSCH, and all or part of a TB is used to generate the first signal; the second signal is transmitted through a PSFCH, and the second signal carries a HARQ NACK feedback; when the second signal is detected, a receiver of the second signal assumes that the first signal is not correctly received; otherwise a receiver of the second signal assumes that the first signal is correctly received.

19. The method in a second communication node according to claim 11 , wherein any of the X zones is one of zones into which the surface of the earth is divided from coordinate points (0,0) in the WGS84 model (Military Standard WGS84 Metric MIL-STD-2401 (11 Jan. 1994): “Military Standard Department of Defence World Geodetic System (WGS)”) with equal latitude interval and equal longitude interval; any of the X zones is geographically continuous and occupies a contiguous latitude range and a contiguous longitude range; and an ID of any of the X zones is equal to the first ID.

20. The method in a second communication node according to claim 11 , wherein a geographic location of the second communication node is a current geographic location of the second communication node, and the reference geographic location and a geographic location of the second communication node are a same geographic location.