Method and device in nodes used for wireless communication

1. A first node for wireless communications, comprising: a first receiver, receiving a first signaling, the first signaling indicating a first resource pool and X1 resource sub-pools, any of the X1 resource sub-pools belonging to the first resource pool, X1 being a positive integer greater than 1; a second receiver, determining a candidate resource set out of the first resource pool, the candidate resource set comprising at least one candidate time-frequency resource block; and a first transmitter, transmitting a target signal on a target time-frequency resource block, the target time-frequency resource block being a candidate time-frequency resource block comprised in the candidate resource set; wherein the candidate resource set comprises at least one candidate resource subset, a target resource subset is one of the at least one candidate resource subset comprised in the candidate resource set; a candidate time-frequency resource block in the target resource subset belongs to a target resource sub-pool, and the target resource sub-pool is one of the X1 resource sub-pools; the first signaling indicates a first priority, and the first priority is used to determine X1 first-type thresholds; the X1 resource sub-pools respectively correspond to the X1 first-type thresholds; a target threshold is a first-type threshold corresponding to the target resource sub-pool among the X1 first-type thresholds, and the target threshold is used to determine the target resource subset out of the target resource sub-pool.

2. The first node according to claim 1 , comprising: the second receiver, monitoring a second signaling in the first resource pool, the second signaling indicating a second priority and a first time-frequency resource block; and the second receiver, measuring in the first time-frequency resource block, the first time-frequency resource block belonging to the target resource sub-pool; wherein the first priority, the second priority and the target resource sub-pool are used together to determine the target threshold out of the X1 first-type thresholds; the first time-frequency resource block is associated with a second time-frequency resource block, the second time-frequency resource block belongs to the target resource sub-pool, and the first time-frequency resource block and the second time-frequency resource block are orthogonal in time domain; a size relationship of a measurement result in the first time-frequency resource block and the target threshold is used to determine whether the second time-frequency resource block belongs to the target resource subset.

3. The first node according to claim 2 , wherein the X1 first-type threshold belong to one of multiple first-type threshold lists, the first priority and the second priority are used together to determine a first-type threshold list to which the X1 first-type thresholds belong out of the multiple first-type threshold lists, and the target resource sub-pool is used to determine the target threshold out of the X1 first-type thresholds; or, the X1 first-type thresholds respectively belong to X1 second-type threshold lists, the target threshold belongs to one of the X1 second-type threshold lists, the target resource sub-pool is used to determine a second-type threshold list to which the target threshold belongs out of the X1 second-type threshold lists, and the first priority and the second priority are used together to determine the target threshold out of a second-type threshold list to which the target threshold belongs; or, a first reference threshold is one of multiple reference thresholds, the first reference threshold is one of the X1 first-type thresholds, the first priority and the second priority are used together to determine the first reference threshold out of the multiple reference thresholds, the target resource sub-pool is used to determine a first offset, and the first reference threshold and the first offset are used together to determine the target threshold.

4. The first node according to claim 3 , wherein the X1 resource sub-pools comprise a first resource sub-pool and a second resource sub-pool; a first threshold is a first-type threshold corresponding to the first resource sub-pool among the X1 first-type thresholds, and a second threshold is a first-type threshold corresponding to the second resource sub-pool among the X1 first-type thresholds, and the first threshold is greater than the second threshold; the first threshold is used to determine a first candidate resource subset out of the first resource sub-pool, and the first candidate resource subset belongs to the candidate resource set.

5. The first node according to claim 4 , wherein the second threshold is used to determine a second candidate resource subset out of the second resource sub-pool; the second candidate resource subset belongs to the candidate resource set; a former of the first candidate resource subset and the second candidate resource subset is preferentially used to select the target time-frequency resource block.

6. The first node according to claim 4 , wherein the first candidate resource subset comprises Q1 candidate time-frequency resource blocks, Q1 being a positive integer greater than 1; a size relationship of Q1 and a first value is used to determine whether the candidate resource set is orthogonal to the second resource sub-pool.

7. A method in a first node for wireless communications, comprising: receiving a first signaling, the first signaling indicating a first resource pool and X1 resource sub-pools, any of the X1 resource sub-pools belonging to the first resource pool, X1 being a positive integer greater than 1; determining a candidate resource set out of the first resource pool, the candidate resource set comprising at least one candidate time-frequency resource block; and transmitting a target signal on a target time-frequency resource block, the target time-frequency resource block being a candidate time-frequency resource block comprised in the candidate resource set; wherein the candidate resource set comprises at least one candidate resource subset, a target resource subset is one of the at least one candidate resource subset comprised in the candidate resource set; a candidate time-frequency resource block in the target resource subset belongs to a target resource sub-pool, and the target resource sub-pool is one of the X1 resource sub-pools; the first signaling indicates a first priority, and the first priority is used to determine X1 first-type thresholds; the X1 resource sub-pools respectively correspond to the X1 first-type thresholds; a target threshold is a first-type threshold corresponding to the target resource sub-pool among the X1 first-type thresholds, and the target threshold is used to determine the target resource subset out of the target resource sub-pool.

8. The method according to claim 7 , comprising: monitoring a second signaling in the first resource pool, the second signaling indicating a second priority and a first time-frequency resource block; and measuring in the first time-frequency resource block, the first time-frequency resource block belonging to the target resource sub-pool; wherein the first priority, the second priority and the target resource sub-pool are used together to determine the target threshold out of the X1 first-type thresholds; the first time-frequency resource block is associated with a second time-frequency resource block, the second time-frequency resource block belongs to the target resource sub-pool, and the first time-frequency resource block and the second time-frequency resource block are orthogonal in time domain; a size relationship of a measurement result for the first time-frequency resource block and the target threshold is used to determine whether the second time-frequency resource block belongs to the target resource subset.

9. The method according to claim 8 , wherein the X1 first-type thresholds belong to one of multiple first-type threshold lists, the first priority and the second priority are used together to determine a first-type threshold list to which the X1 first-type thresholds belong out of the multiple first-type threshold lists, and the target resource sub-pool is used to determine the target threshold out of the X1 first-type thresholds; or, the X1 first-type thresholds respectively belong to X1 second-type threshold lists, the target threshold belongs to one of the X1 second-type threshold lists, the target resource sub-pool is used to determine a second-type threshold list to which the target threshold belongs out of the X1 second-type threshold lists, and the first priority and the second priority are used together to determine the target threshold out of a second-type threshold list to which the target threshold belongs; or, a first reference threshold is one of multiple reference thresholds, the first reference threshold is one of the X1 first-type thresholds, the first priority and the second priority are used together to determine the first reference threshold out of the multiple reference thresholds, the target resource sub-pool is used to determine a first offset value, and the first reference threshold and the first offset value are used together to determine the target threshold.

10. The method according to claim 7 , wherein the X1 resource sub-pools comprise a first resource sub-pool and a second resource sub-pool; a first threshold is a first-type threshold corresponding to the first resource sub-pool among the X1 first-type thresholds, and a second threshold is a first-type threshold corresponding to the second resource sub-pool among the X1 first-type thresholds, and the first threshold is greater than the second threshold; the first threshold is used to determine a first candidate resource subset out of the first resource sub-pool, and the first candidate resource subset belongs to the candidate resource set.

11. The method according to claim 10 , wherein the second threshold is used to determine a second candidate resource subset out of the second resource sub-pool; the second candidate resource subset belongs to the candidate resource set; a former of the first candidate resource subset and the second candidate resource subset is preferentially used to select the target time-frequency resource block.

12. The method according to claim 10 , wherein the first candidate resource subset comprises Q1 candidate time-frequency resource blocks, Q1 being a positive integer greater than 1; a size relationship of Q1 and a first value is used to determine whether the candidate resource set is orthogonal to the second resource sub-pool.