Method and device in nodes used for wireless communication

A second node for wireless communications, comprising:

• a second transmitter, transmitting a first signaling;
• and
• a second receiver, receiving a first signal on a target time-frequency resource block;
• wherein the first signaling carries a first source ID, and the first source ID is used to identify the second node;
• the target time-frequency resource block is a time-frequency resource block in a target resource pool, and the target resource pool comprises a plurality of time-frequency resource blocks;
• the first signaling indicates at least a latter of a first zone ID and a first candidate resource set, and the first candidate resource set comprises at least one time-frequency resource block;
• at least one of the first zone ID or a measurement corresponding to the first candidate resource set is used to determine whether the first candidate resource set is within the target resource pool.

A method in a first node for wireless communications, comprising:

• receiving M first-type signalings, M being a positive integer greater than 1;
• and
• transmitting a first signal on a target time-frequency resource block;
• wherein the M first-type signalings respectively carry M source IDs, the M source IDs are respectively used to identify M nodes, and any two of the M source IDs are different;
• the M first-type signalings respectively indicate M candidate resource sets, and any of the M candidate resource sets comprises at least one time-frequency resource block;
• one of the M candidate resource sets is within a target resource pool;
• the target resource pool comprises a plurality of time-frequency resource blocks, and the target time-frequency resource block is a time-frequency resource block in the target resource pool;
• a first signaling is one of the M first-type signalings, the first signaling indicates at least a latter of a first zone ID and a first candidate resource set, and the first candidate resource set is one of the M candidate resource sets;
• at least one of the first zone ID or a measurement corresponding to the first candidate resource set is used to determine whether the first candidate resource set is within the target resource pool.

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

• transmitting a first signaling;
• and
• receiving a first signal on a target time-frequency resource block;
• wherein the first signaling carries a first source ID, and the first source ID is used to identify the second node;
• the target time-frequency resource block is a time-frequency resource block in a target resource pool, and the target resource pool comprises a plurality of time-frequency resource blocks;
• the first signaling indicates at least a latter of a first zone ID and a first candidate resource set, and the first candidate resource set comprises at least one time-frequency resource block;
• at least one of the first zone ID or a measurement corresponding to the first candidate resource set is used to determine whether the first candidate resource set is within the target resource pool.