Method and device in nodes used for wireless communication

A second node for wireless communications, comprising:

• a second transmitter, transmitting first information and a first signaling, the first information being used to determine that a first PDCCH candidate and a second PDCCH candidate are associated with each other, and both the first PDCCH candidate and the second PDCCH candidate being used to carry the first signaling;
• and
• a second receiver, receiving a first PUSCH, and frequency-domain resources occupied by the first PUSCH belonging to a target frequency-domain resource pool;
• wherein the first signaling is used to determine the frequency-domain resources occupied by the first PUSCH from the target frequency-domain resource pool, the target frequency-domain resource pool is one of multiple frequency-domain resource pools, and there exist two orthogonal frequency-domain resource pools in the multiple frequency-domain resource pools that respectively overlap with a lowest-indexed CCE occupied by the first PDCCH candidate and a lowest-indexed CCE occupied by the second PDCCH candidate;
• a reference PDCCH candidate is one of the first PDCCH candidate or the second PDCCH candidate, and the reference PDCCH candidate is used to determine the target frequency-domain resource pool from the multiple frequency-domain resource pools.

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

• receiving first information and a first signaling, the first information being used to determine that a first PDCCH candidate and a second PDCCH candidate are associated with each other, and both the first PDCCH candidate and the second PDCCH candidate being used to carry the first signaling;
• and
• transmitting a first PUSCH, and frequency-domain resources occupied by the first PUSCH belonging to a target frequency-domain resource pool;
• wherein the first signaling is used to determine the frequency-domain resources occupied by the first PUSCH from the target frequency-domain resource pool, the target frequency-domain resource pool is one of multiple frequency-domain resource pools, and there exists two orthogonal frequency-domain resource pools in the multiple frequency-domain resource pools that respectively overlap with a lowest-indexed CCE occupied by the first PDCCH candidate and a lowest-indexed CCE occupied by the second PDCCH candidate;
• a reference PDCCH candidate is one of the first PDCCH candidate or the second PDCCH candidate, and the reference PDCCH candidate is used to determine the target frequency-domain resource pool from the multiple frequency-domain resource pools.