Method and device in nodes used for wireless communication

A second node for wireless communications, comprising:

• a third transmitter, transmitting a first signaling;
• and
• a third receiver, receiving a second signal;
• wherein the first signaling is used to indicate time-frequency resources occupied by a first signal, the first signaling is used to indicate radio resources occupied by the second signal, and time-frequency resources occupied by the first signal are used to determine radio resources occupied by a second signaling;
• a length of a time interval between an end time for receiving the second signaling and a start time for transmitting the second signal is equal to a first delay, and the end time for receiving the second signaling is earlier than the start time for transmitting the second signal;
• the first delay is not less than a reference delay, and the reference delay is related to an SCS of a subcarrier occupied by the second signal in frequency domain;
• the second signaling is used to determine information carried by the second signal, information carried by the second signal is the same as HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgement) information carried by the second signaling, and a transmitter of the second signaling is a node other than the second node;
• the first signaling carries DCI (Downlink Control Information), the first signal is transmitted through a PSSCH (Physical Sidelink Shared Channel), the second signaling is transmitted through a PSFCH (Physical Sidelink Feedback Channel), and the second signal is transmitted through a PUCCH (Physical Uplink Control Channel) or a PUSCH (Physical Uplink Shared Channel).

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

• receiving a first signaling;
• transmitting a first signal;
• receiving a second signaling;
• and
• transmitting a second signal;
• wherein the first signaling is used to determine time-frequency resources occupied by the first signal, the first signaling is used to determine radio resources occupied by the second signal, and time-frequency resources occupied by the first signal are used to determine radio resources occupied by the second signaling;
• a length of a time interval between an end time for receiving the second signaling and a start time for transmitting the second signal is equal to a first delay, and the end time for receiving the second signaling is earlier than the start time for transmitting the second signal;
• the first delay is not less than a reference delay, and the reference delay is related to an SCS of a subcarrier occupied by the second signal in frequency domain;
• the second signaling is used to determine information carried by the second signal, information carried by the second signal is the same as HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgement) information carried by the second signaling, and a transmitter of the first signaling is different from a transmitter of the second signaling;
• the first signaling carries DCI (Downlink Control Information), the first signal is transmitted through a PSSCH (Physical Sidelink Shared Channel), the second signaling is transmitted through a PSFCH (Physical Sidelink Feedback Channel), and the second signal is transmitted through a PUCCH (Physical Uplink Control Channel) or a PUSCH (Physical Uplink Shared Channel).