Method and device for use in communication node for wireless communication

A second communication node for wireless communications, comprising:

• a second receiver, receiving a first sequence;
• a third transmitter, transmitting first information, the first information being used to determine partial candidate time length(s) among X candidate time lengths, X being a positive integer greater than 1;
• and
• a third receiver, receiving a second sequence and determining whether a second radio signal is transmitted;
• wherein a length of a time interval between a time for transmitting the first sequence and a time for transmitting the second sequence is not less than a target time length;
• a first time length is equal to one of the X candidate time lengths, and the target time length is not greater than the first time length;
• when the first time length is greater than 0, a transmitter of the first sequence randomly selects the target time length between 0 and the first time length;
• when the first time length is equal to 0, the target time length is equal to 0;
• whether the second radio signal is transmitted is used to determine the first time length out of the X candidate time lengths;
• the first information is transmitted through a PDSCH, and a MsgB-RNTI is used to generate an initial value of a generator of a scrambling sequence of the PDSCH carrying the first information.

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

• transmitting a first sequence;
• receiving first information, the first information being used to determine partial candidate time length(s) among X candidate time lengths, X being a positive integer greater than 1;
• and
• transmitting a second sequence and determining whether to transmit a second radio signal;
• wherein a length of a time interval between a time for transmitting the first sequence and a time for transmitting the second sequence is not less than a target time length;
• a first time length is equal to one of the X candidate time lengths, and the target time length is not greater than the first time length;
• when the first time length is greater than 0, the first communication node randomly selects the target time length between 0 and the first time length;
• when the first time length is equal to 0, the target time length is equal to 0;
• whether the second radio signal is transmitted is used to determine the first time length out of the X candidate time lengths;
• the first information is transmitted through a PDSCH, and a MsgB-RNTI is used to generate an initial value of a generator of a scrambling sequence of the PDSCH carrying the first information.