Method and device in communication node used for NR NTN communications

A first-type communication node for wireless communications, comprising:

• a first receiver, receiving first information;
• and
• a first transmitter, transmitting a first radio signal;
• wherein a length of a time interval between a start time for transmitting the first radio signal and a first reference time is equal to a sum of a first timing adjustment and a second timing adjustment, the first timing adjustment being one of X candidate timing adjustments, the X being a positive integer greater than 1;
• the second timing adjustment is used for determining a transmission timing of a radio signal transmitted before the first radio signal in time domain;
• a transmitter of the first radio signal determines the first timing adjustment out of the X candidate timing adjustments by itself, and the first information is used for determining the X candidate timing adjustments;
• and the first information is transmitted via an air interface.

A second-type communication node for wireless communications, comprising:

• a second transmitter, transmitting first information;
• and
• a second receiver, receiving a first radio signal;
• wherein a length of a time interval between a start time for transmitting the first radio signal and a first reference time is equal to a sum of a first timing adjustment and a second timing adjustment, the first timing adjustment being one of X candidate timing adjustments, the X being a positive integer greater than 1;
• the second timing adjustment is used for determining a transmission timing of a radio signal transmitted before the first radio signal in time domain;
• a transmitter of the first radio signal determines the first timing adjustment out of the X candidate timing adjustments by itself, and the first information is used for determining the X candidate timing adjustments;
• and the first information is transmitted via an air interface.