Method and device in node for wireless communication

A second node for wireless communication, comprising:

• a second transmitter, transmitting first information and second information, the second information being used to determine a first time-frequency resource group;
• and
• a second receiver, monitoring a first radio signal in the first time-frequency resource group;
• wherein the first information is used to determine whether the second node and a target receiver of the second information belong to a same serving cell;
• the first information is used to judge whether the target receiver of the second information performs a first channel sensing;
• when the result of the judging action is no, the first radio signal is transmitted in the first time-frequency resource group;
• when the result of the judging action is yes, the first channel sensing is used to determine whether the first radio signal is transmitted in the first time-frequency resource group.

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

• receiving first information and second information, the second information being used to determine a first time-frequency resource group;
• and
• judging whether to perform a first channel sensing;
• when the result of the judging action is no, transmitting a first radio signal in the first time-frequency resource group, and when the result of the judging action is yes, performing the first channel sensing to determine whether to transmit a first radio signal in the first time-frequency resource group;
• when the result of the determining action is yes, transmitting the first radio signal in the first time-frequency resource group, when the result of the determining action is no, dropping transmission of the first radio signal in the first time-frequency resource group;
• wherein the first information is used to determine whether the first node and a transmitter of the second information belong to a same serving cell, and the first information is used to judge whether to perform the first channel sensing.

A method used in a second node for wireless communication, comprising:

• transmitting first information and second information, the second information being used to determine a first time-frequency resource group;
• monitoring a first radio signal in the first time-frequency resource group;
• wherein the first information is used to determine whether the second node and a target receiver of the second information belong to a same serving cell;
• the first information is used to judge whether the target receiver of the second information performs a first channel sensing;
• when the result of the judging action is no, the first radio signal is transmitted in the first time-frequency resource group;
• when the result of the judging action is yes, the first channel sensing is used to determine whether the first radio signal is transmitted in the first time-frequency resource group.