Method and device for sidelink wireless communication

A second node for wireless communications, comprising:

• a second transmitter, transmitting a fourth radio signal and a second radio signal set, the fourth radio signal comprising first information;
• wherein the first information comprises a node ID group and a first configuration;
• the node ID group comprises Q node IDs, Q being a positive integer greater than 1;
• the first configuration comprises a first parameter set;
• one of the Q node IDs is used for identifying a target receiver of the fourth radio signal;
• the second radio signal set comprises a first MAC SDU set, the first MAC SDU set being used to generate a first radio signal set;
• the first parameter set is used for configuring a Radio Bearer for a target receiver of the first MAC SDU set, and the first parameter set is applicable to the first MAC SDU set;
• a transmitter of the first radio signal set is identified by one of the Q node IDs, or transmitters of Q1 radio signals in the first radio signal set are respectively identified by Q1 node IDs of the Q node IDs, Q1 being a positive integer greater than 1 and no greater than the Q.

A third node for wireless communications, comprising:

• a third receiver, receiving a fourth radio signal and an eleventh radio signal, the eleventh radio signal belonging to a second radio signal set;
• a third transmitter, transmitting a third radio signal and a twelfth radio signal, the twelfth radio signal belonging to a first radio signal set;
• wherein the third radio signal and the fourth radio signal respectively comprise first information, the first information comprising a node ID group and a first configuration;
• the node ID group comprises Q node IDs, Q being a positive integer greater than 1;
• the first configuration comprises a first parameter set;
• the first parameter set is used for configuring a Radio Bearer for a target receiver of the twelfth radio signal;
• the third node is identified by one of the Q node IDs, or transmitters of Q1 radio signals in the first radio signal set are respectively identified by Q1 node IDs of the Q node IDs and the third node is identified by one of the Q1 node IDs, Q1 being a positive integer greater than 1 and no greater than the Q;
• the first radio signal set and the second radio signal set respectively comprise a first MAC SDU set, and the first parameter set is applicable to the first MAC SDU set.