Method and device in nodes used for HARQ feedback in wireless communication

A second node for wireless communications, comprising:

• a second transmitter, transmitting a first signaling group;
• transmitting a first signal group;
• transmitting a second signaling group;
• and
• a second receiver, receiving a first bit block set in a first radio resource group;
• wherein the first signaling group is used to indicate scheduling information of the first signal group, the second signaling group is used to indicate scheduling information of a second signal group, a target receiver of the first signaling group is a target receiver of the second signaling group, a transmitter of the second signal group is a target receiver of the second signaling group, and a target receiver of the second signal group is different from the second node;
• the first bit block set comprises a first bit block, and the first bit block is related to whether the first signal group is correctly received;
• a size of the first bit block is related to whether the first bit block set comprises a second bit block, and the second bit block is related to whether the second signal group is correctly received;
• when the first bit block set comprises only the first bit block in the first bit block and the second bit block, a last signaling in the first signaling group is used to determine the size of the first bit block;
• when the first bit block set comprises the first bit block and the second bit block, the size of the first bit block is equal to a first positive integer, the first positive integer is pre-configured or the first positive integer is configurable.

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

• receiving a first signaling group;
• receiving a first signal group;
• receiving a second signaling group;
• transmitting a second signal group;
• and
• transmitting a first bit block set in a first radio resource group;
• wherein the first signaling group is used to indicate scheduling information of the first signal group, the second signaling group is used to indicate scheduling information of the second signal group, and a transmitter of the first signal group is different from a target receiver of the second signal group;
• the first bit block set comprises a first bit block, and the first bit block is related to whether the first signal group is correctly received;
• a size of the first bit block is related to whether the first bit block set comprises a second bit block, and the second bit block is related to whether the second signal group is correctly received;
• when the first bit block set comprises only the first bit block in the first bit block and the second bit block, a last signaling in the first signaling group is used to determine the size of the first bit block;
• when the first bit block set comprises the first bit block and the second bit block, the size of the first bit block is equal to a first positive integer, the first positive integer is pre-configured or the first positive integer is configurable.

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

• transmitting a first signaling group;
• transmitting a first signal group;
• transmitting a second signaling group;
• and
• receiving a first bit block set in a first radio resource group;
• wherein the first signaling group is used to indicate scheduling information of the first signal group, the second signaling group is used to indicate scheduling information of a second signal group, a target receiver of the first signaling group is a target receiver of the second signaling group, a transmitter of the second signal group is a target receiver of the second signaling group, and a target receiver of the second signal group is different from the second node;
• the first bit block set comprises a first bit block, and the first bit block is related to whether the first signal group is correctly received;
• a size of the first bit block is related to whether the first bit block set comprises a second bit block, and the second bit block is related to whether the second signal group is correctly received;
• when the first bit block set comprises only the first bit block in the first bit block and the second bit block, a last signaling in the first signaling group is used to determine the size of the first bit block;
• when the first bit block set comprises the first bit block and the second bit block, the size of the first bit block is equal to a first positive integer, the first positive integer is pre-configured or the first positive integer is configurable.