Downlink retransmission by relay node

A communication device of a first wireless node for wireless communication, comprising:

• one or more interfaces configured to output, prior to outputting a first communication, control information relating to the first communication, wherein the control information relating to the first communication relates to configuring a relay node to perform a second communication;
• the one or more interfaces configured to output, to the relay node, the first communication carrying a payload;
• the one or more interfaces configured to obtain an indication that a second wireless node has not successfully received the payload;
• and
• a processing system configured to trigger, based at least in part on a buffer of the communication device, a retransmission of at least part of the second communication carrying the payload after receiving the indication, wherein triggering the retransmission further comprises transmitting control information relating to the retransmission.

A communication device of a control node for wireless communication, comprising:

• one or more interfaces configured to:
• output, to a first wireless node, a first configuration relating to a first communication carrying a payload;
• output, to a relay node, a second configuration relating to:
• obtaining the first communication,
• outputting a second communication carrying the payload, and
• outputting, based at least in part on a buffer of a communication device of the relay node, a retransmission of at least part of the second communication based at least in part on receiving an indication that a second wireless node has not successfully received the second communication;
• and
• obtain capability information regarding the relay node, wherein at least one of the first configuration or the second configuration is based on the capability information.

A method performed by a communication device of a relay node, comprising:

• transmitting, prior to receiving a first communication from a first wireless node, capability information indicating that the relay node is capable of processing feedback indicating that a second wireless node has not received a second communication;
• receiving, from the first wireless node and via a first wireless link, the first communication carrying a payload;
• generating the second communication associated with information of the first communication, wherein the second communication is different than the first communication, and wherein the second communication carries the payload;
• transmitting, to the second wireless node and via a second wireless link, the second communication;
• receiving an indication that the second wireless node has not successfully received the second communication, wherein receiving the indication further comprises receiving, from the second wireless node, the feedback indicating that the second wireless node has not received the second communication;
• and
• transmitting, based at least in part on a buffer of the communication device of the relay node, a retransmission of at least part of the second communication based at least in part on receiving the indication.