Broadcasting packets using network coding via sidelink with feedback

An apparatus for wireless communication at a network node, comprising:

• at least one processor;
• and
• memory coupled with the at least one processor, instructions stored in the memory, the instructions being executable by the at least one processor, individually or in any combination, to cause the apparatus to:
• transmit, to a plurality of UEs, a set of network encoded packets representing a set of packets identified for broadcast to the plurality of UEs;
• transmit, to one or more of the plurality of UEs, an indication of one or more network coding parameters;
• receive feedback from one or more of the plurality of UEs, the feedback indicating, as respective subsets of the set of network encoded packets, one or more successfully received network encoded packets of the set of network encoded packets at the one or more UEs;
• determine, based at least in part on the feedback indicating the one or more successfully received network encoded packets, a subset of the set of network encoded packets that was successfully received for each of the one or more UEs;
• generate, based at least in part on the feedback, an updated set of one or more network encoded packets based at least in part on the set of packets, wherein the updated set of one or more network encoded packets excludes the subset of the set of network encoded packets that was successfully received;
• and
• transmit, in accordance with the one or more network coding parameters, the updated set of one or more network encoded packets to the plurality of UEs.

An apparatus for wireless communication at a network node, comprising:

• means for transmitting, to a plurality of UEs, a set of network encoded packets representing a set of packets identified for broadcast to the plurality of UEs;
• means for transmitting, to one or more of the plurality of UEs, an indication of one or more network coding parameters;
• means for receiving feedback from one or more of the plurality of UEs, the feedback indicating, as respective subsets of the set of network encoded packets, one or more successfully received network encoded packets of the set of network encoded packets at the one or more UEs;
• means for determining, based at least in part on the feedback indicating the one or more successfully received network encoded packets, a subset of the set of network encoded packets that was successfully received for each of the one or more UEs;
• means for generating, based at least in part on the feedback, an updated set of one or more network encoded packets based at least in part on the set of packets, wherein the updated set of one or more network encoded packets excludes the subset of the set of network encoded packets that was successfully received;
• and
• means for transmitting, in accordance with the one or more network coding parameters, the updated set of one or more network encoded packets to the plurality of UEs.

A non-transitory computer-readable medium storing code for wireless communication at a network node, the code comprising instructions executable by a processor to:

• transmit, to a plurality of UEs, a set of network encoded packets representing a set of packets identified for broadcast to the plurality of UEs;
• transmit, to one or more of the plurality of UEs, an indication of one or more network coding parameters;
• receive feedback from one or more of the plurality of UEs, the feedback indicating, as respective subsets of the set of network encoded packets, one or more successfully received network encoded packets of the set of network encoded packets at the one or more UEs;
• determine, based at least in part on the feedback indicating the one or more successfully received network encoded packets, a subset of the set of network encoded packets that was successfully received for each of the one or more UEs;
• generate, based at least in part on the feedback, an updated set of one or more network encoded packets based at least in part on the set of packets, wherein the updated set of one or more network encoded packets excludes the subset of the set of network encoded packets that was successfully received;
• and
• transmit, in accordance with the one or more network coding parameters, the updated set of one or more network encoded packets to the plurality of UEs.