Coded radio link control retransmission

A method for wireless communication at a network entity, comprising:

• transmitting, to a user equipment (UE), radio resource control signaling indicating a number of protocol data units that the UE is configured to store in a buffer at the UE for decoding lost protocol data units;
• generating, at a layer, a protocol data unit for a broadcast or unicast transmission;
• transmitting the protocol data unit in the broadcast or unicast transmission;
• receiving a status protocol data unit indicating that the UE failed to receive or decode the protocol data unit;
• and
• transmitting a repair protocol data unit comprising redundant bits of a plurality of protocol data units including the protocol data unit that the UE failed to receive or decode based at least in part on receiving the status protocol data unit, wherein the repair protocol data unit indicating a range of sequence numbers of the plurality of protocol data units for which redundant bits are included in the repair protocol data unit.

An apparatus for wireless communication at a user equipment (UE), comprising:

• at least one processor;
• and
• at least one memory coupled with the at least one processor, with instructions stored in the at least one memory, the instructions being executable by the at least one processor to cause the apparatus to:
• receive radio resource control signaling indicating a number of protocol data units that the UE is configured to store in a buffer at the UE for decoding lost protocol data units;
• identify that the UE failed to receive or decode a protocol data unit scheduled to be transmitted by a network entity in a broadcast or unicast transmission;
• transmit, to the network entity, a status protocol data unit indicating that the UE failed to receive or decode the protocol data unit;
• receive, from the network entity and responsive to the status protocol data unit, a repair protocol data unit comprising redundant bits of a plurality of protocol data units including the protocol data unit that the UE failed to receive or decode, the repair protocol data unit indicating a range of sequence numbers of the plurality of protocol data units for which redundant bits are included in the repair protocol data unit;
• and
• combining at least one correctly decoded protocol data unit stored in the buffer with the redundant bits of the protocol data unit in an attempt to decode at least the protocol data unit that the UE failed to receive or decode.

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

• at least one processor;
• and
• at least one memory coupled with the at least one processor, with instructions stored in the at least one memory, the instructions being executable by the at least one processor to cause the apparatus to:
• transmit, to a user equipment (UE), radio resource control signaling indicating a number of protocol data units that the UE is configured to store in a buffer at the UE for decoding lost protocol data units;
• generate, at a layer, a protocol data unit for a broadcast or unicast transmission;
• transmit the protocol data unit in the broadcast or unicast transmission;
• receive a status protocol data unit indicating that the UE failed to receive or decode the protocol data unit;
• and
• transmit a repair protocol data unit comprising redundant bits of a plurality of protocol data units including the protocol data unit that the UE failed to receive or decode based at least in part on receiving the status protocol data unit, wherein the repair protocol data unit indicating a range of sequence numbers of the plurality of protocol data units for which redundant bits are included in the repair protocol data unit.