Applying network coding at one or more multicast radio bearer (mrb) paths in a multicast and broadcast service (mbs) system

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

• a processor;
• a memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive, from a network device, radio resource control (RRC) signaling comprising an initial transmission parameter indicating whether a network coding function is enabled for an initial transmission from a first radio link control (RLC) entity associated with a multicast radio bearer (MRB) and a retransmission parameter indicating whether the network coding function is enabled for a retransmission from a second RLC entity associated with the MRB;
• receive, from the first RLC entity of the network device, the initial transmission, the initial transmission comprising a set of initial data units;
• transmit, to the network device, a status data unit comprising a set of status indicators, one or more status indicators of the set of status indicators indicating a reception failure based on the set of initial data units satisfying a failure condition;
• and
• receive, from the second RLC entity of the network device, the retransmission comprising a set of retransmission data units, both the retransmission and the set of retransmission data units being received based on the one or more status indicators indicating the reception failure.

A method for wireless communication performed by a network device, comprising:

• transmitting, to a user equipment (UE) from the network device, radio resource control (RRC) signaling comprising an initial transmission parameter indicating whether a network coding function is enabled for an initial transmission from a first radio link control (RLC) entity of the network device associated with a multicast radio bearer (MRB) and a retransmission parameter indicating whether the network coding function is enabled for a retransmission from a second RLC entity of the network device associated with the MRB;
• transmitting, from the first RLC entity to the UE, a set of initial data units associated with the initial transmission;
• receiving, from the UE, a status data unit comprising a set of status indicators, one or more status indicators of the set of status indicators indicating a reception failure;
• and
• transmitting, from the second RLC entity to the UE, a set of retransmission data units associated with the retransmission, the set of retransmission data units being transmitted based on the one or more status indicators indicating the reception failure.

An apparatus for wireless communications at a network device, comprising:

• a processor;
• a memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• transmit, to a user equipment (UE) from the network device, radio resource control (RRC) signaling comprising an initial transmission parameter indicating whether a network coding function is enabled for an initial transmission from a first radio link control (RLC) entity of the network device associated with a multicast radio bearer (MRB) and a retransmission parameter indicating whether the network coding function is enabled for a retransmission from a second RLC entity of the network device associated with the MRB;
• transmit, from the first RLC entity to the UE, a set of initial data units associated with the initial transmission;
• receive, from the UE, a status data unit comprising a set of status indicators, one or more status indicators of the set of status indicators indicating a reception failure;
• and
• transmit, from the second RLC entity to the UE, a set of retransmission data units associated with the retransmission, the set of retransmission data units being transmitted based on the one or more status indicators indicating the reception failure.