MRB architecture with PDCP retransmission

A wireless device, comprising:

• one or more processors and one or more memories coupled with the one or more processors, the one or more processors configured to cause the wireless device to:
• receive a Packet Data Convergence Protocol (PDCP) packet data unit (PDU) including a polling bit;
• generate a PDCP status report indicating at least a first missing count (FMC) of a next not received PDCP PDU for a multicast session in response to receiving the PDCP PDU including the polling bit, wherein:
• the PDCP PDU indicates that a PDCP status reporting condition for the multicast session has occurred, and
• the polling bit being included based on at least one of a threshold associated with a number of PDCP PDUs sent or a threshold associated with a number of bytes of the PDCP PDUs sent;
• send the PDCP status report to a network entity, and
• receive a retransmitted PDCP PDU from the network entity via a unicast transport channel or a multicast transport channel, a unicast radio link control (RLC) entity associated with the unicast transport channel and a multicast RLC entity associated with the multicast transport channel, wherein the retransmitted PDCP PDU corresponds to the next not received PDCP PDU.

One or more non-transitory processor-readable media having stored thereon processor-executable instructions that, when executed by one or more processors of a wireless device, cause the wireless device to perform operations comprising:

• receiving a Packet Data Convergence Protocol (PDCP) packet data unit (PDU) including a polling bit;
• generating a PDCP status report indicating at least a first missing count (FMC) of a next not received PDCP PDU for a multicast session in response to receiving the PDCP PDU including the polling bit, wherein:
• the PDCP PDU indicates that a PDCP status reporting condition for the multicast session has occurred, and
• the polling bit being included based on at least one of a threshold associated with a number of PDCP PDUs sent or a threshold associated with a number of bytes of the PDCP PDUs sent;
• sending the PDCP status report to a network entity, and
• receiving a retransmitted PDCP PDU from the network entity via a unicast transport channel or a multicast transport channel, a unicast radio link control (RLC) entity associated with the unicast transport channel and a multicast RLC entity associated with the multicast transport channel, wherein the retransmitted PDCP PDU corresponds to the next not received PDCP PDU.