Method, Apparatus and Computer Program Product for Providing Service Continuity for Multicast and Broadcast Service

A User Equipment (UE) configured to support service continuity for Multicast and Broadcast Service (MBS), the UE comprising:

• a processor;
• and
• a memory operably coupled to the processor and containing instructions that, when executed by the processor, configure the UE to:
• determine whether data loss occurred in MBS data previously transmitted by a first Radio Access Network (RAN) node while the UE was in an RRC_INACTIVE state;
• and
• send to a second RAN node a request to resume the UE's Radio Resource Control (RRC) connection from the RRC_INACTIVE state, wherein when it is determined that the data loss occurred, the request to resume includes a request for retransmission of one or more missing Packet Data Units (PDUs) from the MBS data.

A first radio access Network (RAN) node configured to provide service continuity for Multicast and Broadcast Service (MBS), the first RAN node comprising:

• a processor;
• a processor;
• and
• a memory operably coupled to the processor and containing instructions that, when executed by the processor, configure the first RAN node to:
• receive from a User Equipment (UE) a request to resume the UE's Radio Resource Control (RRC) connection from an RRC_INACTIVE state, wherein the request to resume includes a request for retransmission of one or more missing Packet Data Units (PDUs) in MBS data associated with an MBS session, wherein the one or missing PDUs were previously transmitted by a second RAN node while the UE was in the RRC_INACTIVE state;
• and
• handle retransmission of the missing PDUs according to the request for retransmission.