Data processing method and apparatus of packet data convergence protocol (PDCP) layer supporting multicast and broadcast service (MBS) in next-generation mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsDonggun Kim, Sangkyu Baek
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Abstract
The disclosure relates to a communication technique for fusing a 5G communication system with IoT technology to support higher data rate after the 4G system and a system thereof. The disclosure may be applied to an intelligent service (e.g., smart home, smart building, smart city, smart or connected car, healthcare, digital education, retail, security and safety related services, etc.) based on 5G communication technology and IoT-related technology. The disclosure discloses a method for allowing a UE to normally receive a MBS service in various scenarios.
Claims12
A method performed by a terminal in a wireless communication system, the method comprising:
- receiving, from a base station, a radio resource control (RRC) message including an indicator indicating a packet data convergence protocol (PDCP) re-establishment associated with a multicast and broadcast service (MBS) radio bearer (MRB);
- based on the indicator indicating the PDCP re-establishment, setting an RX_NEXT to an initial value;
- and
- based on the indicator indicating the PDCP re-establishment, stopping a reordering timer and delivering, to an upper layer, at least one stored PDCP service data unit (SDU),
- wherein the initial value is based on a sequence number of a first received PDCP protocol data unit (PDU) increased by one for an unacknowledged mode (UM) MRB.
A terminal in a wireless communication system, the terminal comprising:
- a transceiver;
- and
- at least one processor configured to:
- receive, from a base station via the transceiver, a radio resource control (RRC) message including an indicator indicating a packet data convergence protocol (PDCP) re-establishment associated with a multicast and broadcast service (MBS) radio bearer (MRB),
- based on the indicator indicating the PDCP re-establishment, set an RX_NEXT to an initial value, and
- stop a reordering timer and deliver, to an upper layer, at least one stored PDCP service data unit (SDU),
- wherein the initial value is based on a sequence number of a first received PDCP protocol data unit (PDU) increased by one for an unacknowledged mode (UM) MRB.
Dependencies are inferred from the claim text.