Method and device for security MBS communication in wireless communication system
Provided are a method and apparatus for security multicast and broadcast service (MBS) communication in a wireless communication system. An operating method of a terminal in a wireless communication system includes receiving configuration information to be applied to MBS data from a base station, and receiving the MBS data based on the configuration information, wherein the configuration information is for configuring an initial value of a state variable corresponding to the MBS data.
1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, configuration information for a multicast broadcast service (MBS), wherein the configuration information for the MBS includes an initial value of an RX_DELIV; and
applying the initial value of the RX_DELIV to the RX_DELIV for a radio bearer for the MBS,
wherein the RX_DELIV is a packet data convergence protocol (PDCP) state variable indicating a count value of a first packet not delivered to an upper layer.
2 . The method of claim 1 , further comprising applying 0 to the RX_DELIV for a radio bearer for a unicast service.
3 . The method of claim 1 , wherein the RX_DELIV includes a hyper frame number (HFN) and a sequence number (SN).
4 . The method of claim 1 , further comprising transmitting, to the base station, a configuration complete message indicating that the initial value of the RX_DELIV is applied.
5 . A user equipment (UE) for use in a wireless communication system, the UE comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive, from a base station, configuration information for a multicast broadcast service (MBS), wherein the configuration information for the MBS includes an initial value of an RX_DELIV; and
apply the initial value of the RX_DELIV to the RX_DELIV for a radio bearer for the MBS,
wherein the RX_DELIV is a packet data convergence protocol (PDCP) state variable indicating a count value of a first packet not delivered to an upper layer.
6 . The UE of claim 5 , wherein the at least one processor is further configured to apply 0 to the RX_DELIV for a radio bearer for a unicast service.
7 . The UE of claim 5 , wherein the RX_DELIV includes a hyper frame number (HFN) and a sequence number (SN).
8 . The UE of claim 5 , wherein the at least one processor is further configured to transmit, to the base station, a configuration complete message indicating that the initial value of the RX_DELIV is applied.
9 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE), configuration information for a multicast broadcast service (MBS), wherein the configuration information for the MBS includes an initial value of an RX_DELIV,
wherein the transmission of the initial value of the RX_DELIV causes the UE to apply the initial value of the RX_DELIV to the RX_DELIV for a radio bearer for the MBS, and
wherein the RX_DELIV is a packet data convergence protocol (PDCP) state variable indicating a count value of a first packet not delivered to an upper layer.
10 . The method of claim 9 , wherein 0 is applied to the RX_DELIV for a radio bearer for a unicast service.
11 . The method of claim 9 , wherein the RX_DELIV includes a hyper frame number (HFN) and a sequence number (SN).
12 . A base station for use in a wireless communication system, the base station comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to transmit, to a user equipment (UE), configuration information for a multicast broadcast service (MBS), wherein the configuration information for the MBS includes an initial value of an RX_DELIV,
wherein the transmission of the initial value of the RX_DELIV causes the UE to apply the initial value of the RX_DELIV to the RX_DELIV for a radio bearer for the MBS, and
wherein the RX_DELIV is a packet data convergence protocol (PDCP) state variable indicating a count value of a first packet not delivered to an upper layer.
13 . The base station of claim 12 , wherein 0 is applied to the RX_DELIV for a radio bearer for a unicast service.
14 . The base station of claim 12 , wherein the RX_DELIV includes a hyper frame number (HFN) and a sequence number (SN).