Method and apparatus for group paging in a wireless communication system
A method and apparatus for group paging in a wireless communication system is provided. A wireless device acquires a specific paging subgroup identifier (ID) related to the wireless device. A wireless device joins a multicast session. A wireless device receives, from a network, a paging early indication (PEI) which does not include the specific paging subgroup ID. A wireless device monitors a paging occasion associated with the PEI, to receive an activation notification for the multicast session.
1. A method performed by a wireless device in a wireless communication system, the method comprising,
configuring a specific subgroup that the wireless device belongs to,
wherein the specific subgroup is either assigned by a network or is formed based on an Identity (ID) of the wireless device;
based on the wireless device not expecting a Multicast and Broadcast Service (MBS) group notification, monitoring a paging early indication (PEI);
based on receiving the PEI and the PEI indicating the specific subgroup the wireless device belongs to, monitoring a paging occasion associated with the PEI; and
based on receiving the PEI and the PEI not indicating the specific subgroup the wireless device belongs to, skipping monitoring the paging occasion associated with the PEI;
based on the wireless device expecting an MBS group notification:
ignoring the PEI; and
monitoring a paging occasion.
2. The method of claim 1 , further comprising:
receiving, from the network, a PEI configuration via system information.
3. The method of claim 1 , further comprising:
receiving a paging message by monitoring the paging occasion associated with the PEI,
wherein the MBS group notification is included in the paging message.
4. The method of claim 1 , wherein the MBS group notification is a session identifier (ID) of a multicast session.
5. The method of claim 1 , further comprising:
entering into a Radio Resource Control (RRC)_CONNECTED state from an RRC_IDLE state or an RRC_INACTIVE state, based on receiving the MBS group notification.
6. The method of claim 5 , further comprising:
receiving, from the network, a multicast service based on the MBS group notification.
7. The method of claim 1 , wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.
8. A wireless device in a wireless communication system comprising:
a transceiver;
a memory; and
at least one processor operatively coupled to the transceiver and the memory, and configured to:
configure a specific subgroup that the wireless device belongs to,
wherein the specific subgroup is either assigned by a network or is formed based on an Identity (ID) of the wireless device;
based on the wireless device not expecting a Multicast and Broadcast Service (MBS) group notification, monitor a paging early indication (PEI);
based on receiving the PEI and the PEI indicating the specific subgroup the wireless device belongs to, monitor a paging occasion associated with the PEI; and
based on receiving the PEI and the PEI not indicating the specific subgroup the wireless device belongs to, skip monitoring the paging occasion associated with the PEI;
based on the wireless device expecting an MBS group notification:
ignore the received PEI; and
monitor a paging occasion.
9. The wireless device of claim 8 , wherein the at least one processor is further configured to control the transceiver to receive, from the network, a PEI configuration via system information.
10. The wireless device of claim 8 ,
wherein the at least one processor is further configured to control the transceiver to receive a paging message by monitoring the paging occasion associated with the PEI, and
wherein the MBS group notification is included in the paging message.
11. The wireless device of claim 8 , wherein the MBS group notification is a session identifier (ID) of a multicast session.
12. The wireless device of claim 8 , wherein the at least one processor is further configured to enter into a Radio Resource Control (RRC)_CONNECTED state from an RRC_IDLE state or an RRC_INACTIVE state, based on receiving the MBS group notification.
13. The wireless device of claim 12 , wherein the at least one processor is further configured to control the transceiver to receive, from the network, a multicast service based on the MBS group notification.
14. The wireless device of claim 8 , wherein the at least one processor is further configured to be in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.