Multicast broadcast services notification and operation in inactive state
A method of multicast broadcast services (MBS) notification signaling includes determining, by a user equipment (UE), paging occasions for monitoring a downlink control channel associated with one or more paging messages comprising one or more MBS-related notifications that are associated with scheduling information for reception of MBS data; receiving the one or more MBS-related notifications based on monitoring the downlink control channel in one or more first paging occasions of the paging occasions; and receiving the MBS data based on the one or more MBS-related notifications.
1 . A method for a user equipment (UE), comprising:
receiving one or more paging messages based on monitoring a downlink control channel, the one or more paging messages including one or more multicast broadcast services (MBS)-related notifications, the one or more MBS-related notifications including an identifier, the one or more paging messages being indicated via downlink control information with a paging radio network temporary identifier (P-RNTI) on the downlink control channel, and the P-RNTI being shared for multiple UEs, including the UE that joined an MBS session;
determining, based on the identifier, that the one or more paging messages are associated with the UE;
performing a Radio Resource Control (RRC) state transition from an RRC idle state or an RRC inactive state to an RRC connected state based on the determining;
receiving one or more MBS configuration information associated with the one or more MBS-related notifications in association with the RRC state transition; and
receiving MBS data based on the one or more MBS configuration information.
2 . The method of claim 1 , wherein the one or more MBS-related notifications indicate a start time or an end time or an activation time or deactivation time of the MBS session.
3 . The method of claim 1 , wherein the one or more MBS-related notifications indicate a change in the MBS configuration information.
4 . The method of claim 1 , wherein the one or more paging messages are based on group paging.
5 . The method of claim 4 , wherein the one or more paging messages are received by one or more UEs including the UE, and the one or more UEs are interested in receiving the MBS data.
6 . The method of claim 1 , further comprising:
monitoring paging occasions for the downlink control channel associated with the one or more paging messages.
7 . The method of claim 6 , wherein determining the paging occasions is based on a UE identifier.
8 . The method of claim 6 , wherein determining the paging occasions is based on a discontinuous reception (DRX) procedure.
9 . A user equipment (UE) comprising one or more processors configured to:
receive one or more paging messages based on monitoring a downlink control channel, the one or more paging messages including one or more multicast broadcast services (MBS)-related notifications, the one or more MBS-related notifications including an identifier, the one or more paging messages being indicated via downlink control information with a paging radio network temporary identifier (P-RNTI) on the downlink control channel, and the P-RNTI being shared for multiple UEs, including the UE that joined an MBS session;
determine, based on the identifier, that the one or more paging messages are associated with the UE;
perform a Radio Resource Control (RRC) state transition from an RRC idle state or an RRC inactive state to an RRC connected state based on the determining;
receive one or more MBS configuration information associated with the one or more MBS-related notifications in association with the RRC state transition; and
receive MBS data based on the one or more MBS configuration information.
10 . A node comprising one or more processors configured to:
transmit one or more paging messages, the one or more paging messages including one or more multicast broadcast services (MBS)-related notifications, the one or more MBS-related notifications including an identifier, the identifier being used for a user equipment (UE) to determine that the one or more paging messages are associated with the UE for performing a Radio Resource Control (RRC) state transition from an RRC idle state or an RRC inactive state to an RRC connected state, the one or more paging messages are indicated via downlink control information with a paging radio network temporary identifier (P-RNTI) on a downlink control channel, and the P-RNTI is shared for multiple UEs, including the UE that joined an MBS session;
transmit one or more MBS configuration information associated with the one or more MBS-related notifications in association with the RRC state transition; and
transmit MBS data based on the one or more MBS configuration information.
11 . A method for a node, comprising:
transmitting one or more paging messages, the one or more paging messages including one or more multicast broadcast services (MBS)-related notifications, the one or more MBS-related notifications including an identifier, the identifier being used for a user equipment (UE) to determine that the one or more paging messages are associated with the UE for performing a Radio Resource Control (RRC) state transition from an RRC idle state or an RRC inactive state to an RRC connected state, the one or more paging messages are indicated via downlink control information with a paging radio network temporary identifier (P-RNTI) on a downlink control channel, and the P-RNTI is shared for multiple UEs, including the UE that joined an MBS session;
transmitting one or more MBS configuration information associated with the one or more MBS-related notifications in association with the RRC state transition; and
transmitting MBS data based on the one or more MBS configuration information.