Communication method, user equipment, network node, non-transitory computer-readable medium, chipset and system

A user equipment for use in a mobile communication system that provides a multicast/broadcast service (MBS), the user equipment comprising:

• a receiver configured to receive, from a network node, a radio resource control (RRC) Release message that causes the user equipment to transition to an RRC inactive state, the RRC Release message comprising information a notification of which is performed when a multicast session is deactivated;
• a controller configured to stop execution of predetermined processing of receiving the multicast session based on the information;
• and
• a transmitter configured to transmit, if the multicast session is not received after reception of the multicast control channel (multicast MCCH), a message that requests resumption of an RRC connection,
• wherein the receiver is further configured to receive the multicast MCCH in response to receiving a paging message comprising a session identifier of the multicast session.

A network node for use in a mobile communication system that provides a multicast/broadcast service (MBS), the network node comprising:

• a transmitter configured to transmit to a user equipment an RRC Release message that includes information a notification of which is performed when a multicast session is deactivated and causes the user equipment to transition to a radio resource control (RRC) inactive state, and a multicast control channel (multicast MCCH) that transmits configuration information used for reception of the multicast session in the RRC inactive state;
• and
• a receiver configured to receive, from the user equipment, a message requesting resumption of an RRC connection, the message being sent if the user equipment does not receive the multicast session after the multicast MCCH is transmitted by the transmitter,
• wherein the transmitter is further configured to transmit the multicast MCCH in response to transmitting a paging message comprising a session identifier of the multicast session, and
• the information comprised in the RRC Release message comprises information for causing the user equipment to stop execution of predetermined processing of receiving the multicast session.