Method and device for MBS communication in wireless communication system
The present disclosure relates to a communication technique for converging, with an IoT technology, a 5G communication system for supporting a higher data transmission rate than a 4G system, and a system therefor. The present disclosure relates to a method performed by a terminal which receives a multicast and broadcast service (MBS) in a wireless communication system, and the method may comprise the steps of: receiving, from a base station, downlink control information (DCI) based on a specific radio network temporary identifier (RNTI) related to the MBS; and starting a bandwidth part (BWP) deactivation timer in response to reception of the DCI, wherein the specific RNTI includes a group-RNTI (G-RNTI).
1 . 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 information on a group-radio network temporary identifier (g-RNTI), wherein the g-RNTI is associated with a multicast broadcast service (MBS) multicast service;
receiving, from the base station, a physical downlink control channel (PDCCH) addressed to the g-RNTI for a multicast on an active bandwidth part (BWP);
starting a BWP inactivity timer associated with the active BWP;
in case that the BWP inactivity timer associated with the active BWP expires, identifying whether an MBS service that the terminal is interested in is configured in the active BWP:
in case that the MBBS service that the terminal is interested in is configured in the active BWP, remaining in the active BWP; and
in case that the MBS service that the terminal is interested in is not configured in the active BWP, switching to a default BWP.
2 . The method of claim 1 , wherein the RRC message further includes second information for configuring at least one BWP.
3 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a radio resource control (RRC) message including information on a group-radio network temporary identifier (g-RNTI), wherein the g-RNTI is associated with a multicast broadcast service (MBS) multicast service; and
transmitting, to the terminal, a physical downlink control channel (PDCCH) addressed to the g-RNTI for a multicast on an active bandwidth part (BWP),
wherein a BWP inactivity timer associated with the active BWP is started based on the PDCCH addressed to the g-RNTI,
wherein in case that the BWP inactivity timer associated with the active BWP expires and an MBS service that the terminal is interested in is configured in the active BWP, the terminal remains in the active BWP, and
wherein in case that the BWP inactivity timer associated with the active BWP expires and an MBS service that the terminal is interested in is not configured in the active BWP, the terminal switches to a default BWP.
4 . The method of claim 3 , wherein the RRC message further includes second information for configuring at least one BWP.
5 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a base station, a radio resource control (RRC) message including information on a group-radio network temporary identifier (g-RNTI), wherein the g-RNTI is associated with a multicast broadcast service (MBS) multicast service,
receive, from the base station, a physical downlink control channel (PDCCH) addressed to the g-RNTI for a multicast on an active bandwidth part (BWP),
start a BWP inactivity timer associated with the active BWP,
in case that the BWP inactivity timer associated with the active BWP expires, identify whether an MBS service that the terminal is interested in is configured in the active BWP,
in case that the MBS service that the terminal is interested in is configured in the active BWP, remain in the active BWP, and
in case that the MBS service that the terminal is interested in is not configured in the active BWP, switch to a default BWP.
6 . The terminal of claim 5 , wherein the RRC message further includes second information for configuring at least one BWP.
7 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
transmit, to a terminal, a radio resource control (RRC) message including information on a group-radio network temporary identifier (g-RNTI), wherein the g-RNTI is associated with a multicast broadcast service (MBS) multicast service, and
transmit, to the terminal, a physical downlink control channel (PDCCH) addressed to the g-RNTI for a multicast on an active bandwidth part (BWP),
wherein a BWP inactivity timer associated with the active BWP is started based on the PDCCH addressed to the g-RNTI for the multicast,
wherein in case that the BWP inactivity timer associated with the active BWP expires and an MBS service that the terminal is interested in is configured in the active BWP, the terminal remains in the active BWP, and
wherein in case that the BWP inactivity timer associated with the active BWP expires and an MBS service that the terminal is interested in is not configured in the active BWP, the terminal switches to a default BWP.
8 . The base station of claim 7 , wherein the RRC message further includes second information for configuring at least one BWP.