Method and device for BWP switching for receiving MBS in mobile communication system
According to an embodiment of the present disclosure, an operation method of a user equipment (UE) in a wireless communication system may be provided. The operation method may include identifying whether an active bandwidth part (BWP) is the same as a BWP for a multicast and broadcast service (MBS) selected by the UE, transmitting, to a base station, a message including information about the MBS when the active BWP is different from the BWP for the MBS, receiving, from the base station, based on the message, information for providing a service based on the MBS, and receiving the MBS, based on the information for providing the service based on the MBS.
1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
identifying that an active bandwidth part (BWP) is different from a BWP for a multicast and broadcast service (MBS) of interest;
transmitting, to a base station, a message to request the MBS of interest for which the BWP is different from the active BWP to be provided on the active BWP, based on the identification, wherein the message includes a list of one or more MBSs of interest;
starting a timer for prohibiting retransmission of the message to request the MBS of interest to be provided on the active BWP;
receiving, from the base station, based on the message to request the MBS of interest to be provided on the active BWP, an updated list of one or more MBSs provided on the active BWP, wherein the updated list of the one or more MBSs includes the MBS of interest; and
receiving the MBS of interest on the active BWP, based on the updated list of the one or more MBSs including the MBS of interest.
2 . The method of claim 1 , wherein the updated list of the one or more MBSs is included in a radio resource control (RRC) Reconfiguration message or a system information block message.
3 . A method performed by a base station in a wireless communication system, the method comprising:
in case that an active bandwidth part (BWP) is different from a BWP for a multicast and broadcast service (MBS) of interest, receiving, from a user equipment (UE), a message to request the MBS of interest for which the BWP is different from the active BWP to be provided on the active BWP, wherein the message includes a list of one or more MBSs f interest, and a timer for prohibiting retransmission of the message to request the MBS of interest to be provided on the active BWP is started at the UE;
updating a list of one or more MBSs provided on the active BWP to include the MBS of interest, based on the message to request the MBS of interest to be provided on the active BWP;
transmitting, to the UE, the updated list of the one or more MBSs including the MBS of interest; and
transmitting, to the UE, the MBS of interest on the active BWP based on the updated list of the one or more MBSs including the MBS of interest.
4 . The method of claim 3 , wherein the updated list of the one or more MBSs is included in a radio resource control (RRC) Reconfiguration message or a system information block message.
5 . A user equipment (UE) in a wireless communication system, the UE comprising:
a communicator; and
at least one processor connected with the communicator and configured to:
identify that an active bandwidth part (BWP) is different from a BWP for a multicast and broadcast service (MBS) of interest,
transmit, to a base station, a message to request the MBS of interest for which the BWP is different from the active BWP to be provided on the active BWP, based on the identification, wherein the message includes a list of one or more MBSs of interest,
start a timer for prohibiting retransmission of the message to request the MBS of interest to be provided on the active BWP,
receive, from the base station, based on the message to request the MBS of interest, to be provided on the active BWP, an updated list of one or more MBSs provided on the active BWP, wherein the updated list of the one or more MBSs includes the MBS of interest, and
receive the MBS of interest on the active BWP, based on the updated list of the one or more MBSs including the MBS of interest.
6 . A base station in a wireless communication system, the base station comprising:
a communicator; and
at least one processor connected with the communicator and configured to:
in case that an active bandwidth part (BWP) is different from a BWP for a multicast and broadcast service (MBS) of interest, receive, from a user equipment (UE), a message to request the MBS of interest for which the BWP is different from the active BWP to be provided on the active BWP, wherein the message includes a list of one or more MBSs of interest, and a timer for prohibiting retransmission of the message to request the MBS of interest to be provided on the active BWP is started at the UE,
update a list of one or more MBSs provided on the active BWP to include the MBS of interest, based on the message to request the MBS of interest to be provided on the active BWP,
transmit, to the UE, the updated list of the one or more MBSs including the MBS of interest, and
transmit, to the UE, the MBS of interest on the active BWP based on the updated list of the one or more MBSs including the MBS of interest.