Communication control method
A communication control method is used in a mobile communication system for providing a multicast broadcast service (MBS). The communication control method includes transmitting, by a base station, MBS data to user equipment in a first cell, transmitting, by the base station to the user equipment, a notification message indicating that an MBS cell being a cell used to transmit or receive the MBS data is to be changed from the first cell to a second cell, and receiving, by the user equipment configured to receive the MBS data from the base station, the notification message from the base station.
1 . A communication control method used in a mobile communication system for providing a multicast broadcast service (MBS), the communication control method comprising:
transmitting, by a base station configured to manage a first cell and a second cell different from the first cell, to a user equipment in the first cell, a notification message related to MBS transmission in a second cell different from the first cell;
performing, by the base station, the MBS transmission in the second cell while maintaining connection between the user equipment and the first cell, wherein
the notification message comprises bandwidth part information indicating a bandwidth part used in the second cell for the MBS transmission, and
the bandwidth part information comprises information indicating a first Physical Resource Block (PRB) allocation.
2 . The communication control method according to claim 1 , wherein
the bandwidth part information comprises at least one of information indicating a frequency allocation of the bandwidth part, information indicating a subcarrier spacing of the bandwidth part, and information indicating a cyclic prefix length used in the bandwidth part.
3 . A base station providing a multicast broadcast service (MBS), the base station comprising:
a controller configured to manage a first cell and a second cell different from the first cell, and
a transmitter configured to transmit to a user equipment in the first cell, a notification message related to MBS transmission in a second cell different from the first cell, and transmit to the user equipment MBS data in the second cell while maintaining connection between the user equipment and the first cell, wherein
the notification message comprises bandwidth part information indicating a bandwidth part used in the second cell for the MBS transmission, and
the bandwidth part information comprises information indicating a first Physical Resource Block (PRB) allocation.
4 . An apparatus configured to control a user equipment in a mobile communication system for providing a multicast broadcast service (MBS), the apparatus comprising a processor and a memory coupled to the processor, the processor configured to:
receive from a base station configured to manage a first cell and a second cell different from the first cell, via the first cell, a notification message related to MBS transmission in the second cell, and
receive from the base station MBS data in the second cell while maintaining connection in the first cell, wherein
the notification message comprises bandwidth part information indicating a bandwidth part used in the second cell for the MBS transmission, and
the bandwidth part information comprises information indicating a first Physical Resource Block (PRB) allocation.
5 . A user equipment in a mobile communication system for providing a multicast broadcast service (MBS), the user equipment comprising:
a receiver configured to receive from a base station configured to manage a first cell and a second cell different from the first cell, via the first cell, a notification message related to MBS transmission in the second cell, and receive from the base station MBS data in the second cell while maintaining connection in the first cell,
wherein the notification message comprises bandwidth part information indicating a bandwidth part used in the second cell for the MBS transmission, and
the bandwidth part information comprises information indicating a first Physical Resource Block (PRB) allocation.