Communication control method
A communication control method is used in a mobile communication system for providing a multicast broadcast service (MBS) on a per zone basis, the zone being narrower than a cell. The communication control method includes broadcasting, by a base station configured to manage a first cell, in the first cell, system information including zone information indicating a zone where MBS transmission is to be performed in a second cell different from the first cell, receiving, by a user equipment located in the first cell, the system information, and performing, by the user equipment, a predetermined operation to receive MBS data within the zone based on the system information.
1 . A communication control method used in a mobile communication system for providing a multicast broadcast service (MBS) on a per zone basis, the zone being narrower than a cell, the communication control method comprising:
broadcasting, by a base station configured to manage a first cell, in the first cell, system information comprising zone information indicating a zone where MBS transmission is to be performed in a second cell different from the first cell;
receiving, by a user equipment located in the first cell, the system information; and
performing, by the user equipment, a predetermined operation to receive MBS data within the zone based on the system information,
wherein
the system information further comprises an identifier associated with the zone information, and
the identifier corresponds to at least one selected from the group consisting of an identifier indicating the second cell, an identifier indicating a frequency to which the second cell belongs, and an identifier indicating an MBS session used for the MBS transmission to the zone.
2 . The communication control method according to claim 1 , wherein
the performing the predetermined operation comprises performing, by the user equipment in a Radio Resource Control (RRC) idle state or an RRC inactive state, an operation of cell reselection from the first cell to the second cell, and
the performing the operation of the cell reselection comprises configuring the second cell or a frequency to which the second cell belongs to be a highest priority in the cell reselection when the user equipment moves to the zone and receives the MBS data transmitted to the zone.
3 . The communication control method according to claim 1 ,
wherein the performing the predetermined operation comprises performing, by the user equipment in a connected state, an operation to switch connection from the first cell to the second cell based on the system information, and
the performing the operation to switch connection comprises transmitting, by the user equipment, a notification to the base station when the user equipment moves to the zone and receives the MBS data transmitted to the zone.
4 . A user equipment used in a mobile communication system for providing a multicast broadcast service (MBS) on a per zone basis, the zone being narrower than a cell, the user equipment comprising:
a receiver configured to receive from a base station configured to manage a first cell, in the first cell, system information comprising zone information indicating a zone where MBS transmission is to be performed in a second cell different from the first cell, and
a controller configured to perform a predetermined operation to receive MBS data within the zone based on the system information, wherein
the system information further comprises an identifier associated with the zone information, and
the identifier corresponds to at least one selected from the group consisting of an identifier indicating the second cell, an identifier indicating a frequency to which the second cell belongs, and an identifier indicating an MBS session used for the MBS transmission to the zone.