Base station and radio terminal for performing radio access network paging
A base station according to an embodiment is a base station included in a RAN of a mobile communication system. The base station includes a receiver configured to receive, from a radio terminal in a specific state, a message indicating that the radio terminal has left a RAN paging area, and a transmitter configured to transmit, to a mobility management entity, paging area information related to update of the RAN paging area in response to the reception of the message. The specific state is a state in which an anchor base station in the RAN paging area maintains an S1 connection for the radio terminal and the RAN paging area is configured to the radio terminal.
1. A communication control method in a mobile communication system, comprising:
configuring, by a base station included in a radio access network (RAN), a RAN paging area to a user equipment;
transmitting, from the base station to a neighboring base station included in the RAN paging area, a paging request that requests the neighboring base station to perform a RAN paging for the user equipment, the paging request including identification information of the user equipment and a discontinuous reception (DRX) configuration of the user equipment;
receiving, by the base station from the neighboring base station, a message indicating that the RAN paging has failed in the neighboring base station for the user equipment; and
transmitting, from the base station to a core network node, a message indicating that RAN paging for the user equipment has failed, wherein
the RAN paging is an operation in which the RAN performs a paging for the user equipment by a unit of the RAN paging area.
2. The communication control method according to claim 1 , further comprising:
performing a cell reselection operation by the user equipment in a specific state in which the RAN paging area is configured; and
performing, by the user equipment in the specific state, an operation of transitioning from the specific state to a radio resource control (RRC) idle mode when the user equipment reselects a cell not supporting the specific state in the cell reselection operation.
3. A base station included in a radio access network (RAN), comprising:
a controller configured to configure a RAN paging area to a user equipment;
a transmitter configured to transmit, to a neighboring base station included in the RAN paging area, a paging request that requests the neighboring base station to perform a RAN paging for the user equipment, the paging request including identification information of the user equipment and a discontinuous reception (DRX) configuration of the user equipment; and
a receiver configured to receive, from the neighboring base station, a message indicating that the RAN paging has failed in the neighboring base station for the user equipment, wherein
the transmitter is configured to transmit, to a core network node, a message indicating that RAN paging for the user equipment has failed, and
the RAN paging is an operation in which the RAN performs a paging for the user equipment by a unit of the RAN paging area.
4. A base station included in a radio access network (RAN), comprising:
a receiver configured to receive, from a neighboring base station, a paging request that requests the base station to perform a RAN paging for the user equipment, the paging request including identification information of the user equipment and a discontinuous reception (DRX) configuration of the user equipment, wherein the RAN paging is an operation in which the RAN performs a paging for the user equipment by a unit of the RAN paging area;
a controller configured to perform the RAN paging based on the paging request received from the neighboring base station; and
a transmitter configured to transmit a message indicating that the RAN paging has failed in the neighboring base station for the user equipment to the neighboring base station.