Mobile communication system, base station and user equipment

Abstract

A UE in an idle state selects any of a group A, to which a cell of which coverage its own device is in, belongs and a group different from the group A, for example, a group B, and then measures cells belonging to the selected group for selecting a cell being a re-selection destination. A UE in a connected state selects any of the group B to which a cell connected with the UE belongs and a group different from the group B, for example, the group A, and measures cells belonging to the selected group for handover.

1 . A mobile communication system comprising:
 a user equipment and   a base station configured to perform radio communication with the user equipment,   wherein the base station is configured to notify the user equipment of base station group information.   
     
     
         2 . The mobile communication system according to  claim 1 , wherein the base station group information is notified from the base station to the user equipment by using a signal for dedicatedly notifying the user equipment of information. 
     
     
         3 . The mobile communication system according to  claim 1 , wherein the base station group information is notified from the base station to the user equipment by using a Radio Resource Control (RRC) signaling. 
     
     
         4 . The mobile communication system according to  claim 1 , wherein the base station group information includes an identifier of a base station group. 
     
     
         5 . The mobile communication system according to  claim 1 , wherein the base station group information includes a list of base stations configuring a base station group. 
     
     
         6 . The mobile communication system according to  claim 5 , wherein the list is a list of identification information for identifying base stations configuring the base station group. 
     
     
         7 . The mobile communication system according to  claim 1 , wherein the base station group information is information determined by the base station. 
     
     
         8 . The mobile communication system according to  claim 1 , wherein the base station group information is information indicating a base station group to which the base station belings. 
     
     
         9 . The mobile communication system according to  claim 1 , wherein the base station group information is notified from the base station to the user equipment as a broadcast information. 
     
     
         10 . A base station configured to perform radio communication with a user equipment,
 wherein the base station is configured to notify the user equipment of base station group information.   
     
     
         11 . A user equipment configured to perform radio communication with a base station,
 wherein the user equipment is configured to receive base station group information notified from the base station.