Terminal state control system

Abstract

When a terminal enters a cell of a personal-use base station (NBTS) arranged in a certain location area, the terminal receives a location area identifier having a number that is different from an identifier of the location area, and transmits a location updating request with the reception of the location area identifier as a trigger. On receiving the location updating request, a VLR or an NRNC having a registration table, in which the ID of the personal-use base station and the ID of a terminal allowed to use the personal-use base station are registered, judges whether the terminal issued the location updating request is the terminal allowed to use the personal-use base station by referring to the registration table. If the terminal issued the location updating request corresponds to the terminal allowed to use the personal-use base station, the terminal is placed under a status where it is capable of performing communication in the cell, and if not, the terminal is placed under a status where it is incapable of performing communication in the cell.

1 . A terminal comprising:
 a detection unit detecting entrance and exit into and from a cell of a specific base station that the terminal is allowed to use; and   an informing unit informing a user of the terminal of the entrance and the exit into and from the cell of the specific base station.   
   
   
       2 . A terminal according to  claim 1 , further comprising:
 a second informing unit, when the terminal is currently performing communication, informing the user of the terminal of whether the communication is performed using the specific base station.   
   
   
       3 . A terminal according to  claim 1 , further comprising:
 a storage unit storing identification information of the specific base station,   wherein the detection unit receives base station identification information periodically transmitted from at least one base station with which the terminal is communicable, and if identification information matching the identification information stored in the storage unit is contained in the received identification information, detects that the terminal has entered the cell of the specific base station.   
   
   
       4 . A terminal according to  claim 3 ,
 wherein after the terminal enters the cell of the specific base station, when reception of the identification information from the specific base station becomes impossible, the detection unit detects that the terminal has exited the cell of the specific base station.   
   
   
       5 . A terminal according to  claim 1 , further comprising:
 a selection unit, when selecting one of a plurality of base stations with which the terminal is communicable, if the specific base station is contained among the plurality of base stations, preferentially selecting the specific base station.   
   
   
       6 . A base station control apparatus that manages and controls a specific base station that is usable only by a terminal allowed to use the specific base station, comprising:
 a unit receiving a message relating to a handover, whose handover destination is a cell of the specific base station, from another base station control apparatus; and   a control unit uniformly rejecting processing relating to the handover based on the message from the another base station control apparatus.   
   
   
       7 . A base station control apparatus that manages and controls a specific base station that is usable only by a terminal allowed to use the specific base station, comprising:
 a registration table in which information concerning the terminal allowed to use the specific base station is registered;   a judging unit, with respect to a handover request whose handover destination is a cell of the specific base station, judging whether a terminal issued the handover request is the terminal allowed to use the specific base station by referring to the registration table; and   a control unit, if the terminal issued the handover request is the terminal allowed to use the specific base station, performing processing relating to the handover, and if not, rejecting the handover.   
   
   
       8 . A base station control apparatus according to  claim 6 ,
 wherein the control unit rejects the handover by, with respect to a request to secure a resource for the handover to the specific base station received from the another base station control apparatus, not transmitting the resource securing request to the specific base station but transmitting a resource securing failure message to the another base station control apparatus.   
   
   
       9 . A base station control apparatus according to  claim 7 ,
 wherein the control unit rejects the handover by, with respect to a request to secure a resource for the handover to the specific base station received from the another base station control apparatus, not transmitting the resource securing request to the specific base station but transmitting a resource securing failure message to the another base station control apparatus.   
   
   
       10 . A mobile communication system comprising:
 base stations forming a cell group in which communication service is provided to subscriber terminals wherein the zone registration for allowing communication in the zone of the cell group is not required for the subscriber terminals;   a managing unit operable to register and manage a subscriber terminal to which communication service in a certain cell other than any cells in the cell group is provided; and   a control unit operable to allow communication in the certain cell formed by a base station for the subscriber terminal managed by the managing unit.