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Method for controlling hand-off for home zone services in a mobile communications system
| Details |
Inventors: Jeong, Jin-Soo;
Assignee: Samsung Electronics Co., Ltd. (Gyeonggi-Do, KR)
Primary Examiner: Gary; Erika A.
Assistant Examiner:
Attorney, Agent or Firm: Cha & Reiter, L.L.C.
A method for controlling the hand-off of an MS (Mobile Station) for the home zone service in a mobile telecommunications system including a plurality of BTSs (Base Transceiver Stations), a BSC for controlling the BTSs, and an MSC (Mobile Switching Center) for connecting the BSC with a different BTS or network, comprising the steps of causing the MS to connect through the BTS with the BSC (Base Station Controller) by an outgoing or incoming call, causing the BSC to store the home zone list and the subscriber service class of the MS received from the MSC, and causing the BSC to perform the hand-off requested by the MS according to the home zone list and the subscriber service class. Thus, when the MS registered only in the fixed network, so as to be provided with communication services only in the home zone, travels through the other regions than the home zone, the BTS drops the presently connected call with an alert message. However, the MS registered both in the fixed and in the mobile network, so as to be provided with communication services both in the home zone and in the other regions, travels through the other regions, the BTS only sends an alert message to the MS without dropping the presently connected call. In this case, the BTS operator has discretion as to whether to send the alert message to the MS. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT For the application of the present invention, the MSC or HLR (Home Location Register) should have a data base storing the home zone list specifying information concerning the home zone of each MS, so that the MSC may search out the service class of the MS from the data base to determine whether the MS is registered in the fixed network or mobile network, or in both.
Referring to FIG.
2, the cells indicated by reference numerals 11 to 13 represent the home zones, and the reference numerals 21 to 27 represent the other regions not being the home zone.
The BTSs of the other cells 21 to 27 are registered in the data base.
Describing the operational principle of the invention in connection with FIG.
3, controlling the hand-off comprising the steps of establishing a call connection between the MS and the BTS providing the home zone service, in H110; causing the MS to request the hand-off in H120; determining whether the hand-off targeted BTS belongs to the home zone in H130; determining whether the MS is registered to be used only in the home zone when the hand-off targeted BTS does not belong to the home zone in H140; dropping the call connection when the MS is registered to be used only in the home zone in HI 50; and, performing the hand-off of the MS when the hand-off targeted BTS belongs to the home zone or when the MS is registered to be used both in the home zone and the other non-home zone regions, in H160.
Hereinafter, these steps are more specifically described.
In step H110, when the MS is connected with the BTS providing the home zone service through an outgoing or an incoming call, the BTS registers the home zone information of the MS received from the MSC.
The home zone information includes the home zone list and the subscriber service class of the MS, and this information is used for the BSC to determine the hand-off of the MS.
In this case, the home zone list indicates the list of the cells providing the home zone service to the MS and the subscriber service class as to whether the MS is registered in the fixed network or mobile network, or both
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Cell Phones 
