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Communication system and suitable process for running a communication system

  • US 6,763,232 B1
  • Filed: 02/26/2001
  • Issued: 07/13/2004
  • Est. Priority Date: 07/03/1998
  • Status: Expired due to Fees
First Claim
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1. Communication system, for a mobile telephone system, comprising:

  • at least one first communication unit (V-1), which provides a first area by a first user unit (MS-1) with first subscriber identification data (IMSI-1) controlled by a first subscriber data module (SIM-1), andat least one second communication unit (V-VI), which provides a second area by a second user unit (MS-VI) with second subscriber identification data (IMSI-VI) controlled by a second subscriber data module (SIM-VI), a third communication unit (V-3), which provides a third area by a third user unit (MS-3) with third subscriber identification data (IMSI-3) controlled by a third subscriber data module (SIM-3), in which the first communication unit (V-1) and the third communication unit (V3) are connected to each other for using a total area consisting of the first area and the third area, and at least the second communication unit (V-VI) is connected with the third communication unit (V-3) for using a total area consisting of the second area and the third area, wherein the third subscriber identification data (IMSI-3) and the second subscriber identification data (IMSI-VI) are assigned to the second subscriber data module (SIM-VI) and the third subscriber identification data (IMSI-3) and the second subscriber identification data (IMSI-VI) contain a common profile, in order to provide to the subscriber the necessary and well-known service, and that a first switching unit is provided, which switches over from the second subscriber identification data (IMSI-VI) to the third subscriber identification data (IMSI3) when the second user unit (MS-VI) leaves the second area and enters the first area, to every communication unit being assigned an own PIN number, which differs from the PIN number of the first communication unit (V-1) by an additional cipher and is recognized by the first switching unit.

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