Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1995-11-02
1998-08-18
Hudspeth, David R.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
34082536, H04M 1100, H04B 700
Patent
active
057970971
ABSTRACT:
A system for communicating location data regarding the present service area for a "roaming" cellular paging device in a paging system. Each cellular paging device monitors a cellular network control channel to detect a cellular system identification signal transmitted by a cellular mobile radiotelephone (CMR) system. If the cellular system identification signal does not match a preassigned code for a host CMR system associated with the paging system, it responds by transmitting an identification signal to the MSC via the cellular network control channel. This identification signal includes: (1) a unique identification code that identifies the source of the identification signal, and (2) at least a portion of the system identification signal that was received by the cellular paging device. The CMR system determines that the identification signal has been transmitted by a "roaming" device associated with another CMR system and, accordingly, sends the identification signal to a verification system. In turn, the verification system communicates with the paging system to update the current service location of the cellular paging device. This allows the paging system to send pages to the service area where the paging device is actually located rather than sending pages to all possible service areas.
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Comer Edward Irby
Roach, Jr. Peter Owen
BellSouth Corporation
Hudspeth David R.
Richardson Scott
LandOfFree
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