Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Patent
1994-05-02
1996-10-01
Urban, Edward F.
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
455 331, 342357, H04B 7185
Patent
active
055618367
ABSTRACT:
A communication system qualifies access to the services it provides to subscriber units based upon the locations of the subscriber units. Subscriber unit location data are routed through a satellite to a gateway where a home subscriber information manager for the subscriber unit resides. This home gateway selects a service control area and corresponding serving gateway to use in establishing calls to and from the subscriber unit. When an area of uncertainty for the subscriber unit's location overlies a boundary between service control areas, additional location data may be obtained to shrink the area of uncertainty. If the area still overlies a boundary, a serving gateway is selected based upon the current serving gateway, the home gateway, and the service control area where the center of the area of uncertainty resides.
REFERENCES:
patent: 4233473 (1980-11-01), Frost
patent: 4993067 (1991-02-01), Leopold
patent: 5235633 (1993-08-01), Pennison et al.
patent: 5303286 (1994-04-01), Wiedeman
patent: 5343512 (1994-08-01), Wang et al.
patent: 5373298 (1994-12-01), Karouby
"Method Of Adapting A GSM Switch To A Moving Cell Environment" by Ken Sowles, Jan. 24, 1994.
Redden James P.
Sowles Kenneth L.
Terris David
Hall Phillip E.
Motorola Inc.
Urban Edward F.
Whitney Sherry J.
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