Telecommunications – Radiotelephone system – Emergency or alarm communication
Patent
1996-06-21
1999-08-31
Urban, Edward F.
Telecommunications
Radiotelephone system
Emergency or alarm communication
455445, 455457, 455521, H04Q 720
Patent
active
059466111
ABSTRACT:
A cellular telephone system includes a plurality of cell sites and a mobile telephone switching office. Call management, including selection of a cell site most appropriate for a call associated with a mobile unit, are made based on the geographic location of the mobile unit as opposed to the strength of the signal associated with the call. The geographic location of the mobile unit is precisely determined using a NAVSTAR global positioning system, or its equivalent. Each mobile unit includes a GPS receiver that receives information from a geostationary satellite to determine the precise location of the mobile unit. This position information is relayed to the cell site initially managing the mobile unit, and the mobile unit is handed off to a cell site that is most appropriate for the call. Initial selection of an entrance cell site is made based on signal strength, but further call management decisions are made based on location of the mobile unit.
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Dennison Everett
Duffy Timothy J.
Jones Scott L.
Nass Edwin L.
Pauley Gregory T.
Gernstein Terry M
Gesesse Tilahun
Sycord Limited Partnership
Urban Edward F.
LandOfFree
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