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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0555884 (1995-10-23) |
| 발명자 / 주소 |
|
| 인용정보 | 피인용 횟수 : 317 인용 특허 : 0 |
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 streng
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.
A cellular communications set up comprising: A) a cellular communications system; B) a system boundary defining an authorized area for said cellular communications system; C) at least one intra-system cell site that provides service within said authorized area; D) an MTSO for said cellular communica
A cellular communications set up comprising: A) a cellular communications system; B) a system boundary defining an authorized area for said cellular communications system; C) at least one intra-system cell site that provides service within said authorized area; D) an MTSO for said cellular communications system; E) a neighboring cellular carrier that provides service outside of said authorized area; F) at least one inter-system cell site that provides service outside of said authorized area, said at least one inter-system cell site being associated with said neighboring cellular carrier; G) said cellular communications system and said neighboring cellular carrier being subject to inter-system interference; H) locating means for determining the exact geographic location of a mobile unit, said locating means including means using a satellite communication system for establishing an exact geographic location of the mobile unit and for emitting a position signal of said exact geographic location; I) means for receiving said position signal and using that position signal to establish the exact geographic location of the mobile unit visa vis said at least one intra-system cell site in said cellular communications system; and J) data storage and comparison means in said MTSO responsive to said means for receiving the position signal and storing cell site geographic data for each intra-system cell site in said cellular communications system and effecting a comparison between said position signal and the cell site geographic data and selecting a chosen cell site that services the geographic location of the mobile unit for use by the mobile unit based on such comparison and accepting the call from said mobile unit if the chosen cell site provides service within said authorized area for reducing provision of cellular service by said cellular communications system outside of said authorized area and reducing interference between said cellular communications system and said neighboring cellular carrier.
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