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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0911971 (1992-07-10) |
| 발명자 / 주소 |
|
| 인용정보 | 피인용 횟수 : 538 인용 특허 : 0 |
A vehicle location system which provides a plurality of cellular systems that each includes a memory for identifying the cellular subscriber stations that are based in the particular system and visiting cellular subscriber stations based in another of the systems. The plurality of cellular systems i
A vehicle location system which provides a plurality of cellular systems that each includes a memory for identifying the cellular subscriber stations that are based in the particular system and visiting cellular subscriber stations based in another of the systems. The plurality of cellular systems include a roaming network that interconnects and transfers data in the memory relative to the presence of home and visiting cellular subscriber stations in the systems. An interface computer is provided to interconnect with at least one of the plurality of cellular systems. The interface computer accesses data in the roaming network relative to predetermined cellular subscriber stations. A location computer interconnects with the interface computer and translates the interface computer data relative to these predetermined cellular subscriber stations into location data that indicates the position of each cellular subscriber stations based upon the known position of the particular cellular system in which the subscriber station is currently registered. A user interface, that may include messaging systems and an electronic mail system, interconnect between a user and the location computer and allows access to location and related data relative to specified fleets of subscriber stations.
A vehicle location system for tracking geographical position of a cellular subscriber station free of establishing a telephone connection with the cellular subscriber station, wherein the system tracks the geographical position over a wide geographical area that includes a plurality of cellular tele
A vehicle location system for tracking geographical position of a cellular subscriber station free of establishing a telephone connection with the cellular subscriber station, wherein the system tracks the geographical position over a wide geographical area that includes a plurality of cellular telephone systems connected by a roaming network, wherein each of the cellular telephone systems includes a memory for holding data that (1) identifies cellular subscriber stations based in that cellular telephone system, (2) identifies visiting cellular subscriber stations based in other cellular telephone systems and (3) identifies that particular cellular telephone system, and wherein the roaming network includes means for transferring the data in the memory between the cellular telephone systems connected by the roaming network, wherein each cellular telephone system also includes means for accessing the data to, at least one of, (1) establish a telephone connection and (2) maintain a telephone connection with cellular subscriber stations based in that cellular telephone system that are visiting other cellular telephone systems connected by the roaming network, the vehicle location system comprising: an interface connected to the memory of at least one of the plurality of cellular telephone systems connected by the roaming network and including means for accessing the data relating to the cellular subscriber station, and means for reading the data identifying the cellular telephone system in which the cellular subscriber station is currently present; and means, interconnected with the interface, for translating the data relating to the cellular subscriber station into location data indicative of the geographical position of the cellular subscriber station based upon the geographical position of the cellular telephone system in which the cellular subscriber station is present.
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