Position aided subscriber unit for a satellite cellular system
July 19, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDuplex communication transceiver with modulation cancellation Communication apparatus for transmitting and receiving signals on different frequency bands Position measuring system Positioning system for a vehicle Vehicle status monitor and management system employing satellite communication System and method for measuring a position of a moving object with a hybrid navigation apparatus Satellite-based position-determining system Mobile station equipment for a mobile radio telephone system Patent #: 4932072 InventorAssigneeApplicationNo. 554657 filed on 07/19/1990US Classes:455/556.2, Personal digitial assistant340/991, Position indication transmitted by vehicle after receipt of information from local station342/357.1, Combined with telecommunication455/13.2, With synchronizing of satellites or system455/404.2, Location monitoring455/427, Space satellite455/456.1, Location monitoring701/213Using Global Positioning System (GPS)ExaminersPrimary: Eisenzopf, Reinhard J.Assistant: Pham, Chi Attorney, Agent or FirmInternational ClassesG01S 005/02H04B 007/185 AbstractA subscriber unit for communicating with a satellite communication system. This subscriber unit receives and transmits digital data from satellites of a satellite communication system. In addition, the subscriber unit self-determines its own position and transmits this position to the satellites of the satellite communication system. In this way, the satellite communication sytem knows the position of each subscriber unit so that communications may be established more efficiently. In addition, the position of the subscriber unit is automatically determined from the received GPS signals and reported to the satellite communication system for other uses such as asset management and search and rescue operations.Other References
Field of SearchIncluding cloth coveringMISCELLANEOUS ATTACHMENTS AND FITTINGS With frequency stabilization (e.g., automatic frequency control) Synthesizer Transceiver controlling a separate transceiver or receiver Position indication transmitted by vehicle after receipt of information from local station VEHICLE POSITION INDICATION Including a satellite Position indicating (e.g., triangulation) Distance Having plural transmitters or receivers | |
