Communicating location data between personal digital assistant (PDA) devices

A personal digital assistant (PDA) 104 includes a global positioning system (GPS) module (88, fig.3) to determine geographic location information for the PDA 104. The PDA 104 also includes an L-band transceiver to broadcast the location information to at least one other PDA 106 and to receive locati...

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT R BERRY, JOSEPH EDWIN CARPENTER, HENRY FRANK GASBARRO
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES CALCULATING COMPUTING COUNTING DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY GYROSCOPIC INSTRUMENTS LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION SURVEYING TESTING TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	A personal digital assistant (PDA) 104 includes a global positioning system (GPS) module (88, fig.3) to determine geographic location information for the PDA 104. The PDA 104 also includes an L-band transceiver to broadcast the location information to at least one other PDA 106 and to receive location data from the other PDA 106 via a satellite 116. A display associated with the PDA 104 is updated according to the determined location information of the PDA 104 and the received location data from the other PDA 106. The PDA 104, 106 may also communicate with portable communication consoles 108, 110 in vehicle units or stationary computers 112, 114 within a ground station 115. Transmissions between the units 104-114 are preferably at reduced power levels, thus extending the useful life of batteries within the units.