Low Cost, Self Building AVL Networks Using Packet Radio

Paul Evans

Abstract:	This paper describes the principles behind the creation of vehicle tracking systems which can be used to map vehicle locations, transfer short messages, distribute bulletins, provide radio direction finding and weather information in a self-building network of stations. Typically, a PC is used by the base station and may access vector maps, disc based maps or CD-ROM. In- expensive packet radio modems are used at the base and in the vehicles. The vehicles use a compact integrated GPS receiver, packet modem and radio transceiver. Furthermore, the same network may be used to distribute private differential correction data to the remote vehicles. Hardware & software requirements are outlined and protocols, data formats and capabilities are detailed. The significance of such a system is demonstrated by the widespread world-wide system trials being undertaken by tens of customers and their progress towards production quantity systems.
Published in:	Proceedings of the 1996 National Technical Meeting of The Institute of Navigation January 22 - 24, 1996 Loews Santa Monica Hotel Santa Monica, CA
Pages:	333 - 338
Cite this article:	Evans, Paul, "Low Cost, Self Building AVL Networks Using Packet Radio," Proceedings of the 1996 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1996, pp. 333-338.
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