Automatic Vehicle Location (AVL) Communication Methods for DGPS Based Systems

Michael S.K. Sushko

Abstract:	Automatic Vehicle Location (AVL) systems are now becoming feasible using GPS as the primary positioning/location system. To make AVL useful for vehicle tracking, it will be necessary to get vehicle position updates on a timely basis to a central site. To maintain the necessary DGPS correction and the vehicle position rates, it is going to place a load on the data communication system. In AVL systems, the data communication links are most important part and will determine if the AVL system successfully works. Traditional forms of VHF and UHF data communication methods using mobile radio and packet data modems are reviewed in this paper. The paper also reviews using existing cellular networks with a cellular modem product as a possible data communication link. The promising new radio-packet services such as Motorola’s ARDIS network and RAM Mobile Data’s MOBI’TEX service will be examined in detail. These services offer radio-packet data services in all major cities and are designed to handle large amounts of data message traffic. However, some of issues with these services is the cost and the real-time message delays.
Published in:	Proceedings of the 1993 National Technical Meeting of The Institute of Navigation January 20 - 22, 1993 Parc 55 Hotel San Francisco, CA
Pages:	179 - 193
Cite this article:	Sushko, Michael S.K., "Automatic Vehicle Location (AVL) Communication Methods for DGPS Based Systems," Proceedings of the 1993 National Technical Meeting of The Institute of Navigation, San Francisco, CA, January 1993, pp. 179-193.
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