MOBILE TRACKING DEVICE FOR TRANSPORTATION INDUSTRY

摘要

A freight tracking system having sufficient accuracy for most commercial freight hauling purposes is disclosed. The system includes a mobile telephone transmitter (10) located in the freight or in the vehicle hauling the freight that automatically calls a telephone at the central reporting station (50). A caller reception unit (17) detects the calling number and current visited base station (81) information without answering the call and supplies it to a computer (18) at the central reporting station (50) which then determines the location of the shipment.