초록 ▼

Method and apparatus for a base station or interrogator station to monitor the itinerary of one or more vehicles or other movable assets. Each vehicle or other movable object includes a satellite navigation receiver with circuitry for computing the geographic position of the object, and a memory for

Method and apparatus for a base station or interrogator station to monitor the itinerary of one or more vehicles or other movable assets. Each vehicle or other movable object includes a satellite navigation receiver with circuitry for computing the geographic position of the object, and a memory for storing a history of positions computed at a number of different times during the itinerary of the object. Each movable object further includes a radio transceiver which transmits the stored position history to the base station.

대표청구항 ▼

[ What is claimed is:] [1.] An itinerary monitoring apparatus attached to a mobile object, comprising:a satellite navigation receiver for computing the current geographic position of the mobile object;a memory;a controller for storing in the memory a plurality of successive itinerary data points at

[ What is claimed is:] [1.] An itinerary monitoring apparatus attached to a mobile object, comprising:a satellite navigation receiver for computing the current geographic position of the mobile object;a memory;a controller for storing in the memory a plurality of successive itinerary data points at intervals throughout the itinerary of the mobile object, wherein each successive itinerary data point includes a successive position computed by the navigation receiver and a time of day corresponding to that position; anda radio transceiver for receiving and transmitting messages by radio communication, wherein the transceiver transmits an itinerary data message containing a number of the itinerary data points stored in the memory.