Mobile communication system
First Claim
1. A mobile communication system including a mobile communication roadside device for sending a predetermined signal to a predetermined area along a movement route, as well as for performing a predetermined communication operation with a mobile communication moving body-mounted device which responds to said predetermined signal, wherein said mobile communication roadside device comprises:
- movement condition detection means for detecting a movement condition along said movement route;
communication stoppage time setting means for setting a communication stoppage time in accordance with said movement condition detected by said movement condition detection means; and
communication stoppage time sending means for sending said communication stoppage time set by said communication stoppage time setting means after including communication stoppage time data indicative of said communication stoppage time in said predetermined signal.
1 Assignment
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Accused Products
Abstract
A mobile communication system for highway toll charging and the like includes road-side units which periodically poll vehicle-mounted units. When traffic near a road-side unit is slow, repeated polling of a given vehicle-mounted unit that has not moved out of the road-side unit'"'"'s communicable area may result in erroneous double charging of a toll. It is possible to set a fixed delay in the vehicle-mounted unit to avoid this; in this case, however, a toll may erroneously not be charged if the vehicle passes through the same or another road-side unit within the delay period. To solve this problem, the road-side unit calculates a response delay having a length appropriate to avoid the above-described effects based on the speed of vehicles passing it and transmits the response delay to the vehicle-mounted units.
67 Citations
7 Claims
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1. A mobile communication system including a mobile communication roadside device for sending a predetermined signal to a predetermined area along a movement route, as well as for performing a predetermined communication operation with a mobile communication moving body-mounted device which responds to said predetermined signal, wherein said mobile communication roadside device comprises:
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movement condition detection means for detecting a movement condition along said movement route; communication stoppage time setting means for setting a communication stoppage time in accordance with said movement condition detected by said movement condition detection means; and communication stoppage time sending means for sending said communication stoppage time set by said communication stoppage time setting means after including communication stoppage time data indicative of said communication stoppage time in said predetermined signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification