Traffic management system
First Claim
1. A traffic management system for managing vehicle traffic, comprising:
- a vehicle-mounted unit having a vehicle-mounted communication unit having a function to communicate with a center device, for performing an interconnection process for user authentication when entering a predetermined radio-wave zone, using an individual vehicle ID assigned to each vehicle, and sending fault information in the event of a fault occurring on the vehicle;
a radio unit disposed on a road and having a radio communication unit having a function to provide the radio-wave zone for the vehicle and to relay communications between the center device and the vehicle-mounted unit, for sending interconnection process completion information to the center device when the interconnection process for connection to the vehicle is completed, receiving a predicted time at which the vehicle is expected to travel across the radio unit, and sending an overtime to the center device if the vehicle does not connect to the radio unit after elapse of the predicted time; and
a center device having a traffic information manager for, when the interconnection process completion information is received, calculating the speed of the vehicle from an inter-radio unit distance and an interconnection time at which the vehicle connects to the radio unit, calculating a predicted time at which the vehicle is expected to pass across a next radio unit from the speed of the vehicle and the distance up to the next radio unit, and sending the predicted time to the radio unit, for, when the fault information is received, sending traffic information including alarm information through the radio unit to vehicles traveling near a site where the fault has occurred on the vehicle, for, when the overtime is received, determining whether the fault has occurred or not, and for, when it is judged that the fault has occurred, sending traffic information including alarm information through the radio unit to vehicles traveling near a site where the fault has occurred on the vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
A traffic management system manages, distributes, and controls various traveling states of vehicles at a high quality level. A vehicle-mounted unit performs an interconnection process for user authentication when entering a predetermined radio-wave zone. A radio unit disposed on a road sends interconnection process completion information to a center device when the interconnection process for connection to the vehicle is completed. If the vehicle does not connect to the radio unit after elapsed of a predicted time at which the vehicle is expected to travel across the radio unit, then the radio unit sends an overtime to the center device. The interconnection process completion information is received, the center device calculates a predicted time at which the vehicle is expected to pass across a radio unit, and sends the predicted time to the radio unit. When the overtime is received, the center device determines whether a fault has occurred or not. When it is judged that the fault has occurred, the center device sends alarm information to vehicles traveling near a site where the fault has occurred on the vehicle.
-
Citations
11 Claims
-
1. A traffic management system for managing vehicle traffic, comprising:
-
a vehicle-mounted unit having a vehicle-mounted communication unit having a function to communicate with a center device, for performing an interconnection process for user authentication when entering a predetermined radio-wave zone, using an individual vehicle ID assigned to each vehicle, and sending fault information in the event of a fault occurring on the vehicle; a radio unit disposed on a road and having a radio communication unit having a function to provide the radio-wave zone for the vehicle and to relay communications between the center device and the vehicle-mounted unit, for sending interconnection process completion information to the center device when the interconnection process for connection to the vehicle is completed, receiving a predicted time at which the vehicle is expected to travel across the radio unit, and sending an overtime to the center device if the vehicle does not connect to the radio unit after elapse of the predicted time; and a center device having a traffic information manager for, when the interconnection process completion information is received, calculating the speed of the vehicle from an inter-radio unit distance and an interconnection time at which the vehicle connects to the radio unit, calculating a predicted time at which the vehicle is expected to pass across a next radio unit from the speed of the vehicle and the distance up to the next radio unit, and sending the predicted time to the radio unit, for, when the fault information is received, sending traffic information including alarm information through the radio unit to vehicles traveling near a site where the fault has occurred on the vehicle, for, when the overtime is received, determining whether the fault has occurred or not, and for, when it is judged that the fault has occurred, sending traffic information including alarm information through the radio unit to vehicles traveling near a site where the fault has occurred on the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A radio unit disposed on a road for providing a radio-wave zone for vehicles and relaying communications between a center device and a vehicle-mounted unit, comprising:
-
a center-side data communication unit for interfacing with the center device for communications therewith; a vehicle-side data communication unit for interfacing with the vehicle-mounted unit for communications therewith; and a radio communication unit for performing an interconnection process for connection to one or more of the vehicles and sending interconnection process completion information to the center device when the interconnection process is completed, receiving from the center device a predicted time at which each of the one or more vehicles is expected to pass to the radio unit, sending an overtime to the center device for enabling the center device to send traffic information to the one or more vehicles if any of the one or more vehicles do not connect to the radio unit after elapse of the predicted time, receiving from the center device alarm information including a notification ratio thereof, and sending the alarm information to the one or more vehicles at the notification ratio included in the alarm information when the one or more vehicles enter the radio-wave zone.
-
-
10. A center device for managing vehicle traffic, comprising:
-
a data communication unit for performing data communications with a radio unit disposed on a road; and a traffic information manager for, when interconnection process completion information sent from the radio unit is received, calculating the speed of the vehicle from an inter-radio unit distance and an interconnection time at which the vehicle connects to the radio unit, calculating a predicted time at which the vehicle is expected to pass across a next radio unit from the speed of the vehicle and the distance up to the next radio unit, and sending the predicted time to the radio unit, for, when fault information is received, sending traffic information including alarm information through the radio unit to vehicles traveling near a site where the fault has occurred on the vehicle, for, when an overtime is received, determining whether the fault has occurred or not, and for, when it is judged that a fault has occurred, sending traffic information including alarm information through the radio unit to vehicles traveling near a site where the fault has occurred on the vehicle.
-
-
11. A traffic management system for managing vehicle traffic, comprising:
-
a vehicle-mounted unit for sending individual identification information when entering a radio-wave zone; a plurality of radio units disposed on a road and providing radio-wave zones for vehicles, for receiving and relaying the individual identification information from said vehicle-mounted unit; and a center device for calculating a predicted time at which the vehicle is expected to pass across a next radio unit based on a time at which the individual identification information is received from said vehicle-mounted unit and distances between the radio unit that has received the individual identification information and the radio units disposed before and after said radio unit.
-
Specification