Location detecting system and location detecting method of the location detecting system
First Claim
1. A location detecting system in which a location detecting apparatus is provided at each of one mobile object and other mobile objects, the location detecting apparatus being mounted on a mobile object and comprising:
- a location detecting unit configured to detect a location of the mobile object,a communication unit configured to perform communication, anda CPU unit configured to control the location detecting unit and the communication unit,the location detecting apparatus detecting the location of the mobile object upon power activation,each of the location detecting apparatuses comprising a GPS trajectory information processing unit configured to acquire GPS trajectory information of each of the mobile objects,the communication unit of the one mobile object broadcasting a request for the GPS trajectory information to the communication units of the other mobile objects,the communication units of the other mobile objects transmitting the held GPS trajectory information to the communication unit of the one mobile object when a distance to the one mobile object is equal to or less than a predetermined value,the GPS trajectory information processing unit of the one mobile object passing the GPS trajectory information from the other mobile objects to the location detecting unit,the location detecting unit of the one mobile object outputting the location information of the one mobile object based on the GPS trajectory information from the other mobile objects, andthe GPS trajectory information processing unit setting a request time-out time period in the broadcasting, wherein when the GPS trajectory information of the other mobile objects cannot be obtained within the request time-out time period, the predetermined value is set larger upon next broadcasting.
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Accused Products
Abstract
In a location detecting system, an on-vehicle device is provided at each vehicle a location detecting unit detecting a location of the vehicle, a communication unit, and a CPU unit controlling the location detecting unit and the communication unit. Each of the on-vehicle devices includes a GPS trajectory information processing unit acquiring GPS trajectory information of each of the vehicles, the communication unit broadcasts requests for the GPS trajectory information, the communication units of other vehicles transmit the held GPS trajectory information to the communication unit of one vehicle when a distance to the vehicle is less than a predetermined value, the GPS trajectory information processing unit passes the GPS trajectory information from the other vehicles to the location detecting unit, and the location detecting unit of the vehicle outputs the location information of the vehicle based on the GPS trajectory information.
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Citations
10 Claims
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1. A location detecting system in which a location detecting apparatus is provided at each of one mobile object and other mobile objects, the location detecting apparatus being mounted on a mobile object and comprising:
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a location detecting unit configured to detect a location of the mobile object, a communication unit configured to perform communication, and a CPU unit configured to control the location detecting unit and the communication unit, the location detecting apparatus detecting the location of the mobile object upon power activation, each of the location detecting apparatuses comprising a GPS trajectory information processing unit configured to acquire GPS trajectory information of each of the mobile objects, the communication unit of the one mobile object broadcasting a request for the GPS trajectory information to the communication units of the other mobile objects, the communication units of the other mobile objects transmitting the held GPS trajectory information to the communication unit of the one mobile object when a distance to the one mobile object is equal to or less than a predetermined value, the GPS trajectory information processing unit of the one mobile object passing the GPS trajectory information from the other mobile objects to the location detecting unit, the location detecting unit of the one mobile object outputting the location information of the one mobile object based on the GPS trajectory information from the other mobile objects, and the GPS trajectory information processing unit setting a request time-out time period in the broadcasting, wherein when the GPS trajectory information of the other mobile objects cannot be obtained within the request time-out time period, the predetermined value is set larger upon next broadcasting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A location detecting method of a location detecting system in which a location detecting apparatus is provided at each of one mobile object and other mobile objects, the location detecting apparatus being mounted on a mobile object and comprising a location detecting unit configured to detect a location of the mobile object, a communication unit configured to perform communication, and a CPU unit configured to control the location detecting unit and the communication unit, the location detecting apparatus detecting the location of the mobile object upon power activation, each of the location detecting apparatuses comprising a GPS trajectory information processing unit configured to acquire GPS trajectory information of each of the mobile objects,
the location detecting method comprising: -
a step of the communication unit of the one mobile object broadcasting requests for the GPS trajectory information to the communication units of the other mobile objects; a step of the communication units of the other mobile objects transmitting the held GPS trajectory information to the communication unit of the one mobile object when a distance to the one mobile object is equal to or less than a predetermined value; a step of the GPS trajectory information processing unit of the one mobile object passing the GPS trajectory information from the other mobile objects to the location detecting unit; a step of the location detecting unit of the one mobile object outputting the location information of the one mobile object based on the GPS trajectory information from the other mobile objects; and a step of the GPS trajectory information processing unit setting a request time-out time period in the broadcasting, wherein when the GPS trajectory information of the other mobile objects cannot be obtained within the request time-out time period, the predetermined value is set larger upon next broadcasting.
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Specification