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Mobile Object Information Sharing System

  • US 20080043715A1
  • Filed: 04/07/2005
  • Published: 02/21/2008
  • Est. Priority Date: 04/07/2005
  • Status: Active Grant
First Claim
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1. A mobile object information sharing system comprising a plurality of mobile stations, wherein the mobile station includes:

  • a radio device for communicating mutually at one radio frequency;

    a GPS receiver that obtains, by GPS radio waves, at least position information and moving speed information of its own station and shared time information;

    a time division synchronous radio modem device that synchronizes mutually among the plurality of mobile stations using the shared time information, after this time synchronization, sets a fundamental transmission period by arranging continuously a plurality of transmission slots having a predetermined time width, transmits the position information of its own station to the radio device in an optional period of the plurality of transmission slots, and receives the position information of other mobile stations;

    a transmission period determining unit for determining the optional period using the moving speed of the mobile station; and

    an operation unit that determines a transmission timing among the plurality of transmission slots based on the optional period determined by the transmission period determining unit and transmits the position information of its own station.

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