PROBLEM TO BE SOLVED: To prevent an oncoming vehicle from performing erroneous navigation by using simple graphic information provided by an optical beacon.SOLUTION: An optical beacon according to one aspect of the present invention relates to an optical beacon 4 for performing radio communication by an optical signal with an on-vehicle device 2 of a travelling vehicle 20. The optical beacon 4 comprises: an optical transmission/reception unit 11 for performing reception of an uplink frame made of an optical signal and transmission of a downlink frame made of an optical signal; and a communication control unit 7 that does not put simple graphic information defined below in a first downlink frame defined below, but puts the simple graphic information in a second downlink frame defined below. The first downlink frame is a downlink frame transmitted before receiving an uplink frame from the on-vehicle device. The second downlink frame is a downlink frame transmitted after receiving an uplink frame from the on-vehicle device. The simple graphic information is information including a simple graphic form in which road traffic information is patterned.

    【課題】 光ビーコンが提供する簡易図形情報を用いて対向車両が誤ったナビゲーションを行うのを防止する。【解決手段】 本発明の一態様に係る光ビーコンは、走行中の車両20の車載機2と光信号による無線通信を行う光ビーコン4に関する。光ビーコン4は、光信号よりなる上りフレームの受信と、光信号よりなる下りフレームの送信とを行う光送受信部11と、下記に定義する第1の下りフレームに下記に定義する簡易図形情報を含めず、下記に定義する第2の下りフレームに当該簡易図形情報を含める通信制御部7と、を備える。第1の下りフレーム:車載機から上りフレームを受信する前に送信する下りフレーム第2の下りフレーム:車載機から上りフレームを受信した後に送信する下りフレーム簡易図形情報:道路交通情報がパターン化された簡単な図形を含む情報【選択図】 図8


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    Title :

    OPTICAL BEACON


    Additional title:

    光ビーコン


    Contributors:

    Publication date :

    2015-12-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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