PROBLEM TO BE SOLVED: To provide a road side radio apparatus capable of improving stability of communication in a transportation radio system for performing radio transmission of transportation information.SOLUTION: A road side radio apparatus is included in a transportation radio system in which transportation radio apparatuses including a plurality of road side radio apparatuses and one or a plurality of on-vehicle radio apparatuses can perform communication by transmitting/receiving radio signals in the same frequency band. The road side radio apparatus comprises: an antenna selection unit for selecting a use antenna to be used for communication with another transportation radio apparatus, from an antenna group; and a radio communication unit for transmitting/receiving radio signals to/from the other transportation radio apparatus, through the use antenna. The antenna selection unit selects the use antenna on the basis of a radio signal received by the radio communication unit in a predetermined period in which the one or the plurality of road side radio apparatuses other than the road side radio apparatus transmit radio signals.

    【課題】交通情報を無線伝送する交通無線システムにおける通信の安定性を向上させることが可能な路側無線装置を提供する。【解決手段】交通無線装置である複数の路側無線装置および1または複数の車載無線装置が、同じ周波数帯の無線信号を送受信することにより通信可能な交通無線システムにおける、路側無線装置であって、アンテナ群の中から、他の前記交通無線装置との通信に使用する使用アンテナを選択するアンテナ選択部と、前記使用アンテナを介して他の前記交通無線装置と無線信号を送受信する無線通信部とを備え、前記アンテナ選択部は、他の1または複数の前記路側無線装置が無線信号を送信する所定期間において前記無線通信部によって受信された無線信号に基づいて、前記使用アンテナを選択する。【選択図】図3


    Access

    Download


    Export, share and cite



    Title :

    ROAD SIDE RADIO APPARATUS


    Additional title:

    路側無線装置


    Contributors:

    Publication date :

    2015-08-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H04B TRANSMISSION , Übertragung / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze



    ROAD-SIDE RADIO AND RADIO COMMUNICATION SYSTEM

    FUJITA TAKU / YOSHIOKA SEIJI | European Patent Office | 2021

    Free access

    RADIO APPARATUS, ROAD SIDE COMMUNICATION APPARATUS, DETERMINATION METHOD, AND COMPUTER PROGRAM

    URAYAMA HIROSHI / HAYAMA KOJI / ASAO HIROTAKA et al. | European Patent Office | 2018

    Free access

    ROAD-SIDE RADIO UNIT, ANTENNA AND RADIO EQUIPMENT

    SHIMIZU RYOICHI / TSUDA YOSHIAKI | European Patent Office | 2016

    Free access

    Radio communication apparatus and network-side apparatus

    KASHIWASE SUSUMU | European Patent Office | 2020

    Free access

    RADIO COMMUNICATION APPARATUS AND NETWORK-SIDE APPARATUS

    KASHIWASE SUSUMU | European Patent Office | 2018

    Free access