A vehicle onboard communication terminal in a mobile communication system that establishes vehicle-to-vehicle communication and road-to-vehicle communication by using a carrier wave and employs Carrier Sense Multiple Access/Collision Avoidance method includes: a reception processing portion that receives road-to-vehicle communication data transmitted from a roadside device and vehicle-to-vehicle communication data transmitted from a different vehicle onboard communication terminal; a transmission processing portion; a transmission control portion that controls an operation of the transmission processing portion and has a regular transmission mode and a passive transmission mode; and a determination portion. The transmission control portion detects usage of the carrier frequency when the transmission control portion is operating in the regular transmission mode. the transmission control portion stops the transmission of the vehicle-to-vehicle communication data and receives data addressed to the vehicle onboard communication terminal from the roadside device when the transmission control portion is operating in the passive transmission mode.


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    Title :

    Vehicle onboard communication terminal and mobile communication system


    Contributors:

    Publication date :

    2018-01-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr



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