A vehicle communication access network adaptive transmission mode selection system and method

The present invention discloses an adaptive transmission mode of a vehicle communication system and an access network selection method, the system comprising: I / B at a vehicle information service stream generating module, a vehicle information service traffic classification module, packet delivery module, adaptive transmission mode selection module, OFDMA radio resource configuration module, a frame transmission / reception module, access channel / traveling state / their geographic area information detection module, and a vehicle service flow information at the SV generation module, the vehicle classification information of the service flow mapping module, packet delivery module, the adaptive transmission mode selection module, OFDMA radio resource configuration module, a frame transmission / reception module, access channel / traveling state / their geographic area information feedback module. The present invention introduces and AMC OFDMA technology, to make a tradeoff between ITS information service system for transmitting streaming effectiveness and efficiency, so as to meet the various ITS information service flow QoS requirements as high as possible while obtaining the average effective data system Transmission rate.