Based ITS Intelligent Vehicle location and navigation system could be divided into three levels: autonomous navigation systems, communications systems and two-wayone-waycommunication system.
基于ITS的智能车辆定位导航系统可划分为三个层次:自主导航系统、单向通信系统和双向通信系统。
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The spread of mobile phones is one-way can also be a two-way, but also a two-way communication to even more, such a mode of transmission of a highly interactive.