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。
Based ITS Intelligent Vehicle location and navigation system could be divided into three levels: autonomous navigation systems, communications systems and two-way one-way communication system.
运用北斗双星导航定位系统的双向短报文通信技术，实现了区域报警和行驶车队之间的通信以及寻迹。
It also realizes area alarm, communication and seeking among the running vehicles depending on BeiDou 's both-direction and short-message communicating technique.
首先，通过双星定位系统双向链路获取定时定位信息，将双向测距数据及时问同步误差数据进行处理、保存；
At first, synchronization information from the Tow_stay located system, disposes and saves the data of synchronization time and distance detacted.
运用北斗双星导航定位系统的双向短报文通信技术，实现了区域报警和行驶车队之间的通信以及寻迹。
It also realizes area alarm, communication and seeking among the running vehicles depending on BeiDou's both-direction and short-message communicating tech...
运用北斗双星导航定位系统的双向短报文通信技术，实现了区域报警和行驶车队之间的通信以及寻迹。
It also realizes area alarm, communication and seeking among the running vehicles depending on BeiDou's both-direction and short-message communicating tech...
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