道路运输车辆卫星定位系统 北斗兼容车载终端通讯协议技术规范 GNSS sy stem for operating v ehicles —General specifications for the commu nication protocol and data format of BD compatible v ehicle terminal 中华人民共和国交通运输部发布 二〇一三年一月 I 目 次 前言.................................................................................................................................................................... IV 1 范围.................................................................................................................................................................. 1 2 规范性引用文件.............................................................................................................................................. 1 3 术语和定义、缩略语...................................................................................................................................... 1 3.1 术语和定义........................................................................................................................................... 1 3.2 缩略语................................................................................................................................................... 2 4 协议基础.......................................................................................................................................................... 3 4.1 通信方式............................................................................................................................................... 3 4.2 数据类型............................................................................................................................................... 3 4.3 传输规则............................................................................................................................................... 3 4.4 消息的组成.....................................................
