IEEE 802.11, the most popular standard, defines the protocols which covers all of Ethernet based wireless communication.
IEEE 802.11标准定义了能够统筹所有基于以太网的无线通信的协议。
Locomotive software was mainly divided into audio capture and compression module, file storage management module, wireless Ethernet data download module, MAX485 communication module;
车载软件主要划分为语音采集压缩模块、文件存储管理模块、无线以太网数据下载模块、MAX485通信模块；
Three kinds of transmission including RS485, wireless GPRS, Ethernet, the paper introduced the three forms of communication working principle and use.
三种传输方式部分包括RS485、无线gprs、以太网传输，文中分别介绍了这三种通讯方式的工作原理和使用情况。
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