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本文讨论了城市防洪监控系统研制中关于数据传输协议设计的必要性，着重探讨了针对不同通信方式和使用环境设计相应的数据传输协议的方法。城市防洪监控系统由计算机通信网络和有关的外部设备组成，其硬件技术、网络系统软件以及底层传输协议都已经很成熟，然而和用户直接相关的应用层数据传输协议却需要用户根据系统的应用需要自行设计。本文分别介绍了城市防洪监控系统中各点之间用单工和双工方式进行数据传输的方式
This article discusses the necessity of design of data transmission protocol in the development of urban flood control and monitoring system, and focuses on the design of corresponding data transmission protocols for different communication methods and environments. Urban flood control system consists of computer communication network and related external equipment, its hardware technology, network system software and the underlying transport protocol are already very mature, but the user-related application layer data transfer protocol requires the user according to the system application needs Design by yourself. This article separately introduced the city flood control system between each point uses the simplex and the duplex way to carry on the data transmission the way