深圳宏电基于GPRS的无线DDN系统组网及特点ENGLISH.doc

基于GPRS的无线DDN系统组网及特点 build and feature Wang Zhong Bi 王中碧 (Shenzhen Hongdian Technologies Co., Ltd. Shen, China) （深圳市宏电技术开发有限公司，广东，深圳518040） Summary: At recent years, 2.5 Generation mobile network (GPRSCDMA 1x and EDGE) has been used by many countries, they provide a wide coverage and reliable mobile data channel for business and industrial applications. This article will tell to reader how to build a network over cellular network and feature. .摘要：目前，基于GPRS无线数据传输业务广泛在移动办公、工业控制、远程遥测等多方面应用，网络运营商中国移动GPRS和联通CDMA各有其特点。文章详细描述了利用GPRS网络组建无线DDN网络的方法及特点。 Keys: General Packet Radio ServiceCode Division Multiple Access, Wireless DDN、DTU 关键词：General Packet Radio Service、Code Division Multiple Access、无线DDN、DTU Preface前言 society progress, the requirement of variational remote communication is increasing. Before the GPRS network showed up, the remote communication of signals are go through the telephone dial-up, wireless broadcast, lease link methods, but all these methods are deficient. The telephone dial-up method which dialup period is too long and line builds is difficult. The wireless broadcast method need solves the packages error rate, resist disturb problems, and that restrict is frequency of wireless committee and communication distance. The lease line method is impossible for big area, and the cost is really expensive. The GPRS based wireless digital data network adopt advanced mature GPRS communication module, based on stabilization reliable GPRS network, this solution will reduce communication cost to lowest. 随着社会的发展，各种设备远程通信的需求越来越多，在GPRS网络建设以前，设备的远程通讯通常采用电话拨号、无线电台、专线等方式，但这些方式均有很多不足之处。采用电话线传输数据，拨号过程长，而且线路建设有一定困难；采用无线电台，解决误码率、抗干扰是一个令人头疼的问题，而且受无委会频率管制的影响，在频率使用、传输距离上受一定限制；采用专线电路，不可能对所有大面积分散的数据采集子站进行专线铺设，更不能承担高昂的运行费用。 基于GPRS网络的无线DDN系统，采用先进成熟的GPRS DTU模块为远程传输模块，依托稳定、可靠的GPRS网络，在保证数据传输的及时、准确的前提下，将系统运行费用也降低到了最低。Introduction GPRS网络介绍GPRS is General Packet Radio Service built on the basis of GSM network to provide packet data service. It works at the same frequency band, the same mo