GSM无线通信技术在预警GIS领域中的应用模式

Studies on the Application Pattern of Wireless Communication Technology Based on GSM in the Fields of Alert GIS

GSM(Global System for Mobile Communication)是目前通信体制中最完善、最成熟,应用最广的一种数字移动通信网。基于GSM的短消息无线通讯技术以其传输信息及时、作用距离远、误码率低、成本低等优点,被广泛应用在水利、电力、环保、交通、防恐、天然气及自然灾害等领域。本文在个案建立的基础上,探讨了基于GSM的短消息技术在预警GIS领域中的应用模式,并对应用中所使用的若干通用的关键技术和规范进行了分析,提炼出了这种应用模式的共性问题,最后对这种应用模式的发展方向作了客观预测和展望。

This paper discussed the application pattern of wireless communication technology based on GSM to the fields of alert GIS. This application pattern includes data collecting and data receiving, the former is usually completed at some sites for data collecting, which are distributed discretely in the monitored areas. Each site is equipped with professional sensor, GSM terminal, software system and other auxiliary system for data collecting. Data receiving is always completed on the monitor server which is related to the collecting sites with ＂one to many ＂ relation. The data collected at each site will be coded following a specific format and sent to the monitor server through the net of GSM in a manner of short message. When the monitor server receives this kind of short messages, it will decode them following a previously stated protocol and pick up all sorts of needed information, for example, the name of the monitoring station, the spatial coordinate, the detected data and other information, and then the system of alert GIS will analyze these information synthetically and provide some measures to solve the emergencies. In addition, this article has also analyzed some key common technologies and criteria used in this application pattern, such as the rule to code short message, the AT commands to communicate with GSM terminal, the serial communication technology, the multi-thread and synchronization technology, the coding and decoding of the detected data, etc. Finally, it abstracted the commonness of this application pattern, and predicted and prospected the development trend of the application pattern.