无线传感器网络煤田火区监测系统的可靠性技术  

Reliability Technology of Coalfield Fire Zone Monitoring System of Wireless Sensor Networks

作　　者：肖杰[1] 闫述[1] 

机构地区：[1]江苏大学计算机科学与通信工程学院,镇江212013

出　　处：《无线通信技术》2011年第3期12-16,共5页Wireless Communication Technology

基　　金：国家高技术研究发展计划(863计划)(2006AA10Z258)

摘　　要：可靠性技术是无线传感器网络在煤田等大面积环境监测的关键,其中时钟同步和数据远程传输是两个中心环节。本文针对现有时间同步算法计算量大、对硬件要求高的不足,提出了线性拟和修正和自校正相结合的时间同步算法。在TCP/IP远程通信中,为了保证无线传感器网络与移动网络之间通信的可靠性,设计了Winsocket下的自适应心跳包技术,实现了判断远程传输网络连接状况、在网络堵塞或中断时自动重新连通。新疆松树头和大泉湖火区的无线传感器网络系统运行测试结果表明,本文时钟同步算法可以有效降低时间累计误差,心跳包技术可以实现稳定可靠的远程数据通信。The reliability technology is the key of the monitoring system's realization in coalfield fire zone.Time synchronization and the data transmission from the monitoring node to the center are two center taches of reliability.Most of the current time synchronization algorithms are computationally intensive and ask too much of hardware.A low power cost time synchronization algorithm based on error correction via linear fitting and local clock self-correction is proposed,which is simple and easy to implement on single chip microprocessor.A self-adapting heartbeat mechanism based on Winsocket has designed for keeping the reliability and stability of the TCP/IP remote communication.This self-adapting heartbeat mechanism can request to reconnect with remote clients or server when network is at the jam and inform or at the disconnection.The testing of the system running status indicated that the time synchronization algorithm can effectively reduce clock errors among the nodes of wireless sensor networks which are caused by time deviation,and the heartbeat mechanism had been improved the data communication's reliability and stability of the monitoring system and realized the system's maintenance-free.

关 键 词：无线传感器网络 煤田火区 时钟同步 远程数据传输 心跳包 可靠性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]