无线Mesh网GPS同步技术的研究  

Research of synchronization technology based on GPS in wireless Mesh network

作　　者：武建侠[1] 鄢楚平[1] 齐文佳[1] 韩仲华[1] 程元[1] 

机构地区：[1]华北计算技术研究所,北京100083

出　　处：《计算机工程与设计》2009年第4期824-826,829,共4页Computer Engineering and Design

摘　　要：研究了时分、空分的无线Mesh网中通信节点之间的时隙同步问题的解决方案。传统的无线Mesh解决方案中使用全向天线加异步竞争信道的模式,节点之间的干扰随着网络规模的扩大而加剧,严重影响了通信效率。同步无现Mesh网引入时分和空分的机制,使通信节点在其预先分配到的时隙和对应方向的天线上进行通信,克服了全向、异步模式中的弊端,大大提高了通信效率。研究分析了同步Mesh网较异步Mesh网点优势和特点,以及同步精度对同步Mesh网性能的重要影响。设计并实现一种基于GPS秒脉冲的时隙同步算法,并在CPLD平台上实现该算法。The aim is to give a solution of time slot synchronization in wireless Mesh networks （WMN）. The traditional solution used full directional antenna in addition with asynchronous contention channel accession mechanism. The efficiency drops because interference between nodes became extremely worse when networks scale expanded. Nodes transmit and receive data in pre-allocated time slots and antenna to reduce interferences. It raised the efficiency a lot. Works are done about discussing features and advantages of synchronous WMN comparing with asynchronous WMN, and significance of synchronization accuracy to WMN. An algorithm of time slot synchronization based on GPS second pulse signal is proposed and realized on CPLD platform.

关 键 词：同步无线Mesh网 异步无线Mesh网 时隙同步 全球定位系统 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]