一种基于方向天线和时间同步机制的多信道无线网状网MAC协议  

Multi-channel MAC Protocol of Wireless Mesh Networks Based on Directional Antennas and Time Synchronization Mechanism

作　　者：束永安[1] 李津生[1] 洪佩琳[1] 张瑞[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,安徽合肥230027

出　　处：《小型微型计算机系统》2007年第11期1996-2001,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60272043)资助.

摘　　要：在城市小区和广阔的农村建立低成本的无线网状网,为无线终端用户提供高速的接入服务,是一项极具现实意义的工作.设计了一种适合于此类网络的MAC层协议称为Mesh-MAC,该协议建立在已有的IEEE 802.11硬件产品基础上,每两个节点之间的通信是由一对方向天线完成,通过一种全新的时间同步方案,可以实现M ESH网内高效的数据转发.仿真结果表明,与IEEE 802.11及2P协议相比,Mesh-MAC协议在吞吐量和端到端传输延时等方面,都有明显的改善.It＇s of imminent importance to build wireless mesh networks as access networks for wireless users in city districts and countryside. This paper describes in detail a new MAC protocol ,called Mesh-MAC ,that is suited for such networks in terms of efficiency. The protocol is implemented on top of low-cost 802.11 hardware. By a novel network time synchronization mechanism,we realize packet-forwarding in the network based on per link forwarding that is formed by directional antennas. The simulation results indicate that Mesh-MAC protocol achieves much improvement in performance such as throughput and end-toend delay etc. compared with 802.11 and 2P protocols.

关 键 词：无线网状网 MAC协议 方向天线 时间同步 多信道 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]