文档介绍：摘要
无线网格网络（WMN）属于一种新型的无线宽带接入网，它结合了移动 Ad hoc 网络和
WLAN 两者的优势，具有更高的可靠性、更低的干扰以及更高的数据吞吐率，且其还具有自
组织、自愈和多跳的特点。
本文首先介绍了无线网格网络的起源、网络结构、标准化和关键技术，并与其他几种网
络进行比较，介绍了它们的不同之处，总结了 WMN 的优缺点和其应用。然后分析了 WMN
路由的特点及路由协议的分类，详细的分析了无线网格网络中一些广泛应用的路由协议，如
DSDV、DSR、AODV 和 ZRP 各自性能的优劣。
在混合结构的无线网格网络中，主要进行网关到移动 Mesh 终端的通信，由于终端的移
动性，网络中经常发生路由中断，传统的 AODV 路由协议在本地修复失败后，生成错误消息
并向网关广播，只有当网关收到该消息后，进行路由的重建，造成网络开销和时延均增加，
而且在这过程中网关仍始终向终端发送数据，丢包率将会增加，降低了网络的性能。为了解
决这些问题，将 AODV 协议进行改进，错误消息由边缘路由器代替网关处理，避免了错误消
息在未包含在路径中的路由器之间传播，防止了广播风暴的产生，边缘路由器还能缓存来自
网关的数据，提高了网络的吞吐量，改进后的协议称为 BM-AODV 协议。通过 NS2 仿真比
较分析，结果表明 BM-AODV 协议在数据包投递率、平均吞吐量、端到端延迟和路由开销性
能上均优于 AODV 协议。
关键词: 无线网格网络， AODV 协议 ，混合结构 ，NS2 仿真
I
Abstract
Wireless mesh network(WMN) is a new kind of wireless broadband access network，and it both
has the advantages of Mobile Ad hoc networks and WLAN .WMN is capable of higher reliability,
lower interference and higher data throughput. WMN is also dynamically self-organized,
self-healed and multi hop in nature.
In this paper, firstly, the origin of the Wireless Mesh Network, architecture, standardization, key
technology and the differences between WMN and other networks are introduced. And this paper
also summarizes the merit, demerit and application of WMN. Then detailed analysis on the
feature and classification of Wireless Mesh Network routing protocols and some routing protocols
which are widely applied in Wireless Mesh Network are introduced, such as DSDV,DSR, AODV
and ZRP are put forward through analysis on their advantages and disadvantages.
Most of the traffics come from gateway to mobile mesh clients in hybrid wireless mesh network.
Mobility of mesh clients may cause r