改进的基于带宽的QoS多播路由算法.doc

文档介绍：
改进的基于带宽的 QoS 多播路由算法
李帅,蔡明**
(江南大学物联网工程学院,无锡 214122)
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摘要:为解决 Ad Hoc 网络中基于位置信息的多播路由协议(GEM)链路带宽没保障的问题,
通过对 GEM 路由算法的改进并进行大量的模拟实验,提出了一种改进的、提供 QoS 保障的
多播路由算法。该算法与原算法不同的地方在于:新的算法在原协议路由寻径的基础上对每
条链路的带宽加以约束,保证所选择的每条链路都尽可能满足传输数据要求的带宽约束。实
验数据表明,改进后的协议可以优化链路带宽,提供 QoS 保障,适用于节点密集的无线多
跳网络。
关键词:多播;QoS 约束;位置信息;带宽
中图分类号:TP393
Improved QoS multicast routing algorithm based on
bandwidth
LI Shuai, CAI Ming
(IOT School,Jiangnan University,Wuxi 214122)
Abstract: In order to solve the problem that there was no bandwidth guarantee for links of
GEographic Multicast routing protocol (GEM) in Ad works, through the improvement of
GEM routing algorithm and experiments, an improved routing protocol was proposed, which
provided QoS guarantee. The difference between the new agreement and the original one lay in
that the new agreement provided bandwidth restrictions on each pared to the original one,
ensuring that each link selected met the need of the bandwidth for data transmission. The
experimental data shows that the improved protocol can optimize bandwidth selection to provide
QoS guarantee,which is fit for wireless multi works with dense nodes.
Key words: multicast; QoS constranit; location information; bandwidth
0 引言
Ad Hoc 网络是一类由大量移动节点组成的无线自组织网络,每个节点配备有无线收发装置,可以方便
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用于紧急救援、监测预警、无线传感器网络等方面,在农林、生态、工程等领域的应用也日益深入。
Ad Hoc 网络中常用的通信方式有两种:单播和多播。单播是