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2021年度基于多速率的无线移动AdHoc网络的研究.docx


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2021年度基于多速率的无线移动AdHoc网络的研究.docx
文档介绍:
思想是依据链路包丢失率和传输速率来选择从源节点到目标节点期望传输时间最短路 径。 首先用模糊Petri网进行建模, 接着提出期望介质访问时间路由算法(ExpectMediaVisiting
Time, EMVT)。 所以, 候选路由尽可能多地包含了高传输速率和低包丢失率链路, 能够充
分利用物理层多速率能力来提升网络吞吐量。 模拟试验表明, 期望介质访问时间路由算法比 最小跳数路由算法和仅仅考虑链路传输速率路由算法相比, 能够较大地提升了网络吞吐量并 降低时延。
(4)基于网络编码无线局域网中继算法

网络编码是二十一世纪信息领域一项新技术, 它既可提升网络吞吐量又可节省能量消耗。 现在研究结果关键是基于单速率传输, 但伴随无线网络技术和设备不停更新, 无线局域 网MAC层协议已经开始支持多速率传输。 本文将网络编码同无线局域网中多速率传输性质 相结合, 提出基于网络编码中继算法(RelayAlgorithm Based 0n Network Coding, RABNC),
而且分析了其相对传统中继算法时间降低率。 经过模拟试验表明, RABNC算法相对传统

中继算法最高能够节省17%传输时间。


关键词: 无线移动AdHoc网, 多速率, 多播, 时延。 调度, 模糊Petri网, 网络编码。













ABSTRACT



A Wireless Ad HOC Networks iS a set of nodes that can communicate with others in a multi—hop fashion without any assistance of fixed infrastructures and every node can move freely and relay data for others.Its main advantage is that it can be rapidly deployed without base station.
The Wireless Ad Hoe Networks Call be applied where pre·deployment of network infrastructure is
difficult or impossible, for example, mobile meeting, disaster areas, and armies on the march.
The IEEE 802.1 1 wireless media access standard in Wireless Ad Hoc Networks supports multiple data rates at the physical layer by employing different modulation and channel coding schemes.Nodes call utilize auto rate adaptation algorithm by automatically adapting the transmission rate tO best match the channel conditions, and achieves better network performance. Research on multiple transmission rates is very important for the advancement of Wireless Ad Hoe
Networks.This thesis studies four multi-rate issues for Wireless Ad Hoc Networks, including
minimi zing delay muiticast routing in multi—rate Wireless Ad Hoe Networks, scheduling based on multi-rate transmission in Wireless Ad Hoe Networks, multi-rate routing in Wireless Ad Hoe Networks based on fuzzy petri net, relay algorithm based on network coding in wireless local
network.

The main results ofthe thesis are辐follows:

(1)Minimizi
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