摘要DTN（Delay Tolerant Network）即时延容忍网络/容迟网络，是指当通信不能确保端 到端路径的情况下，依附移动节点之间随机或主动的接触实现通信的网络。用来描述一 些特定的网络环境和应用场景，如车联网、空间通讯网络、传感器网络、军事移动网络 等。其基本的网络特征为：节点间的链路变化频繁，网络路由协议缺乏保障性和稳定性。 研究理解 DTN 的网络性能特点、网络路由技术、拓扑管理方法，有利于优化基于 DTN 网 络应用的性能与效率。本文在 ONE 机会网络仿真平台上对于各类通用路由算法进行比较 研究，从可靠性、开销、延时等角度分析各个路由算法的优劣程度，又改变环境参数， 分析了不同模拟环境对于路由协议的影响。针对 Epidemic 路由，本文提出基于节点距离 信息的路由算法（Distance-Based Epidemic，DBEpidemic），以提高 Epidemic 算法的 性能，从而更好地适应不同的应用场景，形成高效路由。74270

毕业论文关键词：时延容忍网络 DTN 路由协议 Epidemic

毕 业 设 计 说 明 书 外 文 摘 要

Title Analytical Study about DTN routing protocols based on the ONE simulation platform

Abstract DTN is the Delay Tolerant Network, which allows network communication to depend totally on the active or random contact between mobile nodes without complete communication links。 The network is used to describe some of the specific network environment and scenarios, such as Telematics, Space Communication Networks, Sensor Networks, Military Mobile Networks。 The basic characteristics of the network are that links between nodes change frequently, and network routing protocols lack of security and stability。 It is good to optimize the performance and efficiency of applications based on DTN networks by understanding features of DTN networks, network routing technology and topology management。 In this paper, we compare major routing algorithms based on the ONE simulation platform from several aspects such as reliability, overhead and latency to analyze pros and cons of every protocol algorithm, and we also change environmental factors to analyze the influence of different simulation environment on those routing protocols。 For the Epidemic routing, we propose the Distance-Based Epicemic(DBEpidemic) to improve the performance of it, so that it can adapt to different scenarios, and finally we can get the highly efficient routing。

Keywords:  Delay Tolerant Network, DTN Routing Protocols, Epidemic

本科毕业设计说明书 第 I 页

目 次

1 引言 1

1。1 DTN 网络的特点 1

1。2 DTN 发展现状 2

1。3 研究内容及意义 2

2 ONE 仿真平台 4

2。1 软件架构 4

2。2 仿真配置 5

3 DTN 路由协议的比较研究 7

3。1 路由协议分类 7

3。2 路由协议评估指标 8

3。3 路由算法性能对比 9

3。4 网络环境参数对路由算法性能的影响 12

4 Epidemic 协议改进 24

4。1 改进原理