论文总字数：20465字

摘 要

Abstract II

第一章 绪论 1

1.1 DTN总体规定 1

1.2研究DTN的背景 1

1.3目前DTN的研究状态 2

1.4研究DTN的目的 3

1.5本次研究的主要方面 3

第二章DTN路由算法 5

2.1 DTN对比传统网络 5

2.2束层的功能 7

2.3数据传递过程 8

2.4主要的DTN路由算法 8

2.5本章小结 10

第三章 基于位置信息的DTN路由算法 11

3.1 两个基本算法 11

3.2 位置信息的两个要点 12

3.3 基于位置信息的Epidemic算法改进 12

3.3.1 基于距离的算法改进 12

3.3.2 基于寻找域的算法改进 13

3.4本章小结 14

第四章 运用ONE平台进行仿真 15

4.1关于ONE背景 15

4.2仿真的过程 18

4.4本章小结 26

总 结 27

参考文献 28

致 谢 31

DTN中基于位置信息的路由算法仿真分析

摘 要

在传统的网络中，传输控制协议/因特网互联协议（TCP/IP）协议被广泛的使用，不过，使用TCP/TP协议是需要满足条件的，它需要有稳定的链路环境，较短的时延，较高的链路安全性，以及端到端能保持不间断的传输。所以，有很多网络会不满足这种状况，比如星际空间网络，或者军事自组织网络，这些网络最大的特点就是非常不稳定，节点到节点之间的数据传输无法像传统网络那样依靠TCP/IP协议来进行，在这些情况下，时延容忍网络（Delay Tolerant Networks,以下简称DTN）网络被提出来并进行了研究。

在定位技术越来越成熟的今天，获取位置信息的可能也越来也大了。获得节点位置信息，然后在节点中加入位置信息这一要素，则在很多情况下，可以使原本的DTN路由算法得到优化，本次研究在原始的传染式路由的基础上，加入位置信息，得到了基于距离判断的传染式路由，并使用了机会网络仿真软件（The Opportunistic Network Environment simulator，以下简称ONE）平台进行了优化。

本文首先介绍了什么是DTN网络，将DTN网络和传统网络进行了对比，再介绍了一些已经研究出来的DTN算法，对他们进行分析。最后引入了位置信息这一要素，使用其对已有的路由进行深入的改进，对新的路由算法进行了仿真。

最后的分析结果表示，加入了位置信息的传染式路由对比原始的传染式路由，网络开销得到了很好的控制，而投递率也并没有下降，是一个性能有提升的算法。

关键词：DTN 传染式路由 位置信息 ONE

Simulation Analysis of Routing Algorithm Based on Location Information in DTN

Abstract

In the traditional network, TCP / IP protocol is widely used, however, the use of TCP / TP

protocol is required to meet the conditions, it needs to have a stable link environment, a shorter delay, higher link security , As well as end to end to maintain uninterrupted transmission.So,there are many networks will not meet this situation, such as interstellar space network, or military

self-organizing network, the biggest feature of these networks is very unstable, node-to-node data transmission between the traditional network can not rely on TCP / IP Protocol, in which case the DTN network was presented and studied.

With the continuous development of the current technology, positioning technology is more and more mature, if the network is more and more likely to get the location of the node, so if you can get through the network node location information, and then add the location information in the node In some cases, the original DTN routing algorithm can be optimized. Based on the original infectious route, the location information is added, and the route based on the distance judgment is obtained. The platform was optimized.

This paper first introduces what is the DTN network, compares the DTN network with the traditional network, introduces some of the DTN algorithms that have been studied, analyzes their advantages and disadvantages, and finally introduces the elements of location information. In the existing Based on the routing algorithm, the location information is added and the new routing algorithm is simulated.

The final analysis shows that the infectious route with the position information is compared with the original infectious route, the network overhead is well controlled, and the delivery rate does not decrease, and it is an improved algorithm.

Key Words: DTN;Epidemic Routing;Location Information;ONE

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