基于复制的DTN网络路由算法研究

摘要

DTN is a new kind of network which is suitable for the challenge environment,and it has good adaptability to the long delay and frequency interruption. At present,the research hotspots of DTN are transmission protocol,rout-ing algorithm, security protection and so on. This paper focuses on the research of DTN routing algorithm based on replication, Firstly, we introduce the DTN concept, structure, characteristics and applications, and then analyze the principle of four typical routing algorithm. Finally,we use simulation tools to simulate the routing algorithm,and com-pare the performance of the algorithm under different conditions. The experimental results show that the network fac-tors, such as node density, node cache and TTL, have a significant impact on the performance of the algorithm, and the different routing algorithms have their specific application scenarios.%DTN是一种适用于挑战环境的新型网络，对长延迟、频中断等恶劣条件具有良好的适应性。目前，人们对于DTN网络的研究热点主要集中在传输协议、路由算法、安全防护等方面。本文针对基于复制的DTN路由算法展开研究，首先介绍了DTN的概念、结构、特点及应用，然后分析了四种典型路由算法的原理，最后利用仿真工具实现了对路由算法的仿真，并对不同条件下的算法性能进行了对比。实验结果表明，节点密度、节点缓存和数据包生存时间等网络因素对于算法的性能都有着显著影响，不同路由算法均有其特定的适用场景。