基于网络编码的空间DTN中CGR改进算法

发布时间：2018-01-11 09:11

本文关键词：基于网络编码的空间DTN中CGR改进算法　出处：《飞行器测控学报》2016年05期 　论文类型：期刊论文

【摘要】：随着空间通信技术的发展,卫星节点的增多,以及容延迟容中断通信需求的不断提高,空间DTN(Delay Tolerant Network,容延迟网络)环境中各通信节点间的路由技术日益重要,相继出现了多种适用于DTN的路由技术。基于空间DTN的结构与特点,对CGR(Contact Graph Routing,接触图路由)算法以及基于编码的路由算法进行了分析比较,然后针对空间DTN中CGR算法的缺点和不足,研究提出了基于NC(Network Coding,网络编码)的空间DTN中的CGR改进算法(NC-CGR),并通过仿真实验平台对算法性能进行了分析评估。仿真结果表明,相比于CGR算法,NC-CGR算法在链路传输时延、传输包裹数目、中继缓存大小、链路丢包率等不同条件下的适应性方面均表现出较大优势,更适用于具有复杂拓扑、带宽受限、高动态特性的空间DTN环境。
[Abstract]:With the development of space communication technology, the increase of satellite nodes, and the increasing demand of delay tolerance interrupt communication, the space DTN(Delay Tolerant Network is becoming more and more important. The routing technology among the communication nodes is becoming more and more important in the environment of delay tolerant network. There are many kinds of routing technologies suitable for DTN, which are based on the structure and characteristics of spatial DTN. The CGR(Contact Graph routing algorithm and the coding based routing algorithm are analyzed and compared. Then, aiming at the shortcomings and shortcomings of CGR algorithm in spatial DTN, this paper proposes a new algorithm based on NC(Network Coding. The improved CGR algorithm in the space DTN is analyzed and evaluated by the simulation platform. The simulation results show that the algorithm is better than the CGR algorithm. NC-CGR algorithm has great advantages in different conditions, such as link transmission delay, packet number, relay buffer size, link packet loss rate and so on, so it is more suitable for complex topology. Bandwidth limited, high dynamic spatial DTN environment.
【作者单位】：北京跟踪与通信技术研究所;深圳大学信息工程学院;
【基金】：国家863高技术研究发展计划(2015AA7034054A)
【分类号】：TN915.0
【正文快照】： CGR改进算法(NC-CGR)网络出版地址:http://www.cnki.net/kcms/detail/11.4230.TV.20161031.1539.020.html空间网络是由位于不同运行轨道的航天器平台载体以及相应的地面设施所组成的全空域网络,该网络通过航天器与航天器之间的星间链路以及航天器与地面之间的星地链路连接不同

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