面向空间网络快照路由协议设计与验证的综合仿真平台研究

发布时间：2018-03-22 14:23

本文选题：空间网络　切入点：卫星星座　出处：《国防科学技术大学》2014年硕士论文　论文类型：学位论文

【摘要】：空间网络路由协议一直是空间网络领域研究的热点,空间网络节点通常具有高度移动性、资源相对受限、一旦部署便难于更换或升级等特点,使得协议设计与入轨之前的地面仿真验证变得极其重要。尽管针对空间系统网络化的研究已经开展多年,但真正部署和运行路由协议的系统尚少,其中一个重要的原因就是缺乏支持空间网络路由协议设计与验证的综合仿真平台。现有的通用型网络仿真平台针对地面网络设计,无法模拟空间网络的动态拓扑变化;现有的航空航天仿真平台专注于航空系统运行环境和星座构型等仿真,对于网络协议仿真的支持非常有限。在此前提下,本课题旨在研究与实现一种面向空间网络的路由协议设计与仿真验证综合仿真平台。围绕该目标,开展的主要工作及贡献如下:(1)设计并实现了一种面向空间网络快照路由协议设计与验证的综合仿真平台SRDV。该平台基于专业的航空仿真软件和通用网络仿真平台进行设计,为两个独立领域的仿真系统搭建桥梁,并完成航天器与星间链路到空间网络节点与链路之间的映射,使得空间网络路由协议设计、实现、部署、验证与优化变得非常方便;(2)通过仿真典型的卫星星座,验证了SRDV平台的功能正确性。通过对典型的Polar星座代表Iridium星座和典型的Walker星座代表Globalstar星座的仿真,对SRDV平台支持快照路由协议设计的各个环节进行了能力验证;(3)应用SRDV平台,设计并实现了一种基于快照序列的预置空间路由协议PSRP。利用SRDV平台生成空间网络的快照路由集,可以在空间网络拓扑变化的同时将路由表切换到对应的路由表项,从而省去了路由收敛的过程,提高了链路利用率,降低了报文丢包率。最后通过实验验证了PSRP协议的优越性。
[Abstract]:Spatial network routing protocols have always been a hot topic in the field of spatial networks. Spatial network nodes are usually highly mobile, resource is relatively limited, and once deployed, it is difficult to replace or upgrade. It makes the protocol design and ground simulation verification before going into orbit extremely important. Although the research on space system networking has been carried out for many years, there are few systems that actually deploy and run routing protocols. One of the important reasons is the lack of a comprehensive simulation platform to support the design and verification of routing protocols in space networks. The existing general network simulation platform can not simulate the dynamic topology changes of space networks because it is designed for terrestrial networks. The existing aeronautics and astronautics simulation platform focuses on the simulation of aeronautical system running environment and constellation configuration, and the support for network protocol simulation is very limited. The purpose of this paper is to study and implement a synthetic simulation platform for routing protocol design and simulation verification in space network. The main work and contributions are as follows: (1) Design and implement a comprehensive simulation platform SRDVwhich is oriented to the design and verification of snapshot routing protocol in space network. The platform is designed based on professional aviation simulation software and general network simulation platform. Build bridges for two independent simulation systems, and complete the mapping between spacecraft and intersatellite links to space network nodes and links, so that space network routing protocols are designed, implemented and deployed. Verification and optimization become very convenient) by simulating typical satellite constellations, the functional correctness of SRDV platform is verified. The simulation of typical Polar constellations representing Iridium constellations and typical Walker constellations representing Globalstar constellations, In this paper, the capability of supporting snapshot routing protocol design in SRDV platform is verified. (3) A preset spatial routing protocol based on snapshot sequence is designed and implemented using SRDV platform. The snapshot routing set of space network is generated by SRDV platform. At the same time, the routing table can be switched to the corresponding routing table items while the topology of the spatial network changes, thus eliminating the process of routing convergence, improving the link utilization rate and reducing packet loss rate. Finally, the superiority of PSRP protocol is verified by experiments.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.04

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