本文選題：空間網(wǎng)絡(luò)　切入點(diǎn)：衛(wèi)星星座　出處：《國防科學(xué)技術(shù)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：空間網(wǎng)絡(luò)路由協(xié)議一直是空間網(wǎng)絡(luò)領(lǐng)域研究的熱點(diǎn),空間網(wǎng)絡(luò)節(jié)點(diǎn)通常具有高度移動(dòng)性、資源相對受限、一旦部署便難于更換或升級等特點(diǎn),使得協(xié)議設(shè)計(jì)與入軌之前的地面仿真驗(yàn)證變得極其重要。盡管針對空間系統(tǒng)網(wǎng)絡(luò)化的研究已經(jīng)開展多年,但真正部署和運(yùn)行路由協(xié)議的系統(tǒng)尚少,其中一個(gè)重要的原因就是缺乏支持空間網(wǎng)絡(luò)路由協(xié)議設(shè)計(jì)與驗(yàn)證的綜合仿真平臺。現(xiàn)有的通用型網(wǎng)絡(luò)仿真平臺針對地面網(wǎng)絡(luò)設(shè)計(jì),無法模擬空間網(wǎng)絡(luò)的動(dòng)態(tài)拓?fù)渥兓?現(xiàn)有的航空航天仿真平臺專注于航空系統(tǒng)運(yùn)行環(huán)境和星座構(gòu)型等仿真,對于網(wǎng)絡(luò)協(xié)議仿真的支持非常有限。在此前提下,本課題旨在研究與實(shí)現(xiàn)一種面向空間網(wǎng)絡(luò)的路由協(xié)議設(shè)計(jì)與仿真驗(yàn)證綜合仿真平臺。圍繞該目標(biāo),開展的主要工作及貢獻(xiàn)如下:(1)設(shè)計(jì)并實(shí)現(xiàn)了一種面向空間網(wǎng)絡(luò)快照路由協(xié)議設(shè)計(jì)與驗(yàn)證的綜合仿真平臺SRDV。該平臺基于專業(yè)的航空仿真軟件和通用網(wǎng)絡(luò)仿真平臺進(jìn)行設(shè)計(jì),為兩個(gè)獨(dú)立領(lǐng)域的仿真系統(tǒng)搭建橋梁,并完成航天器與星間鏈路到空間網(wǎng)絡(luò)節(jié)點(diǎn)與鏈路之間的映射,使得空間網(wǎng)絡(luò)路由協(xié)議設(shè)計(jì)、實(shí)現(xiàn)、部署、驗(yàn)證與優(yōu)化變得非常方便;(2)通過仿真典型的衛(wèi)星星座,驗(yàn)證了SRDV平臺的功能正確性。通過對典型的Polar星座代表Iridium星座和典型的Walker星座代表Globalstar星座的仿真,對SRDV平臺支持快照路由協(xié)議設(shè)計(jì)的各個(gè)環(huán)節(jié)進(jìn)行了能力驗(yàn)證;(3)應(yīng)用SRDV平臺,設(shè)計(jì)并實(shí)現(xiàn)了一種基于快照序列的預(yù)置空間路由協(xié)議PSRP。利用SRDV平臺生成空間網(wǎng)絡(luò)的快照路由集,可以在空間網(wǎng)絡(luò)拓?fù)渥兓耐瑫r(shí)將路由表切換到對應(yīng)的路由表項(xiàng),從而省去了路由收斂的過程,提高了鏈路利用率,降低了報(bào)文丟包率。最后通過實(shí)驗(yàn)驗(yàn)證了PSRP協(xié)議的優(yōu)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.
【學(xué)位授予單位】：國防科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.04

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