【摘要】：隨著航天技術的飛速發(fā)展,人們已經掌握了成熟的衛(wèi)星控制技術,空間信息網絡的廣泛應用也給人們的生活帶來了極大的便利。作為地面網絡的延伸,它有著極大的發(fā)展空間,而由于其在軍事領域的重要性,它已經成為各國在信息領域內最重要的發(fā)展方向之一�？臻g信息網絡不同于傳統(tǒng)地面網絡,它具有傳播時延大、鏈路誤碼率高、網絡拓撲變化快、節(jié)點資源受限等特點,導致了鏈路無法長時間存在端到端路徑。也正因此,傳統(tǒng)地面網絡的路由技術無法在空間信息網絡中高效的運行。本文首先介紹了空間信息網絡的概念、網絡架構及其網絡特點;然后分析了TCP/IP協(xié)議體系在空間信息網絡中的局限性,并介紹了DTN協(xié)議體系以及CCSDS協(xié)議體系;之后對已有的空間信息網絡路由算法進行分類,并指出現(xiàn)有算法的不足之處,提出了空間信息網絡的最短時延路由算法,該算法充分利用鏈路的連通時序,計算出端到端的最短時延路徑,并提高的算法的運算效率;針對Bundle標準協(xié)議進行適當修改,給出了具體的Bundle協(xié)議實現(xiàn)框架以及子模塊的詳細流程圖;最后搭建空間信息網絡實驗平臺,對本文提出的算法和Bundle協(xié)議進行測試,設置不同的場景,統(tǒng)計分析測試數(shù)據(jù),證明了該算法和協(xié)議的可行性和高效性。
[Abstract]:With the rapid development of space technology, people have mastered the mature satellite control technology, and the wide application of space information network has brought great convenience to people's life. As an extension of the ground network, it has a great space for development, and because of its importance in the military field, it has become one of the most important development directions in the field of information. The spatial information network is different from the traditional terrestrial network. It has the characteristics of large propagation delay, high link error rate, fast network topology change and limited node resources, which leads to the link can not exist end-to-end path for a long time. Therefore, the traditional routing technology of terrestrial network can not run efficiently in spatial information network. This paper first introduces the concept, network architecture and network characteristics of spatial information network, then analyzes the limitations of TCP/IP protocol system in spatial information network, and introduces the DTN protocol system and CCSDS protocol system. After that, the existing routing algorithms of spatial information network are classified, and the shortcomings of the existing algorithms are pointed out, and the shortest delay routing algorithm of spatial information network is proposed, which makes full use of the connected time sequence of the link. The shortest end-to-end delay path is calculated and the computational efficiency of the algorithm is improved. According to the appropriate modification of Bundle standard protocol, the implementation framework of Bundle protocol and the detailed flow chart of the sub-module are given. Finally, the experiment platform of spatial information network is built, the algorithm and Bundle protocol proposed in this paper are tested, different scenarios are set up, and the test data are statistically analyzed, which proves the feasibility and high efficiency of the algorithm and protocol.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN927;V443.1

【參考文獻】

相關期刊論文 前1條

1 楊元喜;;北斗衛(wèi)星導航系統(tǒng)的進展、貢獻與挑戰(zhàn)[J];測繪學報;2010年01期

，

本文編號：2427994