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面向星間鏈路高動態(tài)網(wǎng)絡的路由規(guī)劃算法
2020年電子技術應用第11期
朱 鋒1,銀 皓1,白海通2,周 淦1
1.華北計算機系統(tǒng)工程研究所,北京100083; 2.中國人民解放軍陸軍參謀部,北京100044
摘要: 伴隨著航天技術的發(fā)展,衛(wèi)星導航系統(tǒng)的技術也在不斷提高。星間鏈路是在導航衛(wèi)星之間建立具有精密測量和數(shù)據(jù)傳輸功能的無線網(wǎng)絡,作為提高導航系統(tǒng)生存能力的重要手段,對衛(wèi)星導航系統(tǒng)的建設至關重要。其中,星間鏈路路由規(guī)劃算法作為星間鏈路技術的重要組成部分,也成為了星間鏈路技術的主要研究領域和方向之一。根據(jù)星間鏈路系統(tǒng)實際運行場景,結合了星間鏈路網(wǎng)絡的特點,綜合考慮數(shù)據(jù)傳輸時延和衛(wèi)星節(jié)點負載等多種評價指標,基于廣度優(yōu)先算法思想,輔以多種剪枝策略,提出了一種基于多評價因子的路由規(guī)劃算法。該算法能夠在應用于高動態(tài)時變網(wǎng)絡下尋找前N條最優(yōu)路徑。同時,對從節(jié)點間建鏈路徑條數(shù)、節(jié)點建鏈情況、路徑的開銷代價等多種角度對于路由算法的規(guī)劃結果進行分析驗證,為星間鏈路路由規(guī)劃中路徑的篩選提供理論依據(jù)。
中圖分類號: TN927
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.200422
中文引用格式: 朱鋒,銀皓,周淦. 面向星間鏈路高動態(tài)網(wǎng)絡的路由規(guī)劃算法[J].電子技術應用,2020,46(11):18-22.
英文引用格式: Zhu Feng,Yin Hao,Zhou Gan. Routing planning algorithm for high dynamic inter satellite link networks[J]. Application of Electronic Technique,2020,46(11):18-22.
Routing planning algorithm for high dynamic inter satellite link networks
Zhu Feng1,Yin Hao1,Bai Haitong2,Zhou Gan1
1.National Computer System Engineering Research Institute of China,Beijing 100083,China; 2.The Staff Department of People′s Liberation Army,Beijing 100044,China
Abstract: With the development of space technology, the technology of satellite navigation system is also improving. Inter satellite link is a wireless network with precise measurement and data transmission functions between navigation satellites. As an important means to improve the survivability of navigation system, it is very important for the construction of satellite navigation system. As an important part of inter satellite link technology, inter satellite link routing algorithm has become one of the main research fields and directions of inter satellite link technology. According to the actual operation scenario of the inter satellite link system, combined with the characteristics of the inter satellite link network, considering a variety of evaluation indexes such as data transmission delay and satellite node load, based on the idea of breadth first algorithm, supplemented by a variety of pruning strategies, this paper proposes a multi evaluation factor based routing planning algorithm. The algorithm can find the first N optimal paths in high dynamic time-varying networks. At the same time, this paper analyzes and validates the planning results of routing algorithm from many aspects, such as the number of paths between nodes, the situation of nodes building chains, the cost of path overhead and so on, so as to provide a theoretical basis for the selection of paths in the inter satellite link routing planning.
Key words : inter-satellite link;route planning algorithm;high dynamic network;breadth-first-search

0 引言

    隨著衛(wèi)星導航系統(tǒng)不斷發(fā)展,利用星間鏈路技術實現(xiàn)導航系統(tǒng)的自主導航已經(jīng)成為了新一代導航系統(tǒng)的發(fā)展方向[1]。目前,全球四大導航系統(tǒng)除GPS已經(jīng)建成星間鏈路系統(tǒng)外,都在朝著融入星間鏈路技術的導航星座方向邁進[2]。星間鏈路技術能夠極大提高全球衛(wèi)星導航系統(tǒng)的精度和自主運行能力,減少對地面站的依賴,并進一步縮短全網(wǎng)路由時延,提高全網(wǎng)傳輸容量[3]。有關星間鏈路的技術研究主要集中在星間鏈路的拓撲設計方案和星間鏈路路由算法兩方面[4]路由規(guī)劃算法基于導航星座網(wǎng)絡的拓撲建鏈,對網(wǎng)絡中的數(shù)據(jù)傳輸進行性能優(yōu)化,保證數(shù)據(jù)的高效傳輸。

    目前,關于導航星座網(wǎng)絡的路由算法規(guī)劃研究有很多。并從不同方向上給出多種研究成果。文獻[1]提出將DTN中的CGR啟發(fā)式算法應用于星間鏈路網(wǎng)絡,并進行了可行性分析和驗證。文獻[2]基于Dijkstra算法思想,提出一種綜合考慮等待時延、鏈路速率、傳輸距離等多因子的混合路由策略。文獻[3]將演化圖模型用于星間鏈路網(wǎng)絡,并對演化圖最早到達路徑算法時延性能進行仿真模擬。文獻[4]提出了最少跳數(shù)最早到達時間路由算法。文獻[5]則對文獻[4]中的CGR路由算法在星間鏈路網(wǎng)絡中的應用進行了改進,提高其適用性。文獻[6]提出了一種應用于低軌星間鏈路中,基于自適應調制編碼策略的QoS時延約束的前N條最短路徑算法。文獻[7]則從對星間鏈路評價因子權重參數(shù)的選取角度進行了探究和驗證。

    本文提出的路由規(guī)劃算法基于廣度優(yōu)先算法思想,以傳輸時延和衛(wèi)星負載等多種評價指標為開銷代價,尋找衛(wèi)星節(jié)點之間通信開銷代價最小的前N條最優(yōu)路徑。同時,對路由算法的有效性和正確性進行了多角度驗證工作,為星間鏈路的路由算法中路徑篩選提供依據(jù)。




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作者信息:

朱  鋒1,銀  皓1,白海通2,周  淦1

(1.華北計算機系統(tǒng)工程研究所,北京100083;

2.中國人民解放軍陸軍參謀部,北京100044)

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