一种新的GEO-LEO双层星座路由算法

doi :10.3969/j.issn.1001-893x.2016.09.006引用格式:刘炯,陶波,李志军,等.一种新的GEO /LEO 双层星座路由算法[J].电讯技术,2016,56(9):982-989.[LIU Jiong,TAO Bo,LI Zhijun,

et al.A new GEO /LEO double-layered constellation routing algorithm[J].Telecommunication Engineering,2016,56(9):982-989.]

一种新的GEO /LEO 双层星座路由算法

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刘 炯1,陶 波**1,李志军2,张 琳1(1.西安通信学院信息安全系,西安710106;2.解放军65043部队,吉林通化135000)

摘 要:针对多层卫星星座网络的复杂通信环境和特殊应用背景,提出一种新的基于优先级的星上分布式路由算法(PDRA )三PDRA 算法采用新的分层管理策略,根据信息重要程度设置优先级,在拓扑快照起始时刻进行路由计算与更新,信息传输过程中采用拥塞回避策略三理论分析和仿真验证表明,PDRA 算法与现有典型卫星星座网络路由算法相比性能优越,能够很好地利用GEO /LEO 双层星座特点,有较低的数据丢包率和较高的吞吐量,可有效避免链路拥塞,并能保证重要信息实时可靠传输三

关键词:卫星网络;GEO /LEO 双层星座;路由算法;优先级;拥塞回避

中图分类号:TN927 文献标志码:A 文章编号:1001-893X (2016)09-0982-08

A New GEO/LEO Double -layered Constellation Routing Algorithm

LIU Jiong 1,TAO Bo 1,LI Zhijun 2,ZHANG Lin 1(1.Department of Information Security,Xi?an Communication Institute,Xi?an 710106,China;2.Unit 65043of PLA,Tonghua 135000,China)Abstract :According to the complex communication environment for multiple satellite constellations and the special application background,a new routing algorithm priority-based and on-board distributed rou-ting algorithm(PDRA)is proposed.A new hierarchical management strategy is proposed in PDRA algo-rithm.The packets priorities are set according to the importance of information and the routing calculation and updating of the routing is set at the beginning of the topology snapshot.A new congestion avoidance strategy is used in the information transfer process.Theoretical analysis and simulation results show that the PDRA algorithm has superior performance than other typical satellite constellation network routing algo-rithms as follows:it can take advantage the characters of GEO /LEO double-layered satellite constellation,has the lower data packet losing rate and higher throughput,and can avoid link congestion and guarantee real-time and reliable transmission of important information.Key words :satellite network;GEO /LEO double-layered satellite constellation network;routing algorithm;priority-based;congestion avoidance

1 引 言

卫星网络具有全球无缝覆盖二接入简单二可扩展

性强和带宽按需可变等优势,充分弥补了地面网络的不足,已成为地面网络的延伸部分和重要补充[1]三随着以 业务多样化二骨干传输可靠化二覆盖全球化 为主要特征的天基综合信息网的建设发四289四第56卷第9期2016年9月电讯技术Telecommunication Engineering Vol.56,No.9September,2016***收稿日期:2016-01-22;修回日期:2016-06-17 Received date :2016-01-22;Revised date :2016-06-17基金项目:全军军事学研究生课题资助项目(2011JY002-253,2015JY175)Foundation Item :The Graduate Program of Military Science Project (2011JY002-253,2015JY175)通信作者:3078269@https://www.360docs.net/doc/5a4077611.html, Corresponding author :3078269@https://www.360docs.net/doc/5a4077611.html,