基于多径的低轨卫星网络路由拥塞控制策略  

Multipath routing based congestion control strategy for LEO satellite networks

作　　者：焦媛媛 田丰[2] 石神 刘洁[2] 刘会杰[1,2,3] JIAO Yuan-yuan;TIAN Feng;SHI Shen;LIU Jie;LIU Hui-jie(Chinese Academy of Sciences,Shanghai Institute of Microsyst ＆ Information Technology,Shanghai 200050,China;Chinese Academy of Sciences,Shanghai Engineering Center for Microsatellites,Shanghai 201203,China;School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]中国科学院上海微小卫星工程中心,上海201203 [3]上海科技大学信息科学与技术学院,上海201210 [4]中国科学院大学,北京100049

出　　处：《电子设计工程》2018年第18期113-117,122,共6页Electronic Design Engineering

基　　金：国家自然科学基金(91738201);上海市青年科技启明星计划资助(17YF1418200)

摘　　要：与高轨通信卫星相比,低轨卫星网络具有时延短、开销低、可重构等多个优点,成为卫星通信的主要发展方向。卫星通信业务需求的急剧增长和全球卫星通信业务需求的不均匀分布,造成链路阻塞,进而影响通信质量。因此,如何避免链路拥塞,提高低轨卫星网络路由的鲁棒性成为亟待解决的问题。本文提出一种新的基于多径的低轨卫星网络路由拥塞控制策略,利用多径规避拥塞,提高传输鲁棒性。并以铱星星座为仿真场景,对本文提出的路由策略和单径路由算法进行仿真。仿真结果表明,本文提出的路由策略在通信资源利用率、业务满足率等方面优于单径路由算法,能够有效地均衡网络负载,具有良好的扩展性。Compared with the GEO communications satellites,LEO satellite network has the advantages of short time delay,low cost,reconfigurable,and becomes the main research direction of satellite communications. The rapidly increasing demand for satellite communications and uneven distribution of satellite communication demands result in link congestion which will affect the quality of communication.Therefore,how to avoid link congestion and improve the robustness of LEO satellite network routing are urgent problems. In this paper,a new routing congestion control strategy based on multipath in LEO satellite network is proposed,which avoids congestion by using multipath and improves transmission robustness. Taking the Iridium constellation as the simulation scenario,we simulate the routing strategy proposed in this paper and single-path routing algorithm. The simulation results show that the routing strategy proposed in this paper is better than the existing single-path routing algorithms in terms of communication resource utilization and service satisfaction rate,which can effectively balance the network load and has good scalability.

关 键 词：低轨卫星网络 多径 二次规划问题 铱星星座 拥塞控制 

分 类 号：TN927[电子电信—通信与信息系统]