基于邻居卫星负载状态的低轨卫星分布式路由算法  

Neighbor satellite load based low orbit satellite distributed routing algorithm

作　　者：杨明川[1] 薛冠昌 李清毅[2] YANG Mingchuan;XUE Guanchang;LI Qingyi(College of Information and Communication Engineering,Harbin Institute of Technology,Harbin 150001,China;Beijing Institute of Spacecraft Systems Engineering,Beijing 100086,China)

机构地区：[1]哈尔滨工业大学信息与通信工程学院,黑龙江哈尔滨150001 [2]北京空间飞行器总体设计部,北京100086

出　　处：《通信学报》2021年第8期43-51,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(No.62071146)。

摘　　要：卫星灵活性和机动性强、不易受地面因素的影响,使空间卫星技术不断飞速发展。卫星网络随着负载的增加始终存在负载拥塞现象,使路由算法成为卫星网络研究领域的核心问题。基于卫星网络的拥塞缓解、网络的信令开销以及算法运算复杂度问题,深入研究低轨卫星网络局部负载均衡的分布式路由算法。构建基于铱星系统的网络模型,提出一种基于邻居卫星负载状态的分布式路由算法(DRNL)。DRNL包含邻居卫星负载状态更新、负载均衡和路由判决等机制,具有一定的可移植性,能够适应其他极轨或近极轨星座。OPNET仿真结果表明,DRNL在较重的网络负载情况下能较好地适应负载的变化,缓解卫星拥塞的状况并获得较低的时延和数据分组丢失率。Satellites are highly flexible and maneuverable,and they are not easily affected by ground factors,which has led to the rapid development of space satellite technology.Satellite networks always have load congestion problem as the load increases,making routing algorithms a core issue in the field of satellite network research.Based on the problems of congestion mitigation,signaling overhead,and algorithm complexity,the distributed routing algorithm for local load ba-lancing of LEO(low earth orbit)satellite networks was deeply studied.The network model was constructed based on the Iridium satellite system and a distributed routing algorithm based on the load status of neighbor satellite(DRNL)was proposed,which included such as load status update of neighbor nodes,load balancing and routing decision.It had a cer-tain degree of portability and could adapt to other polar or near polar orbit constellation.The simulation results based on the OPNET show that the DRNL can better adapt to the heavier network loads state,alleviate satellite congestion,obtain lower delay and packet loss.

关 键 词：负载均衡 低地球轨道 分布式路由 DRNL算法 

分 类 号：TN927[电子电信—通信与信息系统]