天地一体化网络基于拥塞状态的路径选择算法  

Routing Selection Algorithm Based on Congestion in Terrestrial-Satellite Integrated Networks

作　　者：鄢砚军 徐慧慧 叶升 YAN Yanjun;XU Huihui;YE Sheng(The No.91892^(nd) Troop of the PLA,Sanya 572099,China;Institute of Electronic and Information Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国人民解放军91892部队,海南三亚572099 [2]武汉大学电子信息学院,武汉430072

出　　处：《兵器装备工程学报》2021年第6期230-235,共6页Journal of Ordnance Equipment Engineering

摘　　要：针对地面5G网络受小型蜂窝小区的覆盖范围和回程容量的限制,提出将地面网络和卫星网络融合组成天地一体化网络。探索了天地一体化路由算法,将卫星网络无缝集成到地面网络中,根据地面段内以及地面和卫星段之间的流量需求调整路由。为了降低拥塞导致的队列时延和传播时延,提出一种基于星间链路的卫星路由算法,通过计算每个方向上链路的通信时延,找到最佳下一跳,通过模拟退火算法计算最优的天地一体化路由集合。并利用Satellite Tool Kit和QualNet进行仿真,仿真结果表明,天地一体化路由算法在吞吐量和时延方面均优于传统方法,为未来多网并存的异构网络研究提供了重要参考。Since 5G is limited by the coverage of small cells and backhaul capacity,satellites must be considered in the 5G infrastructure.We explored the routing algorithm in Terrestrial-Satellite Integrated Networks(TSINs),which seamlessly integrated the satellite network into the ground network.This algorithm can adjust its routing based on the traffic needs in the ground segment and between the ground-satellite segments.In order to reduce the queue delay caused by congestion,we first proposed a satellite routing algorithm based on ISL cost,by calculating the two-hop ISLs cost at each direction,and the routing decisions will be made to find optimal next hop.Then,the simulated annealing algorithm was used to derive the optimal path of TSINs.Based on Satellite Tool Kit and QualNet,simulation results show that the proposed routing mechanism offers good performance in terms of throughput and end-to-end delay.It provides a direction for the study of heterogeneous networks.

关 键 词：天地一体化网络 卫星 拥塞避免 路由算法 网络拓扑 

分 类 号：E96[军事—军事通信学]