| 摘要: |
| 随着低轨卫星网络所承载的业务量持续提升，现有的路由策略已经逐渐无法满足高负载情况下的网络性能要求。针对这个问题，提出了一种基于区域流量负载分流的低轨卫星路由算法（Regional-Traffic-Load-detour Load Balancing Routing，RTLBR），从而提升网络在高负载情况下的性能。首先，通过引入区域流量负载的概念，在路径预计算中依据区域整体负载情况控制数据转移概率实现逐跳分流。其次，在实际传输过程中采用交通灯策略评估具体链路的实时负载情况，并根据灯色调整分流比例，进一步提升算法应对突发性拥塞的能力。通过系统工具包（Systems Tool Kit，STK）实现场景建模仿真后发现，相比传统算法，RTLBR在网络流量为94 Tb/天的高负载情况下，不仅将丢包率和平均端到端时延缩小到了9.1%和117.2 ms，同时还将流量分布指数提升至了0.863，获得了更好的负载均衡效果，为低轨卫星网络高负载情况下的拥塞回避提供了技术支撑。 |
| 关键词: 低轨卫星网络 负载均衡 路由算法 区域流量负载 |
| DOI：10.20079/j.issn.1001-893x.240228006 |
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| 基金项目:国家自然科学基金资助项目（62301282）;重点国际合作项目（61720106003） |
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| Regional Traffic Load Detour Load Balancing Routing Algorithm for Low Earth Orbit Satellites |
| ZHANG Hanyue,JIANG Chengyang,KONG Huaicong,LIN Zhi,HAN Lue |
| (1.Portland Institute,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;2.College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;3.Institute of Electronic Countermeasure，National University of Defense Technology，Hefei 230007,China) |
| Abstract: |
| As low Earth orbit(LEO) satellite networks continue to carry an increasing volume of traffic,existing routing strategies are gradually unable to meet the network performance requirements under high load conditions.To address this issue,a regional-traffic-load-detour load balancing routing(RTLBR) algorithm for LEO satellite networks is proposed to enhance network performance in high load situations.Firstly,by introducing the concept of regional traffic load,the algorithm controls the data transfer probability on a hop-by-hop basis during path pre-computation according to the overall load situation of the region.Secondly,in the actual transmission process,a traffic light strategy is employed to assess the real-time load situation of specific links,and the detour proportion is adjusted according to the traffic light color,further enhancing the algorithm搒 ability to respond to sudden congestion.Finally,through scenario modeling and simulation with Systems Tool Kit(STK),it is found that compared with traditional algorithms,RTLBR not only reduces the packet loss rate and average end-to-end delay to 9.1% and 117.2 ms respectively under high load conditions of 94 Tb/day network traffic,but also improves the traffic distribution index to 0.863.Better load balancing is aehieved,providing technical support for congestion avoidance in low Earth orbit satellite networks under high load conditions. |
| Key words: low Earth orbit satellite network load balancing routing algorithm regional traffic load |
《电讯技术》编辑部 