| 摘要: |
| 针对小卫星通信链路交换频繁和低资源利用率的问题，提出了一种基于调度的小卫星路由优化策略。建立起小卫星星座模型，根据其运行方向(与赤道平面近似垂直)和所在维度确定链路的实时连接策略，优化其路由路径。面对持续增长的网络业务与有限的星上资源的矛盾，将业务数据包分类为实时性数据包和非实时性数据包，实行加权轮询调度保证其服务质量和资源的利用率。仿真结果证明，相比已有小卫星路由算法，优化的路由算法可以有效减小数据传输时延并增加系统吞吐量。 |
| 关键词: 小卫星星座 路由算法 数据包分类 加权轮询调度 |
| DOI：10.20079/j.issn.1001-893x.220515002 |
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| 基金项目:国家自然科学基金资助项目（62101339）；深圳市科技计划项目(JSGG20191129145212206)；鹏城实验室重大关键项目（PCL2021A15） |
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| Routing Optimization of Small Satellite with Scheduling |
| GAO Qiang,GUO Cheng,ZHANG Shengli,PU Weihua,WU Rongdong |
| ((1.College of Electronics and Information Engineering Shenzhen University,Shenzhen 518000,China;2.Pengcheng Laboratory,Shenzhen 518038,China;3.Shenzhen Aerospace Dongfanghong Satellite Co.,Ltd.,Shenzhen 518000,China)) |
| Abstract: |
| A scheduling-based optimization strategy for small satellite routing is proposed in order to solve the problems about frequent link switches and low resource utilization in the small satellite communication.A small satellite constellation model is established and then a satellite routing is optimized according to the moving direction(approximately perpendicular to the equatorial plane)and the real-time connection policy regarding the location dimension of satellites.Facing the contradiction between the ever increase of network services and the limited onboard resources,the service data packets are classified into real-time data packets and non-real-time data packets.A weighted round-robin scheduling is implemented to ensure its service quality and resource utilization.The simulation results show that,compared with the existing small satellite routing algorithms,the optimized routing algorithm can effectively reduce the data transmission delay and increase the system throughput. |
| Key words: small satellite constellation routing algorithm data packet classification weighted round-robin scheduling |
