| 摘要: |
| 在当前低轨巨星座空间网络传输资源有限、传播时延长、传输业务类型繁多的背景下，针对星间路由算法对多样化业务服务质量保障的需求，采用基于分段路由技术的星间路由算法，分析分段路由技术在低轨巨星座空间网络的应用场景，包括分布式协同计算、分布式协同存储、分布式协同规划和分布式协同控制。采用应用需求字段，实现应用需求信息感知和满足应用服务质量的路由寻址，解决网络层与应用层割裂的痛点；采用段间路由和段内路由，达到复杂度优化的效果，解决卫星路由复杂度高的问题；采用段到段的确认重传机制，实现可靠性增强和为重要数据信息提供质量专线保障，解决故障处理代价高的问题。提出低轨巨星座的分段路由算法，其中用象限法筛选计算卫星段节点。最后，建立了星座模型，并进行路由仿真，结果表明分段路由算法在低轨巨星座场景下相比其他算法，在时延上降低了约14%、丢包率降低了约3%，吞吐量提升了约3%。 |
| 关键词: 低轨巨星座 分段路由技术 卫星路由算法 服务质量保障 可靠性增强 |
| DOI：10.20079/j.issn.1001-893x.240829008 |
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| 基金项目: |
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| Segmented Routing Technology Application for Space Network in Mega LEO Constellation |
| TU Jiahao,DANG Jiancheng,WU Kankan,LI Linwei,WANG Shaolin |
| (1.Shanghai Institute of Satellite Engineering，Shanghai 201109，China;2.Shanghai Academy of Spaceflight Technology，Shanghai 201109，China) |
| Abstract: |
| Under the background of limited transmission resources，long transmission time and many types of transmission services in the current low Earth orbit(LEO) space network，satellite routing algorithm based on segmented routing technology is adopted to analyze the application scenarios of segmented routing technology in the LEO space network in terms of the demand for quality of service(QoS) guarantee for diversified services，including distributed collaborative computation，distributed collaborative storage，distributed collaborative planning and distributed collaborative control.By adopting application demand fields，application demand information perception and satisfying application QoS routing are achieved，addressing the pain point of network layer and application layer split；by adopting inter-segment routing and intra-segment routing，complexity optimisation is achieved，addressing high complexity of satellite routing；by adopting segment-to-segment confirmation retransmission mechanism，reliability enhancement and quality dedicated line guarantee for important data information are achieved，addressing high fault handling cost.Segmented routing algorithm for mega LEO constellations is proposed，in which the quadrant method is used to screen and calculate satellite segmented nodes.Finally，the constellation model is established and routing simulation is carried out，and the results demonstrate that in LEO mega-constellation scenarios，the segmented routing algorithm reduces latency by approximately 14%，decreases packet loss rate by 3%，and improves throughput by 3%，compared with other algorithms. |
| Key words: mega LEO constellation segmented routing technology satellite routing algorithm quality of service guarantee reliability enhancement |
《电讯技术》编辑部 