北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (7): 1467-1473.doi: 10.13700/j.bh.1001-5965.2018.0609

• 论文 • 上一篇    下一篇

一种低轨遥感卫星按需数据传输机制

毕梦格1, 徐伟琳2, 侯蓉晖3   

  1. 1. 西安电子科技大学 通信工程学院, 西安 710071;
    2. 中国空间技术研究院西安分院, 西安 710000;
    3. 西安电子科技大学 网络与信息安全学院, 西安 710071
  • 收稿日期:2018-10-23 出版日期:2019-07-20 发布日期:2019-07-25
  • 通讯作者: 侯蓉晖 E-mail:rhhou@xidian.edu.cn
  • 作者简介:毕梦格 女,硕士研究生。主要研究方向:卫星网络路由算法;徐伟琳 男,博士。主要研究方向:空间网络技术;侯蓉晖 女,博士,教授,博士生导师。主要研究方向:无线通信、卫星通信、空间网络技术。
  • 基金资助:
    国家自然科学基金(61571351,61472308,61572466,61771296);国家重点研发计划(2017YFB1400100);高等学校学科创新引智计划(B16037);中兴通讯研究基金;陕西省重点研发计划(中低轨卫星通信安全组网关键技术研究与平台开发)

An on-demand data transmission mechanism for LEO remote sensing satellite

BI Mengge1, XU Weilin2, HOU Ronghui3   

  1. 1. School of Telecommunications Engineering, Xidian University, Xi'an 710071, China;
    2. China Academy of Space Technology(Xi'an), Xi'an 710000, China;
    3. School of Cyber Engineering, Xidian University, Xi'an 710071, China
  • Received:2018-10-23 Online:2019-07-20 Published:2019-07-25
  • Supported by:
    National Natural Science Foundation of China (61571351,61472308,61572466,61771296); National Key R&D Program of China (2017 YFB1400100); 111 Project (B16037); ZTE Funding Program; Key R&D Program Project for Shaanxi Province (Research on the Key Technology and Platform Developing of MEO/LEO Satellite Communication Security)

摘要: 针对现有低轨(LEO)遥感卫星数据下行机制普遍存在的低效率、高时延、传输路径易损等问题,提出了一种新型的遥感数据传输机制。所提机制中,支持地面站按需实时定位遥感影像资源,并建立定位卫星到达地面站的传输路径;在建立传输路径时,考虑到协作卫星与地面的可视时间有限,提出了以路径持续服务时间最大化为度量的路由算法,降低因协作卫星改变而引入的传输时延。基于NS3仿真平台实现了所设计的数据传输机制,实验表明,提出机制相比现有数据传输机制可降低数据传输时延,减少数据丢失。

关键词: 低轨(LEO)卫星网络, 按需下行, 路由算法, 多路由度量, 持续服务时间

Abstract: Aimed at the shortcomings of the existing data downlink mechanisms for low earth orbit (LEO) remote sensing satellite, such as low effiency, high delay and vulnerable transmission path, a new remote sensing data transmission mechanism was proposed. In the proposed mechanism, earth stations were supported to locate remote sensing image resources in real time on demand, and in the process, the transmission path from the positioning satellite to earth station was established. Taking into account the limited visual time between the cooperative satellite and the earth station, when transmission path is established, a routing algorithm was proposed based on the maximization of the path persistent service time to reduce the transmission delay caused by the change of the cooperative satellite. The designed data transmission mechanism was implemented based on the NS3 simulation platform. The experimental results show that the proposed mechanism can reduce the data transmission delay and data loss compared with the existing data transmission mechanism.

Key words: low earth orbit (LEO) satellite network, on-demand downlink, routing algorithm, multi-route metric, persistent service time

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