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Modeling and topology design for free-space optical networks

机译：自由空间光网络建模与拓扑设计

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摘要

To date, free-space optical (FSO) networks play an important role in current network construction to support large-capacity transmission, where randomly distributed FSO terminals desire to exchange a tremendous amount of information over atmospheric turbulence channels. However, in the presence of atmospheric turbulence and misalignment fading channels, FSO network topology can be dynamic and disconnected. To mitigate the impact of dynamic network environments, appropriate higher-layer protocols should be designed. We explore a practical terrestrial mobile ad-hoc FSO network based on the bundle protocol of disruption-tolerant network, and the theoretical cross-layer system model between physical layer and network layer is derived. To design the topology, at the bundle layer, the distributed routing scheme centrality and probability (CAP) is proposed, where contact probability, sociocentric measure, and message replication strategy are considered simultaneously, and the joint forwarding decision rule is given. Simulation results on the opportunistic networking environment simulator are presented, which show that CAP can be better compared with the conventional end-to-end protocol-based routing scheme.
机译：迄今为止，自由空间光学（FSO）网络在当前网络建设中起重要作用，以支持大容量传输，其中随机分布的FSO终端希望在大气湍流通道上交换大量信息。然而，在大气湍流和未对准衰落通道的存在下，FSO网络拓扑可以是动态和断开的。为减轻动态网络环境的影响，应设计适当的更高层协议。我们根据中断宽容网络的束协议探索实用的地面移动ad-hoc FSO网络，派生物理层和网络层之间的理论跨层系统模型。为了设计拓扑，在束层处，提出了分布式路由方案中心和概率（盖子），其中同时考虑接触概率，社会度量和消息复制策略，并给出联合转发决策规则。展示了机会网络环境模拟器上的仿真结果，其示出了与传统的基于端到端协议的路由方案相比可以更好。

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  • 来源
    《Optical engineering》 |2019年第7期|076104.1-076104.7|共7页
  • 作者

    Yufei Luo; Zhan Gao; Te Chen; Luhai Fan; Anhong Dang;

  • 作者单位

    Peking University Department of Electronics State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing China;

    Peking University Department of Electronics State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing China;

    China Academy of Space Technology Institute of Telecommunication Satellite Beijing China;

    China Academy of Space Technology Institute of Telecommunication Satellite Beijing China;

    Peking University Department of Electronics State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    free-space optical networks; bundle protocol; atmospheric turbulence; pointing error;

    机译：自由空间光网络;捆绑协议;大气湍流;指向错误;

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