基于业务特征的空间光通信网络业务调度方法  

Traffic Scheduling in Space Optical Communication Network Based on Its Characteristics

作　　者：赵毅[1] 李文屏[2] 白鹤峰[2] ZHAO Yi;LI Wenping;BAI Hefeng(China Acdemy of Space Technology(Xi'an),Xi'an 710000,China;Beijing Institute of Tracking and Telecommunica tions Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000 [2]北京跟踪与通信技术研究所,北京100094

出　　处：《空间电子技术》2020年第3期58-64,共7页Space Electronic Technology

基　　金：国家自然科学基金资助项目(编号:61971440)。

摘　　要：针对空间光通信网络多用户组网和多类型业务传输的需求,提出了一种基于业务特征的光流交换(OFS)和光突发交换(OBS)相结合的空间光通信网络业务调度方法。OFS具有传输时延较大、光链路利用率较低、QoS保证能力强等特点,相比之下OBS以牺牲QoS保证能力为代价,提高了光链路利用率,降低了传输时延。经过对空间光通信网络拓扑结构和业务类型进行研究,以及对OBS交换体制和OFS交换体制进行数学建模仿真,结果表明,该方法能够根据通信业务类型和业务带宽等特征选择更适合的光交换体制,可充分利用两种交换体制的优点,提高空间光通信网络光链路利用率和通信业务统计复用程度,降低传输时延,增强QoS保证能力,可为空间光通信网络的交换体制设计提供参考。In order to meet the requirements of multi-user networking and multi-type service transmission in space optical communication network,a traffic scheduling method based on its characteristics is proposed to select the OFS(Optical Flow Switching)and OBS(Optical Burst Switching).OFS has long transmission delay,low statistical multiplex rate of optical link and high QoS guarantee ability,in contrast OBS has increased the statistical multiplex rate of optical link and shorten the transmission delay at the cost of the QoS assurance degradation.After the research on the topological structure and service type of the space optical communication network,and the mathematical modeling and simulation of OFS and OBS,it can be showed that this method can select a more suitable optical switching system according to the characteristics of communication service type and bandwidth.It can make full use of the advantages of the two switching systems to improve the utilization rate of optical link and the statistical multiplexing degree of communication network,reduce the transmission delay,and enhance the QoS guarantee ability.It can provide a reference for the design of switching system in the space optical communication network.

关 键 词：空间光通信网络 业务特征 业务调度 光流交换 光突发交换 

分 类 号：TN929.13[电子电信—通信与信息系统]