基于时空冲突图的卫星光网络波长资源特性研究  

Research on Wavelength Resource Characteristics of Optical Satellite Network Based on Time-Space Conflict Map

作　　者：李信 李勇军[1] 赵尚弘[1] 王翔[1] 马志强[1] 侯睿 Li Xin;Li Yongjun;Zhao Shanghong;Wang Xiang;Ma Zhiqiang;Hou Rui(Teaching and Research Section of Communication System,College of Information and Navigation,Air Force Engineering University,Xi’an 710077,Shaanxi,China;A Centre of the Ministry of Equipment Development,Beijing 100034,China)

机构地区：[1]空军工程大学信息与导航学院通信系统教研室,陕西西安710077 [2]装备发展部某中心,北京100034

出　　处：《激光与光电子学进展》2023年第9期164-172,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(91638101,6170010130)。

摘　　要：针对动态卫星光网络中的波长资源紧缺问题,研究了其波长数与网络物理连通度的关系,提出了一种基于时空冲突图的波长资源特性分析方法。利用随机生成网络拓扑连接的方式,将卫星光网络的动态拓扑离散为空间和时间冲突图,分别表示网络的物理连通度和有效窗口。基于时空冲突图理论,建立空间冲突避免的路径选择概率和时间存储的有效窗口业务概率,两者相乘得到时空冲突概率,进而计算网络所需波长数。研究结果表明,波长需求与网络物理连通度、链路最大跳数和转发器数目有着密切关系,在业务重叠因子较大的情况下应该给卫星光网络分配更多的波长资源。The relationship between wavelength demand and network physical connectivity is studied to solve the wavelength resource shortage problems in dynamic optical satellite network,and a method based on a timespace conflict map is proposed to analyze the characteristics of wavelength resources.The method for randomly generating network topology connections is utilized to discretize the dynamic topology of an optical satellite network into a space conflict map and a time conflict map,which express the physical connectivity and effective service window of the optical satellite network,respectively.Based on the timespace conflict map theory,the path selection probability of space conflict avoidance and the effective window service probability of time storage are established and multiplied to obtain the conflict probability in timespace and calculate the number of wavelengths required in the network.The results show that wavelength requirements are closely related to the network physical connectivity,maximum number of link hops,and number of transponders.More wavelength resources should be allocated to an optical satellite network with a larger business overlap factor.

关 键 词：光纤光学与光通信 卫星光网络 波长资源 时空冲突图 物理连通度 网络连通度 

分 类 号：O436[机械工程—光学工程]