基于接入流量分布的空间信息网络激光链路分配方法研究  

Incoming traffic distribution based laser link assignment scheme for space information networks

作　　者：王俊英 严志博 李文峰[1] 赵康僆[1] 蔺祥宇 Wang Junying;Yan Zhibo;Li Wenfeng;Zhao Kanglian;Lin Xiangyu(School of Electronic Sciences and Engineering,Nanjing University,Nanjing,210023,China;Beijing Institute of Spacecraft System Engineering,Beijing,100094,China)

机构地区：[1]南京大学电子科学与工程学院,南京210023 [2]北京空间飞行器总体设计部,北京100094

出　　处：《南京大学学报（自然科学版）》2020年第6期877-884,共8页Journal of Nanjing University（Natural Science）

基　　金：民用航天十三五预先研究2018年第二批重点项目(B0110);中央高校基本科研业务费。

摘　　要：考虑我国卫星地面设站约束和地面接入流量分布对数据交付时间的影响,以空间数据回传为切入点,针对地面接入流量分布不均导致部分区域链路拥塞的问题,以最小化数据交付时间为目标,研究空间信息网络激光星间链路分配方案的设计,提出一种基于接入流量分布的空间信息网络链路分配方案.该方案借鉴有限状态自动机(Finite State Automaton,FSA)思想,将卫星间动态可见关系转化为若干连续的静态可见关系,利用卫星覆盖区域信息,分状态建立卫星对接入流量的转发量模型,并在此基础上建立了星间激光链路分配模型,通过多目标模拟退火算法求解得到全局最优的分配结果.仿真结果表明,经过该算法优化的链路分配方案能够针对接入流量分布有效提升加权时延性能,实现了对链路分配方案设计的优化.Considering the geographic constraint on the locations of Chinese ground stations and the impact of the distribution of the incoming network traffic on the data delivery time,the scheduling of the intersatellite free space optical links is studied to achieve the minimum delivery time for data backhauling aiming at solving the link congestion caused by uneven distribution of the incoming network traffic.By employing the concept of finite state automaton(FSA),the dynamic visibility among satellites is firstly transformed into several continuous static contacts.With the information of satellite coverage,the model of satellite transfer volume of the incoming traffic is formulated for different FSA states.On this basis,the model of link assignment is established.The multi-objective simulated annealing algorithm is exploited to obtain the global optimal.The simulation results show that the link assignment scheme optimized by this algorithm can effectively improve the weighted-delay performance.

关 键 词：空间信息网络 星间激光链路 接入流量分布 链路分配 

分 类 号：V474.25[航空宇航科学与技术—飞行器设计]