卫星异质信息网络中节点重要度衡量方法  

Node Importance Measurement Method in Heterogeneous Information Satellite Network

作　　者：李静玲[1] 黎军[1] 梁薇[1] 崔涛[1] 张怡[1] Li Jingling;Li Jun;Liang Wei;Cui Tao;Zhang Yi(National Key Laboratory of Science and Technology on Space Microwave,CAST,Xi'an 710100,China)

机构地区：[1]中国空间技术研究院西安分院空间微波技术重点实验室,陕西西安710100

出　　处：《天地一体化信息网络》2022年第2期56-62,共7页Space-Integrated-Ground Information Networks

基　　金：国家重点实验室稳定支持基金(No.HTKJ2021KL504006)。

摘　　要：卫星网络中不同节点对于网络连通性及吞吐量的影响不同,为了避免卫星网络关键节点失效导致的网络通信失常现象,可通过衡量卫星网络节点重要度提前进行网络规划。针对卫星网络信息异质的特点,定义卫星虚拟节点及虚拟子层,并提出卫星多层异质信息关联网络模型,定义虚拟节点的归一化度数、归一化节点介数及虚拟节点关联因子,并通过所定义参数提出网络节点重要度计算函数,可精准衡量卫星多层异质信息网络中的节点重要度。基于典型实例对网络连通度及吞吐量指标进行分析,结果表明本文所提算法与经典图论算法相比,能够综合考虑数据信息对于网络节点重要度的影响,更精准描述卫星多层异质信息网络的连通度指标。In satellite network,different nodes have different effects on network connectivity and throughput.In order to avoid network communication disturbances caused by the failure of key nodes in the satellite network,network planning can be carried out in advance by measuring the importance of satellite network nodes.According to the characteristics of satellite network information heterogeneity,satellite virtual nodes and virtual sub-layers were defined,and the satellite multi-layer heterogeneous information correlation network model was proposed.The normalized degree,normalized node betweenness and virtual node correlation factor of virtual nodes were defined,and the network node importance calculation function was proposed through the defined parameters,which could accurately measured the node importance in the satellite multi-layer heterogeneous information network.Based on typical examples,the network connectivity and throughput indicators were analyzed.The results showed that the proposed algorithm was better than the classical graph theory algorithm,which could comprehensiv ely considered the impact of data information on the importance of network nodes,and more accurately described the connectivity index of satellite multi-layer heterogeneous information networks.

关 键 词：卫星网络 异质信息 节点重要度 网络连通度 

分 类 号：TP927.2[自动化与计算机技术]