融合功能特征和拓扑结构的卫星物联网关键节点分析OA

Aiming at the existing satellite network key node analysis methods which are mainly oriented to the static net-work and employ a monolithic evaluation index and overlook the node function for the network specificity,a satellite IoT key node analysis method integrating the functional characteristics and topology structure was proposed.Firstly,the dy-namic satellite network was divided into discrete time to get the topology snapshot sequence graph.Secondly,considering the geographic location and coverage time of subsatellite points,a spatio-temporal transaction traffic model was con-structed to obtain the IoT transaction traffic of satellites.Next,the functional importance index of satellite nodes based on the entropy of the weight traffic and the topological importance index of satellite nodes based on the degree and between-ness of the network nodes were defined,and it was further proposed to use the gray comprehensive evaluation to fuse the indexes of these two aspects to obtain a comprehensive key node analysis method.Finally,the simulation results show that compared with the existing methods,the proposed method can effectively improve the accuracy of key node identifi-cation in satellite networks,thus providing a technical means for the analysis of key nodes in dynamic satellite networks.