Design And Implementation Of Space-Ground Integrated Network Topology Visualization System

With the construction and development of Space-Ground integrated network,the structure of network becomes increasingly complex,and the security's issues in cyberspace are also increasingly prominent.In order to effectively manage and monitor the devices in the Space-Ground integrated network,and to improve the efficiency of the network administrator,the old mode of artificial network management need to be discarded.Therefore,topology visualization management needs to be adopted to manage the status of devices and relationships between routes.In that case,we could construct a network topology visualization system integrating devices management and intelligent alarm functions.The visualization research on Space-Ground integrated network mainly focuses on skynet and groundnet.At present stage,ground network topology visualization mostly adopt logical topology layout algorithms to layout device nodes.These algorithms not only have high computational complexity,but also ignore the actual location information of the device nodes in network topology,which weaken network administrator's cognition of network distribution.In addition,the researches on satellite network topology visualization in skynet usually analyze the network status based on the static satellite topological graph,without effectively highlighting the dynamic property of satellite network.Based on the above problems,we start from the characteristics of Space-Ground integrated network,not only improve the ground network topological visualization via combining the physical layout algorithm and the logical layout algorithm,but also improve satellite network topology visualization via combining satellite trajectory visualization algorithm and satellite logical topology layout algorithm.The main research work of this paper is as follows:In terms of the ground network topology visualization,we propose a mixture layout method of physical and logical for topological visualization.Via hierarchical division,we utilize a physical layout algorithm based on geographic information to layout ground backbone network and a logical layout algorithm based on parallel force guidance to layout ground subnet.Then,we design good interactions to optimize the logical layout effects.Under these improvement,the geographic location information of network device nodes is effectively utilized and the computational complexity of the logical layout algorithm is reduced.In terms of the satellite network topology visualization,we combine the spatial position of the satellites to design the satellite trajectory display module based on digital earth.We also take the advantage of the periodicity of satellite network,to realize satellite network topology visualization by utilizing a snapshot-based satellite network logical topology layout algorithm.On this basis,we propose a dynamic network topology re-layout algorithm to speed up the layout of the satellite network snapshot,and also reduce the layout differences between each adjacent snapshots.In that case,it could help maintain the cognitive continuity of managers.Based on the ground network and the satellite network topology layout algorithms,we design and implement the Space-Ground integrated network topology visualization system,which can effectively help network administrator monitor and manage devices' status and security risks in the Space-Ground integrated network.