Research On Robustness Analysis And Optimization Method Of Military Communication Network

No communication network,no army.No communication network,no military operation.When war breaks out,the communication network must be taken into account.The military communication network is a comprehensive system of information transmission that includes multiple types of communications equipment,has multiple functions and could complete multiple military tasks.The complex system can be analyzed from different perspectives as a collection of subnets containing different types showing interdependencies.The interdependence improves the transmission of information between networks,but it also exacerbates the vulnerability of military communication networks.When malicious attacks,spontaneous failures,and environmental factors simultaneously exist,the frequency of cascading failure effects across subnets increases,and military communication networks may fail on a large scale or even completely collapse.Therefore,it has valuable theoretical and practical significance to analyze the robustness influencing factors and the robustness optimization method of the military communication network with interdependence.Clarifying the basic concepts of military communication networks and constructing the basic model of load network robustness analysis,the thesis focuses on the three levels of topology,transmission load,information transmission and studies the robustness analysis model and optimization of a military communication network.The contents of the thesis are shown as follows:The first part is the analysis and optimization of the topology robustness of the military communication network.This thesis first abstracts the military communication network as an undirected and unweighted topological model.Then we focus on the factors such as the proportion of interdependence in the military communication sub-networks,the selection of interdependent nodes,and the interdependence between sub-networks.Finally,we propose an asymmetric military communication network topology.In order to solve the mathematical abstraction problem of military communication networks,this thesis uses an adjacency matrix to describe the topological structure of military communication networks.Based on the constructed topology model,this thesis analyzes the percolation process of a typical military communication network containing heterogeneous subnets.Experiments obtain the trend of robustness changes of military communication networks based on the interdependence between subnets when attacked.Based on this,the factors affecting the robustness of the military communication network topology are summarized.The robustness indicators that need to be optimized are extracted: the relative size of the gaint connected branch and the threshold of network collapse.In order to improve the measure of topology robustness effectively,the thesis proposes a robust optimization method based on random,degree or betweenness to increase connected edges.Experiments verify the optimization effect of the above optimization strategy on the robustness index.This thesis then proposes a robust optimization method based on information interference.The experiment proves the robustness improvement of the optimization in the face of different attack types.The comparison illustrates the advantages of the method compared with the edge-increasing strategy.The second part is the analysis and optimization of the transmission load robustness of the military communication network.This thesis constructs the load and capacity model of communication nodes and edges based on the established military communication network topology model.It converts it into an adjacency matrix for description.When the node or edge fails for the overload,the load will be redistributed among the nodes or edges according to a specific distribution strategy.Therefore,this thesis constructs a local load redistribution model and uses this model to analyze the cascading failure process of the military communication network transmission load.In addition,this thesis proposes the ratio of node cascading failure rate and network efficiency as the robustness index of the transmission load.On this basis,this thesis proposes an optimization method based on transmission load robustness by the recovery of public neighbour points.Experiments show that the method can effectively consider the correlation between the connected and unconnected branches and is less affected by the attack method.The third part is the analysis and optimization of the information transmission robustness of the military communication network.The ultimate goal of the military communication network is to realize the effective transmission of various operational information,which is also the purpose of analyzing and optimizing the robustness of the military communication network.Based on the first two parts,this thesis adds the research on the operation function information transmission between nodes.When abstracting various operation function information as directional edges in graph theory,this thesis reconstructs the basic model of military communication network,adjacency matrix model,load redistribution model,and cascading failure model that embody information transmission.This thesis proposes a robustness optimization method based on information transfer side reconstruction by taking the proportion of the most significant directional connected components as the primary measure of robustness.This approach focuses on the selection of redundant edges and appropriate reconstruction positions after the fracture.Experiments show that this method can effectively enhance the information transmission robustness of military communication network.