| The capability of Information warfare is the primary battle effectiveness which can reflect military strength. As the primary carrier of Information warfare, Regional Communication Network(RCN) is gradually becoming the focus of the armies. This thesis mainly discusses the invulnerability on topological structure of RCN.In chapter 1, general conception of RCN and basic notions of invulnerability are introduced and the hiberarchy of invulnerability research is compartmentalized. The whole content is also presented in chapter 1.In chapter 2, basic knowledge of graph theory and communication correlation to invulnerability on topological structure of RCN is introduced.In chapter 3, the research actuality of the invulnerable metric on RCN's topological structure, the methods of promote invulnerability on RCN's topological structure and the methods of judge important nods on RCN are introduced.In chapter 4, a new invulnerable metric of the networks of main nodes is put forward based on the research actuality of the invulnerable metric on RCN's topological structure.Then, based on the analysis of RCN's topological structure, At the same time, a new invulnerable index on the users and the concept of information's amount is put forword. The methods of deploy backup main nodes is analyzed. Some measures is put forword to enhance the invulnerability of network's topological structure through an example of users' deployment impact on the invulnerability of RCN.In chapter 5, attack capability is classified to high intension and low intension based on connectivity. A new method based on the shortest route to estimate the importance of nodes is put forword under low intension attack capability while a simple and efficacious method to estimate the importance of nodes is also put forword under high intension attack capability.In the last chapter, a conclusion of the article is given. The unsolved problems as well as the future investigations are put forword.
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