Study On Survivability Index Of Field Communication Network

1. IntroductionIt is the rapid development of nuke, rocket, missile, and spaceflight weapon, the remarkable advance of the campaign ability in artillery, tank, aeronef and kinds of weapons, and the wide application of the modern technology in military makes firepower, onrush and maneuverability of the army greatly enhanced, execution and movement rate of the weapon is faster and faster, all these change the size and course of tradition war. Communication services should be seasoned with the size and course of the modern war. The demand for communication system is delicate, stabile, credible, auto and semi-auto. And it should be multimode and invulnerability real-time. So it ensures the communication be rapid, nice, secret, uninterrupted and so on. In this situation, field communication network comes into being. Through a long-time developing, it has been applied in the world. It would be the direction of military communication system in the future. In order to make the network satisfy strongpoints in the above, the survivability becomes especially important. Only in the case of having strong living ability it can be better accomplished. The information and military of campaign can reach one another efficiently, thereby the final victory of the militancy can be guaranteed.Survivability of field communication network is the communication ability among trunk line nodes when it is under strike. There are two types of strike in field communication networks: random strike and pertinence strike. The random strike is the trunk line nodes of field communication network are destroyed at some probability. The pertinence strike is the vertices are destroyed at some policy. As usual, the enemy's liberties strike to our network when they don't our condition and the network destroys itself all belong to random strike. But the aimed strike belongs to pertinence shrike when the enemies get our topological structure through any way. In this paper, the survivability of field communication network is divided into random strike and pertinence strike to be researched that makes it is more all-around and more idiographic.2. The survivability analysis of field communication network under random strikeSurvivability index of field communication network against the random condition is the ability to network connectivity, in which nodes operation in a random probability.2.1 The realization of rapid path enumeration methodCharacteristics by its simple and clear,path enumeration method has been a hot spot. Although the higher complexity of the algorithm, it gives all of the routing, which can facilitate identify fault with the aim. So it is necessary to improve the traditional path enumeration method. Search paths are calculated using the Breadth-First-Search principle, in order to minimize the complexity of algorithms, source nodes and the end nodes will not be considered in the path. Instead, considered the adjacent nodes of the source nodes and the end nodes as the beginning of the end nodes of Breadth-First-Search search reduce two search depths. Meanwhile, according to the hopping plane distance to give the most simple jump adjacent node sets, to avoid the emergence of the loop. On the basis of this method, a fast disjoint algorithm with matrix for survivability is proposed and use the matrix characteristics of the rapid computation to further reduce the complexity. In view of the high complexity of disjoint, Bayesian network will be introduced to adjoint process, combining with the minimal path, no need to the disjoint calculation of survivability index calculation. The calculation, analyze will be more and more flexible and intuitive. However, with regard to the larger network, which will substantially increase the complexity of the algorithm.2.2 Study on survivability index of accumulation pointsIn order to simplify the calculation complication of survivability index of accumulation points and make the survivability analyze is more practical, this paper provides the survivability analyze of accumulation points based on nodes of hopping plane. The survivability index of accumulation points consider the node's running probability, the characteristic of link bypass, and the case of multi-hop. The simulation indicates that the algorithm can accurately reflect the survivability when the field communication network is in the cases of multi-hop and link bypass and the characteristic of survivability is close to the clustering, it is suitable to the fact.3. The survivability analysis of field communication network under pertinency strikePertinency strike could be considered as the process of field communication network node of trunk line phase in striking, which is the process of being stroked by significance of nodes on trunk line. This paper according to the significance of nodes on trunk line, considering this process of striking, changing the destroy of the nodes to shrink of the nodes, listing the best case of survival to communication network node condition under pertinency strike.This method of vital node shrink appraise, incarnate principle combine with simplexes, processing, quantitative analysis and qualitative analysis. On confirming vital weights node, the old method mostly aimed at node significance of topological structure, it is not all-sided of node significance. this paper brings forward the method of Entropy-weights significance, making the 5 terms named running situation of network node, node switching ability, defending destroy ability, establishment charge and node communication ability, with the significance of topological structure, reflecting on the significance weights of node, integrating subjective and impersonality weights, making node significance more exact and more according with actual application.4. ConclusionThis paper first compartmentalizes the survivability of field communication network into random strike and pertinency strike, based on communication network survival evaluating research in home. To this difference, put forward two kinds of index of survivability algorithms which have lower operation complexity and set up universal model of field communication network to simulation. Computer simulation results indicate: evaluating method in random strike can exactly reflect survivability of field communication network, it is simple and easy to be realized. Important node constriction under pertinency strike fully considers the significance of node, and more accords to factual needs. The paper's production offer references to research on survivability of field communication network in the future, and give direction of designing field of high capability and survivability in communication network.