Research On Security Of Converged Access Network

With the arrival of the mobile Internet era,the demand of high bandwidth,low delay,and mobility,promoted the development of various access network technology,including the cable broadband access technology,wireless broadband access technology,mobile communication network access technology.However,due to the development of a variety of network technologies,the heterogeneity of access networks are becoming more and more serious.Because of the complexity of heterogeneous networks,users,operators,and service providers need a converged network infrastructure providing bandwidth,low latency and mobility.Thus,the converged network access technology has become an important issue in the research and development of network technology.At present,the most widely used network access technology has a heterogeneous network(HetNet),optical and wireless network(FiWi).HetNet is mobile converged access network,in particular to a long-term follow-up evolution in cellular networks(LTE-A)macro base station eNodeB and NodeB,constitute the micro base station(micro cell and pico cell and femto cell),as well as the micro base station to macro base station relay link network,macro and micro base station complementary fusion access for users to provide better high bandwidth,low latency,high coverage of the mobile communication network.FiWi is an optical fiber and wireless network,which provides high bandwidth and wireless access technology with WiFi or WiMax,and provides high bandwidth and mobile broadband access network.Network invulnerability,as one of the important indicators of network security,is the key point of this research.Invulnerability refers to the network's recovery and ability to complete key services after the failure of network node or link because of network attacks or other factors.This topic from web of science analysis,the converged network(FiWi,HetNet)abstracted into large complex networks,network robustness and efficiency of the network to use two indicators of changes to evaluate network encounter random node failure or intentional attacks against the network invulnerability.In addition,the research of network security is a hot spot in recent years.Moving target defence(MTD)is a hot research topic in recent years.The technology is to change the properties of the network and the system periodically or irregularly.This subject is based on the fusion network survivability based on the important degree of nodes and theoretical simulation moving target defense technology of network survivability optimization function is proposed in this paper.And to develop and implement the mobile target defense technology in the existing specific integrated network environment.In this paper,we study the current network architecture,which mainly introduces the heterogeneous network(HetNet),and analyzes the security threats and related research requirements of the mobile communication system(FiWi).With the aid of in network science to converged network abstraction for large-scale complex weighted networks,we select the network reliability and invulnerability as a research point of converged network security.We establish a complex network invulnerability evaluation model and analyze converged network invulnerability when encountering random node random failure and intentional attack.According to the demand of network security threat,we analyze that moving target defense optimizes converged network invulnerability.In addition we realized the mobile target defense technology based on the host system running,and based on the control point operation in the special converged network environment.