Research Of Cognitive Radio Network Security And CRN's Application

Nowadays,we could found communication technology everywhere.With the development and evolution of communication technology,spectrum resources are becoming more and more scarce.However,there is a large gap in the utilization rate of the allocated spectrum resources,and the utilization rate of some frequency bands is low,resulting in a waste of spectrum resources.In order to improve the utilization of spectrum resources,overcome the shortage of spectrum resources,scientists put forward the concept of cognitive radio(CR).Cognitive radio technology is a kind of software intelligent radio technology.This technology should be able to actively perceive the surrounding radio environment,and adjust its own transmitter according to the results of perception,so as to create a reliable communication environment.This paper starts with the concept of cognitive radio and its main technical characteristics,expounds its three key technologies,and discusses the network security of cognitive radio technology in detail,and studies the security architecture of Cr N system and the following security risks.In view of its main imitation main user attack(PUE attack),this article has carried on the detailed research to it.Imitating the main user attack is a serious network attack.Once it is established,it will have a serious impact on the CRN terminal,even the whole Cr N network.It causes the waste of bandwidth,the decline of service quality and so on.This will greatly occupy the available channel resources.In this case,the cognitive radio network can not find the available channel to transmit its own system information,which directly leads to the unavailability of the whole cognitive radio system.In order to avoid this situation,this paper builds a reliable model for it,studies the identification algorithm of malicious users,and carries out simulation experiments on this basis.This paper also discusses the application of cognitive radio technology in the current network and the scheme research,mainly including the application in LTE system,the application in NR(5g)system and the application in railway communication.