Research And Implementation Of Joint Detection Of 4G Mobile Terminal Key Information

With the rapid development of wireless communication technology,mobile intelligent terminals have become indispensable personal belongings in people's daily life.The total number of mobile terminals in China has exceeded 1 billion.The popularity of mobile smart terminals has improved people's lifestyles.At the same time,it has also brought network security issues.Some criminals use the convenience of mobile terminals to carry out fraudulent activities on users.The different mobile terminals can be identified uniquely through the identity information IMSI,IMEI and MAC,all of which are unique.In order to solve the problem of network security,this thesis proposes a scheme of joint detection of key information of 4G mobile terminal.In the LTE network and the wireless WiFi network,the principle of the random access procedure of the UE,the periodic update of the tracking area and the WIFI wireless access is utilized.Through the air interface signaling interaction between the 4G mobile terminal and the 4G base station,and the signaling interaction between the mobile terminal and the access point to achieve real-time obtaining the 4G user identity information IMSI and IMEI and the mobile terminal MAC address,so as to achieve the purpose of joint detection of 4G mobile terminals,meanwhile reducing the missed detection rate of a single detection,4G mobile terminal can be easily monitored and managed.Through experimental testing,this thesis verifies the feasibility of this program design,with practical value,and applied to network security equipment.The innovation of this thesis is summarized as follows:(1)Propose the scheme of full release mode,which can obtain the 4G user's identity information in real time under the condition of no user's perception,and then release the user to drop it back to the public network 4G network.Meanwhile,the full attachment Mode solution,which continuously acquires the user's identity information without releasing the user and improve the success rate of capturing the UE.(2)Combined with two different schemes of full release and full attach mode,the optimization and improvement are made on this basis.A hybrid mode scheme is proposed to simplify the logic design process and improve the success rate of capturing the UE within the effective coverage of the base station.(3)Combined with the scheme of obtaining MAC address,a joint detection scheme is proposed.Through the joint detection of key identity information(IMSI,IMEI and MAC)of 4G mobile terminals,the success rate of 4G mobile terminal detection is improved,and the detection success rate can reach 93.3%.