Research On Dynamic Migration Strategy Of Virtual Machines In Mobile Edge Computing Environment

MEC(Mobile Edge Computing)is an architecture developed on the basis of 5G,which can better the integrate currently widely used mobile networks with Internet services.Compared with traditional cloud computing,MEC can sink the computing power of the cloud to the mobile edge node which is closer to the user,so as to provide users with a low-latency service and improve the efficiency of data processing,so it is widely used in mobile devices.In order to increase the utilization rate of mobile devices and reduce the transmission time delay,mobile devices can use the MEC environment to dynamically migrate virtual machines.However,MEC can easily cause some security problems while improving the transmission efficiency,and cannot guarantee the confidentiality and integrity of the migrated data.In addition,due to the limited computing power of mobile edge nodes,if the migration decision algorithm is too complex,it will cause a large time delay.Regarding the issue above,the main research work of this paper is as follows:1.In view of the confidentiality and integrity of data in the process of virtual machine migration in the edge computing environment cannot be guaranteed,and there may be security issues such as man-in-the-middle attacks,a migration scheme based on the TLS protocol is proposed.The solution uses edge nodes as the center,uses the TLS protocol for key exchange,establishes a session-secure communication channel,and uses dynamic migration to migrate virtual machines between edge devices in the channel.Security analysis shows that the scheme can meet the requirements of data confidentiality and integrity,and can resist man-in-the-middle attacks.Simulation experiments show that compared with the virtual machine security migration strategy in the cloud environment,the migration time of virtual machines is shortened.2.In view of the problem of long migration time and low availability of VM(virtual machine)migration in MD(mobile devices)in the mobile edge computing environment,this paper designs a MD2N(Mobile Device to Network)model.This model no longer uploads requests to the cloud center,but centers on the edge server,scheduling and selecting migration services through the communication between the servers.And a virtual machine migration strategy based on Markov decision and greedy algorithm is proposed.Model the edge server based on its geographic location,imitating the traditional cellular network method,and then the improved greedy algorithm is used to dynamically select the best edge device to migrate VM.Simulation and comparison experiments show that the proposed scheme has small migration fluctuations,stable migration status,short migration time,low average delay,and high service availability after migration.