A migrating optimization method for CDN based on distributed mobility management

This paper proposes a data flow migrating optimization scheme for CDN system in wireless network. NAT device is introduced as proxy to help CDN mirror supporting mobility functions which are not supported originally. And a virtual IP scheme is also designed to decouple the position and content so that the session can be migrated over different mirrors and user can obtain the data from the nearest one. Thus the user can not only get benefit from routing optimization but also obtain the nearest mirror transmission always. The result of NS-2 Simulation shows that proposed scheme can reduce the latency of packet delivery obviously, compared to the existing optimization schemes.