Mobility support of multi-user services in next generation wireless systems

The substantial advancement and proliferation of wireless technologies leads to the need to efficiently manage user mobility. Furthermore, the simultaneously emerging of services like video-conference, radio and TV has emphasized the importance to deliver content to several simultaneous receivers. This way, one of the key challenges to deploy multi-user services in the next generation wireless systems is the support of seamless mobility of multi-user services. In this paper the functioning of the Seamless Mobility of Users for Media Distribution Services (SEMUD) proposal is presented This mobility management technique possesses two operation modes. To provide seamless mobility the standard mode resorts on the collaboration between caches (located in the base stations) and buffers located in the mobile nodes). The enhanced mode introduces mobility prediction and messages for context transfer between access routers. A performance analysis is given to corroborate the merits of the proposal.