Session Mobility Between Heterogenous Accesses with the Exictence of IMS as the Service Control Overlay

Session mobility is an advanced feature that provides new capabilities for the clients as well as more benefits for the service operators. In this paper we propose the deployment of a mobility server in IMS-IP multimedia subsystem to provide session mobility between the devices connected to different access technologies. We have modified SIP based session mobility approaches and we have adopted them in IMS. Moreover, advanced features of session mobility like session splitting and combined device discovery and session mobility is sought in this paper