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Movable-multimedia: session mobility in ubiquitous computing ecosystem

IP-based Multimedia creation and consumption is becoming available on an increasing spectrum of devices ranging from low-powered portable devices like cell phones and PDA's to high powered static devices like desktops PCs and IPTVs. High-speed wireless and wire-line network access is becoming widespread. Multimedia services like IPTV, Video-on-demand and Video-conferencing are becoming main stream. These developments have paved the way for creating innovative concepts like session mobility for multimedia applications. Session mobility enables seamless transfer of an on-going multimedia session between different devices based on user preferences. We examine the motivations and use cases for session mobility. In this paper we evaluate architectural design constraints and propose architectural solutions for session mobility. We evaluate current session mobility mechanisms and propose requirements for new mechanisms.