Session mobility for collaborative pervasive apps using XMPP

In pervasive computing scenarios, user sessions often involve multiple devices like smartphones, tablets, large public displays and smart objects. In such settings, session mobility allows users to split sessions across several devices, to dynamically include or remove devices from sessions and to handover sessions from one device to another. While there are some good SIP-based solutions for session mobility in ubiquitous audio/video scenarios, there is yet no working approach for collaborative apps with event-like communication patterns. We describe and evaluate a solution for session mobility based on XMPP offering discovery of personal devices, discovery and authorization of public devices, and adhoc discovery of smart objects. All this can be done with little or no modification of existing XMPP technology, thus creating a standard-based toolset for session mobility. This eases development of collaborative apps and finally allows users to seamlessly continue their task in pervasive settings.