A dynamic session switching method between digital network appliances

This paper presents a novel method, which dynamically switches sessions established by Universal Plug and Play (UPnP) and Session Initiation Protocol (SIP) to maintain the content delivery between digital network appliances when a user moves to/from home. UPnP is used when both appliances are in the home and SIP is used when at least one of them is outside. The proposed method targets session switching at a rate fast enough to ensure users may not be aware of it. This paper shows the performance of a prototype system based on the proposed method and its effectiveness.