Event-based Middleware for Pervasive Computing

Revision with unchanged content. Mobile applications running on personal devices, like smartphones, PDAs, or laptop computers, create a fascinating market for many new mobile services. Mobile commerce, location-based services, multimedia messaging, or mobile ga­ming are expected to constitute a main driving-force for technological ad­vance­ments, creating a new source of revenue for infrastructure providers and developers. Based on what we observe today, the logical next steps lead to integrated infrastructures and applications supporting "pervasive com­pu­ting". What­ever this future will look like, the basic cornerstones will be: (i) highly no­madic users, (ii) personalized devices running smart applications, (iii) per­va­sive smart infrastructures, and (iv) efficient communication for end-to-end in­tegration of all building blocks. This book introduces the amazing world of pervasive computing, leads step-by-step through the new design challenges for pervasive computing appli­ca­tions and identifies the key challenges for engineering middleware supporting per­vasive applications. Based on the well-known publish/subscribe paradigm it demonstrates how middleware systems can be designed to explicitly make use of "context" of users and applications. It then shows how context in­for­ma­tion can be leveraged for optimizing the efficiency of communication in­side a notification service.