A P2P-Framework for Context-Based Information

Recently context-based systems become more and more popular as sensor technology is improved and network access is almost omnipresent. Until now, establishing such systems involves larger investments in an appropriate infrastructure. In this paper we propose an architecture for a context-based system based on an overlay network using peer-to-peer technology. Furthermore, we modified the underlying Pastry algorithm to optimize for locality of data. Thus, we get a self-organizing network, which in addition stores context-data on nodes, which are geographically close.