The design of topology-aware overlay networks for ubiquitous applications

In recent year, ubiquitous computing has gained more attention in academic area. With ubiquitous computing, users can process or get information anytime and anywhere. Fortunately, with the advent of peer-to-peer overlay network, the ubiquitous environment can become scalable with using the peer-to-peer overlay network as the communication middleware. Peer-to-Peer overlay network is an application model without considering underlying network topology. But there exists mis-match problem between peer-to-peer overlay network and physical network topology. This cause inefficient transmission or routing between peers in the peer-to-peer overlay network. On the other hand, the situation will have serious delay in real-time service, for example streaming service. Therefore, in this paper we propose an improvement mechanism based on physical network hop information to reduce the transmission cycles to adjust the arrangement of peer-to-peer overlay network dynamically.