Research on building large-scale sensor overlay networks with range queriable P2P

In this research, we propose to realize sensor overlay networks by connecting their gateways with Skip Graph (SG), which supports retrieving sensing resources using their properties. To integrate proximity awareness into SG, we present the hierarchy-aware extension of SG (HSG) by integrating the hierarchy of the physical Internet into overlay construction and routing to improve latency and traffic locality. To alleviate the effect of flash crowds, we present a virtual-node based method to make nodes help each other automatically. With extensive simulations, we show that our proposals are efficient with little overhead.