Institute of Electrical & Electronic Engineers
In many potential wireless sensor network applications, the cost of the base station infrastructure can be prohibitive. Instead, the authors consider the use of mobile devices carried by people in their daily life to collect sensor reports opportunistically. Considering that human mobility demonstrates strong spatial locality and sensor nodes need to be deeply duty-cycled for longevity, Data Pre-Forwarding (DPF), in which sensor reports are forwarded to sensor nodes visited by people more frequently even though they are not currently being visited, should be a promising scheme to improve the performance of opportunistic data collection. In this paper, a distributed DPF mechanism is proposed to exploit the spatial locality of human mobility in the context of opportunistic data collection.