Collaborative data retrieval using opportunistic networking

In this paper we consider mobile nodes (pedestrian and vehicles) and fixed terminals in a urban area that are interested in collecting the information originated from several sources. In particular, each terminal aims at retrieving the data items in a limited region of interest centered around the node position. Furthermore, for mobile terminals the region of interest is a time varying concept due to the dynamic behavior of nodes. The goal of the paper is to evaluate the amount of information each node is able to gather resorting to simple distributed data collection and sharing through local broadcast communications among neighboring nodes.