NDLI: Local data gathering using opportunistic networking in a urban scenario

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Local data gathering using opportunistic networking in a urban scenario

Content Provider	ACM Digital Library
Author	Gaeta, Rossano Sereno, Matteo Grangetto, Marco Corrente, Giuseppe
Abstract	Opportunistic networking based on hand-held mobile devices is turning into a viable and efficient opportunity to locate, collect, route and share information within a swarm of collaborative nodes. In this paper we consider mobile (pedestrian and cars) 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. Since data items may change over time all nodes must strive for having access to the latest version. 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 opportunistic communications among neighboring nodes. In particular, we analyze the impact of node density, different mix of cars and pedestrian, and amount of node memory. Moreover, we evaluate the improvement of using location aware memory management policies as well as the effect of adding a few ideal nodes whose mobility is described by an unconstrained Brownian motion. To this end we develop a simulator based on mobility and radio propagation traces obtained from the UDelModels tools. The preliminary findings highlight that simple location aware memory management schemes effectively exploit nodes with limited amount of memory. Furthermore, increasing randomness of nodes movement has a beneficial impact on the average performance of all node types.
Starting Page	57
Ending Page	64
Page Count	8
File Format	PDF
ISBN	9781450309004
DOI	10.1145/2069063.2069074
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-11-03
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Opportunistic networking Urban mobility Data gathering
Content Type	Text
Resource Type	Article

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