Download PDF by Jordi Nin, Daniel Villatoro: Citizen in Sensor Networks: First International Workshop,

By Jordi Nin, Daniel Villatoro

ISBN-10: 3642360734

ISBN-13: 9783642360732

ISBN-10: 3642360742

ISBN-13: 9783642360749

This booklet constitutes the completely refereed post-conference complaints of the 1st foreign Workshop on Citizen Sensor Networks, CitiSens 2012, in Montpellier, France, on August 27, 2012.
The 7 revised complete papers awarded including 1 keynote lectures have been rigorously reviewed and chosen from sixteen submissions. The accredited papers take care of themes like crowdsourcing, shrewdpermanent towns, multi-agent platforms, privateness in social networks, info anonymity or clever sensors.

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Additional info for Citizen in Sensor Networks: First International Workshop, CitiSens 2012, Montpellier, France, August 27, 2012, Revised Selected Papers

Sample text

In contrast to previous approaches that tried to save energy using adaptive sampling schemes, COSA innovates by reaching this objective via a peer to peer negotiation protocol. This negotiation protocol enables nodes to interact and generate groups that produce a network-wide benefit. To attain a good group configuration the algorithm relies on the node local information about its environment state and neighbouring nodes. This local information together with the appropriate COSA algorithm parameter configuration leads to the formation of groups of nodes that act as a single entity, avoiding redundant sensing and transmissions efforts.

In our setting, this agent has the ability to obtain the actual contamination values at any time at every point in the river, and can therefore determine the differences between node-reported values and the real ones. Differently from sensing nodes, the sink node does not take samples from the environment, neither is it constrained to low power or low processing capacity, as it acts as a server in the system, being part of the network control unit. As previously explained, the system basic functioning consists of monitoring the environment through periodical samples collection.

The reference base for these two gauges are supplied by the random nodes’ behaviour, as they follow a dummy sampling policy. All the experiments have been run until every node in the network has completely depleted its battery, that is, for our experimental setting, 140 weeks. Figure 2 shows the ratio of network remaining energy for both kind of nodes, cf nodes and random nodes. In this figure, as initially expected, we can observe how the COSA algorithm allows the network to keep a higher level of global energy than the random policy during most of its life time; however, both sampling policies lead to a very similar network death time.

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Citizen in Sensor Networks: First International Workshop, CitiSens 2012, Montpellier, France, August 27, 2012, Revised Selected Papers by Jordi Nin, Daniel Villatoro

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