By Jordi Nin, Daniel Villatoro
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.
Read or Download Citizen in Sensor Networks: First International Workshop, CitiSens 2012, Montpellier, France, August 27, 2012, Revised Selected Papers PDF
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Additional info for Citizen in Sensor Networks: First International Workshop, CitiSens 2012, Montpellier, France, August 27, 2012, Revised Selected Papers
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.
Citizen in Sensor Networks: First International Workshop, CitiSens 2012, Montpellier, France, August 27, 2012, Revised Selected Papers by Jordi Nin, Daniel Villatoro