Ad-hoc, Mobile and Wireless Networks: 7th International by Andreas Wiese, Evangelos Kranakis (auth.), David Coudert, PDF

By Andreas Wiese, Evangelos Kranakis (auth.), David Coudert, David Simplot-Ryl, Ivan Stojmenovic (eds.)

This booklet constitutes the refereed lawsuits of the seventh foreign convention on Ad-Hoc, cellular, and instant Networks, ADHOC-NOW 2008, held in Sophia-Antipolis, France, September 2008.

The forty revised complete papers and the 15 poster displays have been rigorously reviewed and chosen from one hundred ten submissions. The papers take care of advances in Ad-Hoc networks, i.e. instant, self-organizing platforms shaped via co-operating nodes inside communique variety of one another that shape transitority networks. Their topology is dynamic, decentralized, ever altering and the nodes might movement round arbitrarily.

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Extra resources for Ad-hoc, Mobile and Wireless Networks: 7th International Conference, ADHOC-NOW 2008 Sophia-Antipolis, France, September 10-12, 2008 Proceedings

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This indicates that our proposed algorithm performs better than the other one. However, differences in the clock error model do not allow to exactly quantify the improvement. Contrary to the algorithm proposed in [8], the solution we propose does also not require any additional traffic in order to make the synchronization stable. On the Implementation on Low-Resource Devices. An implementation of the proposed algorithm on a sensor node requires the availability of enough memory to store the data for the computation of the smoothing filter and of the coefficients of the AR(1) model.

Moreover, the additional processing the SbV mechanism generates is well distributed among the nodes. In particular, this prevents greater energy drain rates on nodes nearby the inquiring node, thus promoting an indirect balance on energy consumption due to transmissions. Finally, the SbV mechanism behaves well in the mobile application scenarios we are interested in, which involves pedestrian (walking) mobility. During the development of this work, some aspects have been identified for future investigation.

The frequency offset is constant as long as a node does not change the state δi (t) = δibase + δistate , where δistate is specific for each state. It has to be noted that, from the point of view of the synchronization mechanism, this behavior is worse than the real case because it introduces a discontinuity in the −1 frequency offset ( λ−1 HL ∈ [500s, 1000s], λLH ∈ [1000s, 2000s], δiH ∈ [−40ppm, 0], δiH ∈ [0, 40ppm], δibase ∈ [−40ppm, 40ppm] are the parameters used for the simulation runs). Opportunistic Clock Synchronization 25 Fig.

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