By Thomas Kesselheim (auth.), Amotz Bar-Noy, Magnús M. Halldórsson (eds.)
This booklet constitutes the completely refereed post-conference complaints of the eighth overseas Workshop on Algorithms for Sensor platforms, instant advert Hoc Networks, and independent cellular Entities, ALGOSENSORS 2012, held in Ljubljana, Slovenia, in September 2012. The eleven revised complete papers offered including invited keynote talks and short bulletins have been rigorously reviewed and chosen from 24 submissions. The papers are equipped in tracks: sensor networks - overlaying themes corresponding to barrier resilience, localization, connectivity with directional antennas, broadcast scheduling, and information aggregation; and advert hoc instant and cellular platforms - overlaying issues equivalent to: SINR version; geometric routing; cognitive radio networks; video supply; and mapping polygons.
Read or Download Algorithms for Sensor Systems: 8th International Symposium on Algorithms for Sensor Systems, Wireless Ad Hoc Networks and Autonomous Mobile Entities, ALGOSENSORS 2012, Ljubljana, Slovenia, September 13-14, 2012. Revised Selected Papers PDF
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Extra info for Algorithms for Sensor Systems: 8th International Symposium on Algorithms for Sensor Systems, Wireless Ad Hoc Networks and Autonomous Mobile Entities, ALGOSENSORS 2012, Ljubljana, Slovenia, September 13-14, 2012. Revised Selected Papers
Let A be an arrangement of n sensors constituting a barrier between two regions S and T . The resilience of A with respect to S and T , denoted ρ(A, S, T ), is deﬁned as the number of sensors in A that must be removed in order for there to be an S − T path that is not detected by any sensor. 5-approximation when S and T are moderately well-separated. We also deﬁne a generalization of ρ(A, S, T ) denoted ρc (A, S, T ), which is the resilience of the barrier if regions covered by more than c distinct sensors in the original arrangement are treated as inaccessible.
However, their construction does not ensure that the union of the wedges covers the entire plane. Actually, it is not always possible to orient a set of antennas with angle α < π/2, so that the induced graph is connected and the entire plane is covered. This is true even in the asymmetric model where one only requires strong connectivity, as observed by Bose et al. . , a set P of points on a vertical line segment s. , far enough to the right of s, at least one of the corresponding antennas must be oriented such that its wedge is empty of points of P (except for the point at its apex).
For example, for the capacity-maximization problem there are networks in which all n links can be scheduled with the right transmission powers. Restricting all transmissions to use uniform powers even the best solution is hardly better than the trivial one that only selects a single link. We strive to examine whether these results are particular to the respective worst-case networks or whether similar results can still be observed in randomly generated networks. We tackle these questions from two sides.
Algorithms for Sensor Systems: 8th International Symposium on Algorithms for Sensor Systems, Wireless Ad Hoc Networks and Autonomous Mobile Entities, ALGOSENSORS 2012, Ljubljana, Slovenia, September 13-14, 2012. Revised Selected Papers by Thomas Kesselheim (auth.), Amotz Bar-Noy, Magnús M. Halldórsson (eds.)