Abstract
Aimed at the defects of current coverage-enhancing algorithms, firstly the probability model is introduced into the coverage-enhancing algorithm of the directional sensor network based on the virtual potential field, and the probability model would have an impact on the location of the centroid. Secondly, to the boundary coverage, through the simulation of typical algorithms which consider the boundary repulsion, it finds that the coverage rates of the corners are much lower than the overall coverage. To add a vertex force on the corner is essential and to some extent would reduce the gap between them. Finally, based on the random deployment of sensor nodes, a novel algorithm is proposed which determines whether the sensor node rotates or moves along fixed direction according to the coverage effect, named as PRMCA (probability model based rotate or move along fixed direction coverage-enhancing algorithm). A set of simulation experiments verify the performance of the proposed algorithm.
Highlights
At present, coverage, which is regarded as monitor of service quality, has been an essential problem of the wireless sensor networks (WSNs) [1]
In the traditional research of utilizing the virtual potential field to optimize the quality of WSNs, while calculating the virtual force, some algorithms calculate the composition of the force based on the Boolean model so that they ignore the unique attribute of the probability model
On the basis of the above, this paper proposes an algorithm based on coverage effect to determine the sensor to rotate or move along fixed direction which is named as probability model based rotate or move along fixed direction coverageenhancing algorithm PAMCA
Summary
Coverage, which is regarded as monitor of service quality, has been an essential problem of the wireless sensor networks (WSNs) [1]. The authors in [11] proposed a coverage preservation protocol based on the probability detection model (CPP) that makes working nodes in sensor networks as few as possible when network coverage is guaranteed. This protocol configures a network using centred control algorithm which limits the network scale, and at present most of the literatures. On the basis of the above, this paper proposes an algorithm based on coverage effect to determine the sensor to rotate or move along fixed direction which is named as probability model based rotate or move along fixed direction coverageenhancing algorithm PAMCA. This algorithm can be proved to make up some defects of current algorithms
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