Abstract
The mixed wireless sensor networks that are composed of a mixture of mobile and static sensors are the tradeoff between cost and coverage. To provide the required high coverage, the mobile sensors have to move from dense areas to sparse areas. However, where to move and how to move are important issues for mobile sensors. This paper presents a centralized algorithm to assist the movement of mobile sensors. In this algorithm, the management node of the WSN collected the geographical information of all of the static and mobile sensors. Then, the management node executed the algorithm to get the best matches between mobile sensors and coverage holes. Simulation results show the effectiveness of our algorithm, in terms of saving energy and the load balance.
Highlights
Wireless sensor networks (WSNs) have been used extensively due to their excellent capability of monitoring real physical environments and collecting data
Before we tested the effectiveness of our algorithm, first, we proved that the mixed WSN was meaningful in real applications
We proposed a novel, centralized algorithm to deploy a mixture of mobile and static sensors to construct sensor networks to provide the required uniform sensing service in harsh environments
Summary
Wireless sensor networks (WSNs) have been used extensively due to their excellent capability of monitoring real physical environments and collecting data. Most of the networks consisted of a large number of static nodes, and there were many redundant nodes This approach often led to high cost and uncertainties concerning the coverage. Researchers have focused on mixed networks, which are composed of both static nodes and mobile nodes. We report the results of our design of a new, centralized algorithm for the placement of mobile sensors in a mixed network to achieve the goals mentioned in the problem statement. The implementation of the algorithm was divided into four stages, that is, (1) the management node of the WSN collected the geographical information of all of the static and mobile sensors; (2) the management node executed the algorithm to determine.
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