A threshold of ln n for approximating set cover
Journal of the ACM (JACM)
A Bidding Protocol for Deploying Mobile Sensors
ICNP '03 Proceedings of the 11th IEEE International Conference on Network Protocols
On k-coverage in a mostly sleeping sensor network
Proceedings of the 10th annual international conference on Mobile computing and networking
Mobile Wireless Sensor Network: Architecture and Enabling Technologies for Ubiquitous Computing
AINAW '07 Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02
Coverage in Hybrid Mobile Sensor Networks
IEEE Transactions on Mobile Computing
AINTEC '09 Asian Internet Engineering Conference
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There is a trend of conventional static WSNs towards hybrid static and mobile WSNs which can be seen in many recent protocols and designs. By enabling node mobility in conventional WSNs, the number of static sensors can be reduced effectively. Yet, what is still missing about a hybrid WSN is the optimal proportion of mobile and static sensors that can achieve the same network performance as a conventional WSN. In this paper, we propose an analytical model for hybrid WSNs, in particular, dealing with the area coverage issue while minimizing energy consumption. We first present the optimal proportion of mobile and static sensors in order to guarantee a full coverage with high probability under a uniform random node distribution. A mobility strategy is then developed which minimizes energy consumption due to node mobility. Finally, we evaluate the performance of the proposed model and mobility strategy using a discrete event network simulation framework based on OMNeT++. The simulation results validate the analytical solution.