## Abstract

One of the fundamental issues in sensor networks is the coverage problem, which reflects how well a sensor network is monitored or tracked by sensors. In this paper, we formulate this problem as a decision problem, whose goal is to determine whether every point in the service area of the sensor network is covered by at least k sensors, where k is a given parameter. The sensing ranges of sensors can be unit disks or non-unit disks. We present polynomial-time algorithms, in terms of the number of sensors, that can be easily translated to distributed protocols. The result is a generalization of some earlier results where only k = 1 is assumed. Applications of the result include determining insufficiently covered areas in a sensor network, enhancing fault-tolerant capability in hostile regions, and conserving energies of redundant sensors in a randomly deployed network. Our solutions can be easily translated to distributed protocols to solve the coverage problem.

Original language | English |
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Pages (from-to) | 519-528 |

Number of pages | 10 |

Journal | Mobile Networks and Applications |

Volume | 10 |

Issue number | 4 |

DOIs | |

State | Published - 4 Jul 2005 |

## Keywords

- Ad hoc network
- Computer geometry
- Coverage problem
- Sensor network
- Ubiquitous computing
- Wireless network