Journal
SENSORS
Volume 16, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/s16010104
Keywords
heterogeneous wireless sensor networks (HWSNs); k-coverage; connectivity; connected cover set
Funding
- National Natural Science Foundation of China [61373027]
- Natural Science Foundation of Shandong Province [ZR2012FM023]
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Coverage and connectivity are two important performance evaluation indices for wireless sensor networks (WSNs). In this paper, we focus on the connected target k-coverage (CTCk) problem in heterogeneous wireless sensor networks (HWSNs). A centralized connected target k-coverage algorithm (CCTCk) and a distributed connected target k-coverage algorithm (DCTCk) are proposed so as to generate connected cover sets for energy-efficient connectivity and coverage maintenance. To be specific, our proposed algorithms aim at achieving minimum connected target k-coverage, where each target in the monitored region is covered by at least k active sensor nodes. In addition, these two algorithms strive to minimize the total number of active sensor nodes and guarantee that each sensor node is connected to a sink, such that the sensed data can be forwarded to the sink. Our theoretical analysis and simulation results show that our proposed algorithms outperform a state-of-art connected k-coverage protocol for HWSNs.
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