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Sensors (Basel). 2016 Dec 12;16(12). pii: E2103.

A High-Efficiency Uneven Cluster Deployment Algorithm Based on Network Layered for Event Coverage in UWSNs.

Author information

1
College of Automation, Hangzhou Dianzi University, Hangzhou 310018, China. shanen_yu@hdu.edu.cn.
2
College of Automation, Hangzhou Dianzi University, Hangzhou 310018, China. liushuaihdu@163.com.
3
College of Automation, Hangzhou Dianzi University, Hangzhou 310018, China. pjiang@hdu.edu.cn.

Abstract

Most existing deployment algorithms for event coverage in underwater wireless sensor networks (UWSNs) usually do not consider that network communication has non-uniform characteristics on three-dimensional underwater environments. Such deployment algorithms ignore that the nodes are distributed at different depths and have different probabilities for data acquisition, thereby leading to imbalances in the overall network energy consumption, decreasing the network performance, and resulting in poor and unreliable late network operation. Therefore, in this study, we proposed an uneven cluster deployment algorithm based network layered for event coverage. First, according to the energy consumption requirement of the communication load at different depths of the underwater network, we obtained the expected value of deployment nodes and the distribution density of each layer network after theoretical analysis and deduction. Afterward, the network is divided into multilayers based on uneven clusters, and the heterogeneous communication radius of nodes can improve the network connectivity rate. The recovery strategy is used to balance the energy consumption of nodes in the cluster and can efficiently reconstruct the network topology, which ensures that the network has a high network coverage and connectivity rate in a long period of data acquisition. Simulation results show that the proposed algorithm improves network reliability and prolongs network lifetime by significantly reducing the blind movement of overall network nodes while maintaining a high network coverage and connectivity rate.

KEYWORDS:

event coverage; layered; recovery strategy; underwater wireless sensor networks (UWSNs); uneven cluster

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