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Sensors 2018, 18(5), 1535; https://doi.org/10.3390/s18051535

An Effective Delay Reduction Approach through a Portion of Nodes with a Larger Duty Cycle for Industrial WSNs

1
School of Information Science and Engineering, Central South University, Changsha 410083, China
2
College of computer and information engineering, Hunan University of Commerce, Changsha 410205, China
3
School of Software, Central South University, Changsha 410075, China
4
College of Computer, National University of Defense Technology, Changsha 410073, China
5
Department of Mathematics and Computer Science, Northeastern State University, Tahlequah, OK 74464, USA
6
The State Key Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou 310027, China
7
Department of Computer Science, Stony Brook University, Stony Brook, NY 11794, USA
*
Author to whom correspondence should be addressed.
Received: 31 March 2018 / Revised: 5 May 2018 / Accepted: 5 May 2018 / Published: 12 May 2018
(This article belongs to the Special Issue Sensor Networks and Systems to Enable Industry 4.0 Environments)

Abstract

For Industrial Wireless Sensor Networks (IWSNs), sending data with timely style to the stink (or control center, CC) that is monitored by sensor nodes is a challenging issue. However, in order to save energy, wireless sensor networks based on a duty cycle are widely used in the industrial field, which can bring great delay to data transmission. We observe that if the duty cycle of a small number of nodes in the network is set to 1, the sleep delay caused by the duty cycle can be effectively reduced. Thus, in this paper, a novel Portion of Nodes with Larger Duty Cycle (PNLDC) scheme is proposed to reduce delay and optimize energy efficiency for IWSNs. In the PNLDC scheme, a portion of nodes are selected to set their duty cycle to 1, and the proportion of nodes with the duty cycle of 1 is determined according to the energy abundance of the area in which the node is located. The more the residual energy in the region, the greater the proportion of the selected nodes. Because there are a certain proportion of nodes with the duty cycle of 1 in the network, the PNLDC scheme can effectively reduce delay in IWSNs. The performance analysis and experimental results show that the proposed scheme significantly reduces the delay for forwarding data by 8.9~26.4% and delay for detection by 2.1~24.6% without reducing the network lifetime when compared with the fixed duty cycle method. Meanwhile, compared with the dynamic duty cycle strategy, the proposed scheme has certain advantages in terms of energy utilization and delay reduction. View Full-Text
Keywords: industrial wireless sensor networks; duty cycle; sleep delay; energy efficient; lifetime industrial wireless sensor networks; duty cycle; sleep delay; energy efficient; lifetime
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Wu, M.; Wu, Y.; Liu, C.; Cai, Z.; Xiong, N.N.; Liu, A.; Ma, M. An Effective Delay Reduction Approach through a Portion of Nodes with a Larger Duty Cycle for Industrial WSNs. Sensors 2018, 18, 1535.

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