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通过为工业 WSN 中具有较大占空比的部分节点来实现有效的延迟降低方法。

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

机构信息

School of Information Science and Engineering, Central South University, Changsha 410083, China.

College of computer and information engineering, Hunan University of Commerce, Changsha 410205, China.

出版信息

Sensors (Basel). 2018 May 12;18(5):1535. doi: 10.3390/s18051535.

DOI:10.3390/s18051535
PMID:29757236
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5982409/
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 8.926.4% and delay for detection by 2.124.6% 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.

摘要

对于工业无线传感器网络（IWSN），将具有及时性的数据发送到传感器节点监测的基站（或控制中心，CC）是一个具有挑战性的问题。然而，为了节省能源，基于占空比的无线传感器网络在工业领域得到了广泛的应用，这会给数据传输带来很大的延迟。我们观察到，如果网络中少数节点的占空比设置为 1，可以有效地减少占空比带来的睡眠延迟。因此，在本文中，提出了一种新的部分节点较大占空比（PNLDC）方案，以减少延迟并优化 IWSN 的能量效率。在 PNLDC 方案中，选择一部分节点将其占空比设置为 1，并且具有占空比为 1 的节点的比例根据节点所在区域的能量丰富度来确定。区域内剩余能量越多，选择的节点比例越大。由于网络中存在一定比例的占空比为 1 的节点，因此 PNLDC 方案可以有效地减少 IWSN 中的延迟。性能分析和实验结果表明，与固定占空比方法相比，该方案在不降低网络寿命的情况下，将转发数据的延迟降低了 8.9%至 26.4%，将检测延迟降低了 2.1%至 24.6%。同时，与动态占空比策略相比，该方案在能量利用和延迟减少方面具有一定的优势。

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