An adaptive retransmit mechanism for delay differentiated services in industrial WSNs
An adaptive retransmit mechanism for delay differentiated services in industrial WSNs
复制标题
工业无线传感器网络中延迟差异化服务的自适应重传机制
DOI：
10.1186/s13638-019-1566-2
复制
发表时间：
2019-11
影响因子：
2.6
通讯作者：
Song Houbing
中科院分区：
文献类型：
--
作者：
Chen Ye;Liu Wei;Wang Tian;Deng Qingyong;Liu Anfeng;Song Houbing
物联网（IoT）是最新的互联网发展，拥有数十亿互联网连接的设备和广泛的工业应用。无线传感器网络是物联网的重要组成部分。传感器节点由于其大规模、自组织、动态等特点，受到了研究者的广泛关注，在工业、交通信息、军事、环境监测等方面得到了广泛的应用。随着微处理器技术的发展，传感器节点的功能越来越强大，这使得相同的无线传感器网络（WSNs）平台能够满足许多应用的不同服务质量（QoS）要求。工业无线传感器网络的应用范围从较低的物理层到较高的应用层。同一个无线传感器网络有时需要处理来自不同层的信息。传统协议缺乏区分服务，不能充分利用网络资源。本文提出了一种自适应延迟区分服务重传机制（ARM-DDS），以满足不同级别的延迟应用。首先，我们分析了不同的调度机制和参数优化对时延和能耗的影响。根据分析结果，在ARM-DDS方案中，对于具有传输时延容忍度的路由，采用节能重传机制，对于时延敏感的路由，采用低时延重传机制。这样，不同应用的数据路由延迟被保证在范围内，并且减少了网络的能量消耗。此外，ARM-DDS方案充分利用了网络的剩余能量，并在远端汇聚区采用了小时延路由选择机制来降低端到端时延。理论分析和仿真实验均表明，在相同可靠性要求的前提下，ARM-DDS方案使数据传输时延降低了12.1%，网络能量利用率提高了28%。考虑到数据流的可靠性要求不同，该方案还可以延长网络的生命周期。
The Internet of Things (IoT) is the latest Internet development, with billions of Internet-connected devices and a wide range of industrial applications. Wireless sensor networks are an important part of the Internet of Things. It has received extensive attention from researchers due to its large-scale, self-organizing, and dynamic characteristics and has been widely used in industry, traffic information, military, environmental monitoring, and so on. With the development of microprocessor technology, sensor nodes are becoming more and more powerful, which enables the same wireless sensor networks (WSNs) platform to meet the different quality of service (QoS) requirements of many applications. Applications for industrial wireless sensor networks range from lower physical layers to higher application layers. The same wireless sensor network sometimes needs to process information from different layers. Traditional protocols lack differentiated services and cannot make full use of network resources. In this paper, an Adaptive Retransmit Mechanism for Delay Differentiated Services (ARM-DDS) scheme is proposed to meet different levels of delays of applications. Firstly, we analyze the impact of different retransmit mechanisms and parameter optimization on delays and energy consumption. Based on the results of the analysis, in ARM-DDS scheme, for routes with transmission delay tolerance, energy-saving retransmission mechanisms are used, and low-latency retransmission mechanisms are used for latency-sensitive routes. In this way, the data routing delays of different applications are guaranteed within bound and the energy consumption of the network is reduced. What is more, ARM-DDS scheme makes full use of the residual energy of the network and uses a small delay routing retransmit mechanism in the far-sink area to reduce end-to-end delay. Both theoretical analysis and simulation experiments show that under the premise of the same reliability requirements, ARM-DDS scheme reduces data transmission delay 12.1% and improves network energy utilization 28%. Given that the reliability requirements of the data stream are different, the scheme can also extend the network lifetime.
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DOI：
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