Communication for control-centric industrial applications is characterized by the requirements of very high reliability, very low and deterministic latency and high scalability. Typically, IEEE 802.11-based wireless local area networks (WLANs), also known as Wi-Fi networks, are deemed ineligible for industrial control applications owing to insufficient reliability and non-deterministic latency. This paper proposes a novel solution for providing reliable and deterministic communication, through Wi-Fi, in industrial environments. The proposed solution, termed as $\mathsf{HAR}^{\mathsf{2}}\mathsf{D-Fi}$ ( H ybrid channel A ccess with R edundancy for R eliable and D eterministic Wi- Fi ), adopts hybrid channel access mechanisms for achieving deterministic communication. It also provides temporal redundancy for enhanced reliability. $\mathsf{HAR}^{\mathsf{2}}\mathsf{D-Fi}$ implements different medium access control (MAC) designs that build on the standard physical (PHY) layer. Such designs can be classified into two categories: (a) MAC designs with pre-defined (physical) time-slotted schedule, and (b) MAC designs with virtual time-slotted schedule. Performance evaluation, based on analysis and system-level simulations, demonstrates the viability of $\mathsf{HAR}^{\mathsf{2}}\mathsf{D-Fi}$ for control-centric industrial applications.

中文翻译：

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高性能工业无线：通过IEEE 802.11 WLAN实现可靠的确定性连接

以控制为中心的工业应用的通信的特点是具有很高的可靠性，非常低的确定性延迟和很高的可伸缩性。通常，由于可靠性不足和不确定的延迟，基于IEEE 802.11的无线局域网（WLAN）也称为Wi-Fi网络，不适合工业控制应用。本文提出了一种新颖的解决方案，用于在工业环境中通过Wi-Fi提供可靠的确定性通信。提议的解决方案，称为$ \ mathsf {HAR} ^ {\ mathsf {2}} \ mathsf {D-Fi} $ （ H 混合频道 一种 与 [R 的充裕 [R 宜人的 d 权威Wi- Fi ），采用混合信道访问机制来实现确定性的通信。它还提供了时间冗余以增强可靠性。$ \ mathsf {HAR} ^ {\ mathsf {2}} \ mathsf {D-Fi} $实现基于标准物理（PHY）层的不同媒体访问控制（MAC）设计。这样的设计可以分为两类：（a）具有预定义（物理）时隙调度的MAC设计，以及（b）具有虚拟时隙调度的MAC设计。基于分析和系统级仿真的性能评估证明了$ \ mathsf {HAR} ^ {\ mathsf {2}} \ mathsf {D-Fi} $ 适用于以控制为中心的工业应用。