High-performance real-time wireless connectivity is at the heart of the Industrial Internet of Things (IIoT). Realizing wireless closed-loop control is crucial for various mission-critical IIoT systems. The existing wireless technologies fall short of meeting the stringent performance requirements of the closed-loop control. This article presents a novel wireless solution, called generalized closed-loop control of processes (GALLOP), for realizing closed-loop control over multihop or single-hop networks. GALLOP adopts a pragmatic design approach for addressing the challenges of wireless closed-loop control. The key design aspects of GALLOP include control-aware bidirectional scheduling for cyclic exchange, robust retransmission techniques based on cooperative multiuser diversity, and low-overhead signaling for scalable operation. GALLOP has been specifically designed for control loops that are closed over the whole network with dynamics on the order of a few milliseconds. The performance evaluation based on extensive system-level simulations and hardware implementation on a Bluetooth 5 testbed demonstrates that GALLOP provides high-performance connectivity with very low and deterministic latency, very high reliability and high scalability, to meet the stringent requirements of wireless closed-loop control for versatile IIoT applications.

中文翻译：

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闭环：用于在工业物联网应用中实现无线闭环控制的高性能连接解决方​​案


高性能实时无线连接是工业物联网 (IIoT) 的核心。实现无线闭环控制对于各种关键任务工业物联网系统至关重要。现有的无线技术无法满足闭环控制严格的性能要求。本文提出了一种新颖的无线解决方案，称为广义过程闭环控制 (GALLOP)，用于实现多跳或单跳网络的闭环控制。 GALLOP采用务实的设计方法来应对无线闭环控制的挑战。 GALLOP 的关键设计方面包括用于循环交换的控制感知双向调度、基于协作多用户分集的鲁棒重传技术以及用于可扩展操作的低开销信令。 GALLOP 专为整个网络上闭合的控制回路而设计，其动态范围约为几毫秒。基于广泛的系统级仿真和蓝牙 5 测试台上的硬件实现的性能评估表明，GALLOP 提供高性能连接，具有非常低的确定性延迟、非常高的可靠性和高可扩展性，可以满足无线闭环的严格要求控制多功能 IIoT 应用。