工业无线传感器网络中延迟分组耦合振荡器的建模与同步
Modelling and Synchronisation of Delayed Packet-Coupled Oscillators in Industrial Wireless Sensor Networks
摘要：
基于数学生物学中的脉冲耦合振荡器（PCO），提出了一种适用于时间敏感无线传感器网络（WSNs）的分组耦合振荡器（PkCOs）同步协议。通过对数据包交换和处理延迟的数学建模和分析，研究了延迟对同步性能的影响。延迟补偿策略（即，前馈控制）用于有效地消除延迟。通过将系统的参考输入配置为非零值，为PkCO提供简单的调度功能，以将分组传输事件分配给指定的时隙，以便最小化同步无线网络中分组冲突的可能性。给出了严格的理论证明，验证了该同步方案的收敛性和稳定性。最后，通过仿真和实验验证了具有时延补偿和调度策略的PkCO的有效性。实验结果还表明，所提出的PkCOs算法可以实现$26.3μs$（$1$ tick）精度的同步。
英文摘要：
In this paper, a Packet-Coupled Oscillators (PkCOs) synchronisation protocol is proposed for time-sensitive Wireless Sensor Networks (WSNs) based on Pulse-Coupled Oscillators (PCO) in mathematical biology. The effects of delays on synchronisation performance are studied through mathematical modelling and analysis of packet exchange and processing delays. The delay compensation strategy (i.e., feedforward control) is utilised to cancel delays effectively. A simple scheduling function is provided with PkCOs to allocate the packet transmission event to a specified time slot, by configuring reference input of the system to a non-zero value, in order to minimise the possibility of packet collision in synchronised wireless networks. The rigorous theoretical proofs are provided to validate the convergence and stability of the proposed synchronisation scheme. Finally, the simulations and experiments examine the effectiveness of PkCOs with delay compensation and scheduling strategies. The experimental results also show that the proposed PkCOs algorithm can achieve synchronisation with the precision of $26.3μs$ ($1$ tick).
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