Time Slotted Channel Hopping (TSCH) is one of the Medium Access Control methods proposed in the IEEE 802.15.4e standard to deal with the requirements of the industrial Wireless Sensor Networks (WSNs), especially in terms of high reliability and low latency. The key feature of the TSCH method is the combination between a time slotted access with a channel hopping, while considering both shared and dedicated links. The latter are essential for ensuring transmissions without loss and additional delays. Therefore, the objective we are seeking to reach in this paper is to demonstrate the benefit use of dedicated links on industrial WSNs-based 802.15.4e TSCH method. To this end, we propose an analytical model-based Markov chains for the TSCH method taking into account the dedicated links, and we estimate the transmission probability \(\tau \) of a data packet. The latter will be then used to develop others analytical models, in order to derive a number of performance metrics, namely the average access delay, the reliability, the throughput, and the energy consumption. Furthermore, to validate the analytical model, we perform extensive simulations-based Monte-Carlo. Finally, to give credibility to the obtained simulation results, we compute \(95\%\) confidence intervals. Numerical results show that increasing the number of dedicated links reduces significantly the retransmission probability offering best network performances in terms of average access delay, reliability and throughput.

时隙信道跳跃 (TSCH) 是 IEEE 802.15.4e 标准中提出的一种媒体访问控制方法，用于满足工业无线传感器网络 (WSN) 的要求，尤其是在高可靠性和低延迟方面。TSCH 方法的关键特征是时隙接入与信道跳跃的结合，同时考虑了共享和专用链路。后者对于确保传输无损失和无额外延迟至关重要。因此，我们在本文中寻求达到的目标是展示专用链路在基于工业 WSN 的 802.15.4e TSCH 方法中的优势使用。为此，我们为 TSCH 方法提出了一种基于分析模型的马尔可夫链，并考虑了专用链路，并估计了传输概率\(\tau \)一个数据包。后者随后将用于开发其他分析模型，以推导出许多性能指标，即平均访问延迟、可靠性、吞吐量和能耗。此外，为了验证分析模型，我们执行了广泛的基于模拟的 Monte-Carlo。最后，为了使获得的模拟结果可信，我们计算\(95\%\)置信区间。数值结果表明，增加专用链路的数量会显着降低重传概率，从而在平均访问延迟、可靠性和吞吐量方面提供最佳网络性能。