IETF 6TiSCH, which is composed of the IEEE802.15.4e and IPv6 RPL protocols, is a highly reliable and low-power industrial wireless network protocol stack. IEEE802.15.4e is the medium access control (MAC) layer protocol of the protocol stack—it defines a time-slotted channel hopping communication mode. IPv6 RPL is the network layer protocol of the protocol stack—it allows multiple nodes to form a multi-hop network. Scheduling is vital to the 6TiSCH protocol stack, as it defines the MAC layer cells to send/receive by the network packets. Herein, we propose an efficient distributed scheduling function (EDSF) for 6TiSCH wireless networks; it fully considers the use probability and distance of cells rather than random selection. Additionally, a schedule collision detection algorithm is proposed to detect two pairs of neighbor nodes that use the same cell. It fully utilizes the historical statistical data from the cell packet delivery ratio. Finally, we implement the EDSF scheme and verify its performance through experiments on a 6TiSCH simulator. The experimental results show that our proposed scheme can achieve a low end-to-end latency without additional costs.

IETF 6TiSCH由IEEE802.15.4e和IPv6 RPL协议组成，是一种高可靠、低功耗的工业无线网络协议栈。IEEE802.15.4e是协议栈的媒体访问控制（MAC）层协议——它定义了一种时隙信道跳频通信模式。IPv6 RPL是协议栈的网络层协议——它允许多个节点组成一个多跳网络。调度对于 6TiSCH 协议栈至关重要，因为它定义了 MAC 层信元以通过网络数据包发送/接收。在此，我们提出了一种用于 6TiSCH 无线网络的高效分布式调度功能（EDSF）；它充分考虑了小区的使用概率和距离，而不是随机选择。此外，提出了一种调度冲突检测算法来检测使用同一小区的两对邻居节点。它充分利用了来自信元包投递率的历史统计数据。最后，我们实现了 EDSF 方案，并通过在 6TiSCH 模拟器上的实验验证了它的性能。实验结果表明，我们提出的方案可以在没有额外成本的情况下实现低端到端延迟。