Rady Mina, Lampin Quentin, Barthel Dominique, Watteyne Thomas
Orange Labs, 38240 Meylan, France.
The National Institute for Research in Computer Science and Automation (Inria), EVA Team, 75012 Paris, France.
Sensors (Basel). 2021 Feb 25;21(5):1611. doi: 10.3390/s21051611.
New radio chips implement different physical layers, allowing firmware to change modulation, datarate and frequency dynamically. This technological development is an opportunity for industrial low-power wireless networks to offer even higher determinism, including latency predictability. This article introduces 6DYN, an extension to the IETF 6TiSCH standards-based protocol stack. In a 6DYN network, nodes switch physical layer dynamically on a link-by-link basis, in order to exploit the diversity offered by this new technology agility. To offer low latency and high network capacity, 6DYN uses heterogeneous slot durations: the length of a slot in the 6TiSCH schedule depends on the physical layer used. This article shows how reserved bits in 6TiSCH headers can be used to standardize 6DYN and details its implementation in OpenWSN, a reference implementation of 6TiSCH.
新型无线电芯片实现了不同的物理层，使固件能够动态改变调制方式、数据速率和频率。这一技术发展为工业低功耗无线网络提供了一个机会，使其能够提供更高的确定性，包括延迟可预测性。本文介绍了6DYN，它是对基于IETF 6TiSCH标准的协议栈的扩展。在6DYN网络中，节点基于逐个链路动态切换物理层，以利用这种新技术灵活性所提供的多样性。为了提供低延迟和高网络容量，6DYN使用异构时隙持续时间：6TiSCH调度中的时隙长度取决于所使用的物理层。本文展示了如何使用6TiSCH报头中的保留位来标准化6DYN，并详细介绍了其在OpenWSN（6TiSCH的参考实现）中的实现。
