Time Slotted Channel Hopping (TSCH) is a medium access protocol defined in the IEEE 802.15.4 standard. It has been demonstrated to be one of the most reliable options when it comes to industrial applications. TSCH offers a degree of large flexibility and can be tailored to the requirements of specific applications. Several performance aspects of TSCH have been investigated so far, such as the energy consumption, the reliability, scalability and many more. However, mobility in TSCH networks remains an aspect that has not been thoroughly explored. In this paper we examine how TSCH performs under mobility situations. We define two mobile scenarios: one where autonomous agriculture vehicles move on a predefined trail, and a warehouse logistics scenario, where autonomous robots/vehicles and workers move randomly. We examine how different TSCH scheduling approaches perform on these mobility patterns and when different number of nodes are operating. The results show that the current TSCH scheduling approaches are not able to handle mobile scenarios efficiently. Moreover, the results provide insights on how TSCH scheduling can be improved for mobile applications.

翻译：在工业应用方面,TSCH是一个最可靠的选择方案之一。TSCH具有很大的灵活性,可以根据具体应用的要求加以调整。迄今为止,已经对TSCH的若干性能方面进行了调查,例如能源消耗、可靠性、可缩放性以及许多其他方面。然而,TSCH网络的流动性仍是一个尚未彻底探讨的方面。在本文件中,我们研究了TSEE 802.15.4在流动情况下如何运行。我们定义了两种移动设想方案:一种是自主农业车辆在预先确定的轨迹上行驶,另一种是仓库物流设想,即自主机器人/车辆和工人随机移动。我们研究了TSCH在移动模式上和不同节点运行时采用不同的时间安排方法。结果显示,目前TCH的时间安排方法无法有效处理移动情景。此外,结果还揭示了TSCH如何改进移动应用的时间安排。