Adaptive time offset compensation for TDMA industrial wireless networks

Autor: Adam Kozłowski, Janusz Sosnowski
Rok vydání: 2021
Předmět:
Zdroj: Ad Hoc Networks. 119:102507
ISSN: 1570-8705
DOI: 10.1016/j.adhoc.2021.102507
Popis: Wireless network nodes working in industrial environment or mounted on mobile machines are exposed to frequent and unpredictable temperature changes, which impact local clock accuracy resulting in synchronization problems (time offset). These issues have to be taken into account when optimizing the network to avoid higher energy consumption and traffic congestion. The time offset problem can be alleviated using temperature driven compensation. In the paper we propose an efficient algorithm to resolve this problem taking into account slow and rapid temperature fluctuations. It combines the physical model of the node oscillator with an original prediction method based on the linear regression. It can be embedded in low cost microcontrollers with limited resources. Our approach needed some experimental studies of oscillator features and microcontroller capabilities. The implemented prototype nodes and performed tests proved high clock resilience for industrial environment as compared with other approaches.
Databáze: OpenAIRE