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TSN, or Time Sensitive Networking, is becoming an essential technology for integrated networks, enabling deterministic and best effort traffic to coexist on the same infrastructure. In order to properly configure, run and secure such TSN, monitoring functionality is a must. The TSN standard already has some preparations to provide such functionality and there are different methods to choose from. We implemented different methods to measure the time synchronisation accuracy between devices as a C library and compared the measurement results. Furthermore, the library has been integrated into the ControlTSN engineering framework.
Time-Sensitive Networking (TSN) promises deterministic, seamless and vendor independent communication in modern networked systems, utilizing the generalized Precision Time Protocol (gPTP) as governed by IEEE 802.1AS for precise time synchronization. As network complexity increases, effective monitoring of synchronization accuracy, incorporating both advanced and traditional methods, becomes crucial. This paper examines the implementation and performance of time synchronization monitoring methods for gPTP, including Monitoring Type Length Value (TLV) for Ingress & Egress messages, Reverse Sync, and Pulse per Second (PPS) techniques across varied hardware environments and operational conditions. We detail the integration process, discuss the adaptability of these methods under stress tests, and evaluate their effectiveness through rigorous assessments. The findings contribute to refining monitoring deployment strategies by identifying the most effective combinations of monitoring techniques to enhance synchronization accuracy and network reliability.