Time Synchronization for 5G and TSN Integrated Networking

TL;DR

This paper enhances time synchronization in 5G and TSN integrated networks, achieving microsecond-level precision to support reliable industrial applications involving mobile robots and collaborative operations.

Contribution

It introduces improved synchronization mechanisms for 5G+TSN integration, addressing multi-gNB, retransmission, and mobility challenges, validated through systematic simulation.

Findings

Achieved 1 microsecond synchronization precision in industrial environments

Demonstrated interoperability between 5G and TSN nodes

Validated improvements through simulation in large industrial areas

Abstract

Emerging industrial applications involving robotic collaborative operations and mobile robots require a more reliable and precise wireless network for deterministic data transmission. To meet this demand, the 3rd Generation Partnership Project (3GPP) is promoting the integration of 5th Generation Mobile Communication Technology (5G) and Time-Sensitive Networking (TSN). Time synchronization is essential for deterministic data transmission. Based on the 3GPP's vision of the 5G and TSN integrated networking with interoperability, we improve the time synchronization of TSN to conquer the multi-gNB competition, re-transmission, and mobility problems for the integrated 5G time synchronization. We implemented the improvement mechanisms and systematically validated the performance of 5G+TSN time synchronization. Based on the simulation in 500m x 500m industrial environments, the improved time synchronization achieved a precision of 1 microsecond with interoperability between 5G nodes and TSN nodes.