Implementation and Evaluation of the RBIS Protocol in 5G

5G that is strongly focused on improvements on QoS and QoS guarantees, which are necessary for industrial deployments, enables novel use cases. Here, nearly each use case requires time synchronization of the involved systems. While PTP in its variations, e.g. IEEE 1588 v2.1 or IEEE 802.1AS, has established as standard for wireline systems, time synchronization of wireless or hybrid systems is still subject to research. Thus, the so-called RBIS protocol, which was originally developed and investigated for Wi-Fi, is mapped to 5G. This is possible, because both systems are infrastructure based and a suitable broadcast that fits to the requirements of RBIS protocol can be found in the control layer of 5G NR. Even if the $1 \mu\text{s}$ requirement that is required by some applications is not yet cracked, the accuracy of $1. 3 \mu\text{s}$ and precision of $\leq 4. 3 \mu\text{s}$ for non-invasive extension of existing 5G deployments is highly promising.