O-RAN Sync Standards Updates

•This document specifies the control plane, user plane and synchronization plane protocols used over the fronthaul interface linking the O-DU with the O-RU.

•Latest version: ORAN.WG4.CUS.0.v21.00 – June 2026.

•Definition of the sync configurations (LLS-C1, C2, C3 and C4)

•This document defines tests that validate the conformance to the O-RAN protocols for the Lower Layer Split Option 7.2x interface between the O-RU and the O-DU, including Sync Plane conformance tests.

•Latest version: ORAN.WG4.CONF.0.v16.00 –June 2026

•This document specifies the interoperability testing (IOT) for O-DU and O-RU from different vendors connected using the O-RAN fronthaul (FH) interface, including system level tests to validate both S-Plane functionality and S-Plane performance.

•Latest version : O-RAN.WG4.IOT.0-v16.00 –June 2026

•no relevant updates to sync part in this release.

•This document describes best practices for O-RAN Architecture and Solution for X-haul timing & synchronization

•Latest version: ORAN.WG9.XTRP-SYN.0.v08.00 – June 2026.

•New revisions have included requirements for sync network monitoring including GNSS monitoring.

•This document defines the testing requirements for an Open Xhaul transport infrastructure, including Synchronization Testing

•Latest version: ORAN.WG9.XTRP-TST-v06.00 –June2026.

•Focus on G.8275.1 (G.8275.2 for further study)

•Applicable to field tests and lab tests; For lab cases, the type and number of inserted Transport Node Elements (TNE) will be determined by operators

•This document provides description of the Security Tests, which validate security functions and configurations per security and security protocols requirements and are based on the priority of the risk analysis for O-RAN systems.

•Latest version: O-RAN.WG11.TS.STS-R005-v13.00 – June 2026.

•Includes S-Plane security related tests