05) Sub-system functional testing of Wiwynn/Radisys 5G NR O-DU/O-CU with
VIAVI O-RU emulator

Companies Participating
in this Scenario

Wiwynn provided a server (HW) for O-DU/O-CU.

Radisys provided 5G NR standalone O-DU and O-CU (software)

VIAVI Solutions provided 5G NR Core emulator (5GC), and O-RU/UE emulator (VIAVI E500).


Testbed setup

The connection details of the hardware in the lab are in the network topology diagram below.


Device Under Test
Radisys 5G NR O-DU/O-CU (software)

  • Management plane: Netconf/YANG
  • Fronthaul Interface: O-RAN 7-2x split (Cat A)
  • Channel Bandwidth: 100MHz
  • Frequency bands: n78, n41 (FR1)

Wiwynn server (HW) for O-DU/O-CU

  • Model: EP100
  • Chassis: OCP Edge Server
  • Processor: Intel Xeon Scalable Processor
  • Memory: 128 GB
  • Storage: 1TB 2.5” U.2/SATA drive
  • Network (NIC):
    • Intel X710 network adapter for OCP 3.0
    • PCIe Expansion:
  • O-DU: Intel FPGA Programmable Acceleration Card
  • O-CU: Intel QuickAssist Adapter
  • Dimensions:
    • Sled: 41 (H) x 215 (W) x 421.8 (D) mm
    • Chassis: 130.6 (H) x 442.4 (W) x 432 (D) mm

Test scenarios introduction

  • S-Plane test scenario

O-DU using ITU-T G.8275.1 profile
(LLS-C3) functional test

The purpose of this test is to validate that Wiwynn/Radisys O-DU/O-CU is correctly synchronized to a timing reference delivering PTP using the ITU-T G.8275.1 profile, and that the O-DU correctly collects the status based on the nominal synchronization conditions.

Testing Results/Summary

In this test, Wiwynn/Radisys O-DU/O-CU is running as Slave Clock. A PTP Master Clock device connects to Wiwynn/Radisys O-DU/O-CU and generates the stimulus for the O-DU (DUT) and retrieve its sync status.

Based on the .pcap tracing, the source clock MAC address in the O-DU is the same one of the PTP Master Clock; and the same clock-class is used in the O-DU as that send from the PTP Master Clock.

Benefits for the Industry

  • The validated LLS-C3 synchronization via the ITU-T G.8275.1 profile
    in Wiwynn/Radisys O-DU/O-CU solution.
  • Jumbo frame U-plane packets settings of Wiwynn/Radisys O-DU
    and the VIAVI O-RU emulator aligned in advance.
  • between the VIAVI O-RU emulator and Wiwynn/Radisys O-DU.