10) Sub-system testing of Fujitsu O-RU
with Keysight O-DU emulator

Companies Participating
in this Scenario

Fujitsu provided the hardware and the software of the NR O-RU.

Keysight provided Open RAN Studio (O-DU emulator), N9040B UXA Signal Analyzer, M9384B VXG Microwave Signal Generator


Testbed setup

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


Device Under Test
Fujitsu O-RU n258

  • Radio: 5G NR TDD
  • Model: Fujitsu n258 RU
  • Antenna: 2TRX
  • Output power: NA
  • Management plane: Netconf/YANG (M-plane is supported)
  • Fronthaul Interface: O-RAN 7-2x split (Cat A)
  • External Interface: 25Gbps SFP
  • Channel Bandwidth: 100MHz; SCS: 30kHz
  • Frequency bands: n258 (FR2)
  • Frequency Synchronization: NA
  • Dimensions: NA

Test scenarios introduction

  • Scenarios M-Plane

Transport and Handshake
in IPv4 Environment (positive case)

This test validates that the O-RU properly executes the session establishment procedure with VLANs
and a DHCPv4 server. This test is applicable to IPv4 environments.

Subscription to Notifications

This test validates that the O-RU properly handles a NETCONF subscription to notifications.

Retrieval without Filter Applied

This test validates that the O-RU NETCONF Server executes a general get command.

Testing Results/Summary

In the tests, Fujitsu O-RU connects to the Keysight O-DU emulator in LLS-C1 mode via 25GE SFP28 fiber. For the M-Plane test, Fujitsu O-RU works as a Netconf server, and TIM M-Plane client works as a Netconf client. Fujitsu O-RU is assigned a dynamic IP address via the DHCP protocol.

Based on the pcap file of the O-RU in the fronthaul and the logs of Fujitsu O-RU, all 3 test cases meet the required O-RAN specifications.

Benefits for the Industry

  • 25Gbps fronthaul fiber physical (SFP28) connection integrated with the case of O-RAN fronthaul 7-2x split (CAT A)
  • Isolated signal-vendor O-RU solution integrated with the Keysight emulators
  • The NETCONF solution validated with the Fujitsu O-RU and TIM M-Plane client