01) End-to-end system performance testing and functional sub-system pairing testing of Foxconn 5G NR O-RU and Radisys 5G NR O-DU/O-CU in connection

Participating in this Scenario

Foxconn provided 5G NR O-RU (hardware and software), and BBU server.

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

VIAVI Solutions provided 5G NR Core emulator (5GC) and UE emulator.


Testbed setup

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


Device Under Test
Foxconn RRU Outdoor Small Cell O-RU

  • Radio: 5G NR TDD
  • Model: RR4780B
  • Antenna: 16T16R
  • Output power: NA
  • Management plane: Netconf/YANG (M-plane almost
  • fully supported O1 partially supported)
  • Fronthaul Interface: O-RAN 7-2x split (Cat A)
  • External Interface: 1Gbps RJ45, GPS, MicroUSB, Power Jack
  • Channel Bandwidth: 100MHz
  • Frequency bands: n78, n79 (FR1)
  • Frequency Synchronization: GPS/PTP (IEEE1588v2)
  • Dimensions: 230 x 210 x 58 mm

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)

Foxconn BBU server FHES-521

  • Model: FHES-5211
  • Chassis: 2RU
  • Processor: 2 x Skylake 6148 (2x20C)
  • Memory: 128GB (24 RDIMM, up to 768GB)
  • Storage: NVMe/SATA 960GB SSD + Up to 12 HDD driver
  • Network:
  • 2 x GbE RJ45 ports
  • 2 x 10GbE SFP+ ports
  • PCIe Expansion:
  • 2 x PCIe 3.0 x16 FHHL(GPU, FPGA)
  • 2 x PCIe 3.0 x8 LP (VPU, NIC, QAT)
  • Dimensions: 446 x 711 x 87 mm

Test scenarios introduction

End-to-end testing of Radisys 5G NR O-DU/O-CU connected over O-RAN Open Fronthaul (7-2x split) to Foxconn Outdoor Small cell 5G NR O-RU using VIAVI 5G NR core emulator, VIAVI E500 UE emulator, and Smartphone Huawei P40 Pro (as real test UE). The setup is based on 5G NR standalone architecture (using 5G network for both signalling and data transfer).

Scenario 1, Radio Layer 3 C-Plane establishment and Initial Radio U-Plane data transfer

The purpose of this test is to validate the essential radio operation of Radio Layer 3 C-Plane establishment, and initial Radio User-plane data transfer on a system level with the integration of O-DU/O-CU and O-RU from different vendors.

Scenario 2, UE E2E multiple attach/detach with Physical Handset (5 times)

The purpose of this test is to validate that UE can register to the network via O-RU and O-DU/O-CU, and the 5G NR core assigns an IP address after the successful RRC and NAS messages exchanges. The UE detaches in cases where UE must leave the cell area due to any possible reasons, for example, turn on airplane mode.

Testing Results/Summary

In this test, Foxconn O-RU connects over O-RAN Open Fronthaul 7-2x split to Radisys O-DU/O-CU. The first scenario focuses on the O-RAN Open Fronthaul interoperation, and the second scenario focuses on the end-to-end 5G NR signal call flow.

Based on the screenshot of the VIAVI emulator output, layer 3 C-plane establishment is successful and the measured throughput is the same as the generated traffic for both downlink and uplink directions.

Based on the logs from real test UE, the UE can attach to the network, sets the PDU session up, and transfer data in uplink as well as in downlink directions.

Benefits for the Industry

  • The validated End to End interoperable O-RU/O-CU/O-DU with Foxconn and Radisys solution.
  • The validated multivendor solution in the case of O-RAN Fronthaul 7-2x split(Cat A).
  • The validated COTS BBU Server hardware with FPGA-based the hardware acceleration for both O-CU and O-DU.
  • The validated emulators with the Viavi solution for the E2E O-RAN performance test.
  • The validated real commercial 5G SA UE in the case of the O-RAN solution.
  • The validated remote integration in the Berlin lab without the onsite O-RU and O-DU support team.