Release Notes#

This page details new features, bug fixes, performance improvements, limitations, and documentation updates by release.

ARC-OTA Release 1.6 (August, 2025)#

New Features and Bug Fixes#

  • 4T4R O-RUs

    • WNC 1220

    • WNC 3210

  • Multi-UE support

    • 55 UEs attach and ping (UE simulator over eCPRI)

    • 2 UEs traffic

  • Process SRS samples received from RU for use by L2 (4T4R; cabled)

  • Aerial Data Lake: Real-time I/Q sample capture from 2 cells

    • This enables real-time capture of samples to DRAM for use in real-time processing.

      • Previously, real-time samples were captured to SSD and only enabled offline processing, such as for model training or visualization.

    • Real-time processed samples can now be used by algorithms to perform closed-loop actions on L1/L2 with low latency.

  • Aerial CUDA-accelerated RAN software 25-2

  • OAI gNB SW: ARC1.6_integration branch (2025.w29 baseline)

Performance Improvements#

  • TDD pattern: DDDDD DSUUU

  • MIMO layers

    • DL: 4 layers

    • UL: 1 layer

  • Single cell peak throughput

    • 1 UE:

      • DL: ~1.2 Gbps

      • UL: ~126 Mbps

    • 2 UEs:

      • DL: ~1.4 Gbps

      • UL: ~75 Mbps

  • 2 cell aggregated peak throughput (1 UE per cell)

    • DL: ~1.4 Gbps

    • UL: ~180 Mbps

Deprecations#

  • Dell PowerEdge R750 Server + A100X HW is no longer supported.

  • Gigabyte Edge E251-U70 Server is no longer supported.

Known Issues and Workarounds#

  • There are connection drops after running iPerf traffic for some time. The UE will re-initiate the connection autonomously.

  • Data stalls with traffic to multiple UEs: Throughput occasionally drops to zero after running traffic with multiple UEs for some time. The current workaround is to restart the test.

ARC-OTA Release 1.5 (July, 2024)#

New Features and Bug Fixes#

  • Grace Hopper integration

    • OAI ARM CPU support

    • Hopper GPU cuBB support

  • CBRS O-RU

  • CBRS RU Interop

  • Multi-UE support

  • Multi-UE CSI dataset blueprint (using Aerial Data Lake and PyAerial)

  • Updated OAI branch 2024.w21+ARC1.5

  • Multi-L2 Support (2 Cells)

Tip

For additional context, you can also review the artifacts in the 2024.w21+ARC1.5 branch.

Note

The Grace Hopper platform requires OAI CN version 2024-June.

Performance Improvements#

  • MIMO layers

    • DL: 2 layers -> 4 layers

  • Peak throughput

    • SMC-GH

      • DL: ~460Mbps -> ~1.03Gbps

      • UL: ~112Mbps -> ~125Mbps

    • Dell R750 / Gigabyte Edge E251-U70

  • Multi-L2 (2 Cell) throughput

    • SMC-GH

      • DL: ~700Mbps (per Cell)

      • UL: ~105Mbps (per Cell)

ARC-OTA Release 1.3 (May, 2024)#

New Features and Bug Fixes#

  • Full support for master gitlab repo gitlab.eurecom.fr/oai/ making it available for use, modification and distribution. Refer to the Licensing page for the OAI license.

    • OAI_Aerial private branch is deprecated and will no longer be maintained.

  • Developer extension - Sterling k8 service management and monitoring (refer to this document for more details)

  • Updated OAI branch 2024.w15 with a standalone patch (w15.4).

Performance Improvements#

  • Frame structure and slot format

    • DDDSU -> DDDSU + DDDDDDSUUU

  • Bi-directional UDP Traffic

    • > 3.5 hours exercised -> > 4.0 hours exercised

ARC-OTA Release 1.2 (March, 2024)#

New Features and Bug Fixes#

  • Support for the Dell R750 platform to host gNB

  • Support for NVIDIA Converged Accelerators A100X

  • Continued support for Gigabyte Edge E251-U70 with NVIDIA discrete cards A100 GPU, CX6-DX SmartNIC

  • OAI_Aerial_v2.2.1 updated to OAI_Aerial_v2.2.2

ARC-OTA Release A1.1 (January, 2024)#

New Features and Bug Fixes#

  • Kernel cmdline configuration updated.

  • Updates to the core assignment in the Aerial configuration.

  • Updates to PTP and phc2sys core assignment.

  • Changes to phc2sys cmdline.

  • Changes to the L2 Docker run cmd to use all non-isolated cores.

  • Changes to the L2 configuration, max DL MCS defaults to 25.

  • Removal of unnecessary ORU firmware installation step because of Foxconn firmware default updates.

  • OAI_Aerial_v2.0 updated to OAI_Aerial_v2.2.1 throughout.

Known Issues and Workarounds#

  • 256 QAM is not supported on ARC-OTA. You must disable 256 QAM support by issuing the following command at the gNB command license:

    --gNBs.[0].force_256qam_off
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