Keysight Technologies is a founding member and active contributor for O-RAN Alliance Work Group 4, primary editor of the O-RAN Alliance WG4 Fronthaul Conformance and Interoperability Test Specification. For testing over the O-RAN fronthaul interface, Keysight has successfully deployed with multiple industry players the RuSIM, a 4G and 5G UE and O-RU emulator. RuSIM enables infrastructure vendors, chipset providers and mobile operators and integrators to easily run functional testing, conformance testing and performance testing of O-RAN Distributed Unit over the option 7.2x functional split fronthaul interface. Fully scalable and virtualized, it runs on commercial-off-the-shelf servers without the need for L1 hardware accelerators or special purpose hardware, with a migration path towards Cloud. RuSIM enables network verification by generating IP traffic load, simulating applications running on multiple concurrent devices operating real voice and data sessions. Full protocol stack assessment is possible for 5G NR (NSA/SA) over eCPRI. O-DU full-stack testing can be performed with an optional wrap-around testing configuration, using CuSIM, the Keysight’s O-CU emulator. CoreSIM, the Keysight core emulator, makes O-DU+O-CU wrap-around testing possible. Validate 5G RAN functionalities, conformance and performance over the O-RAN fronthaul interface • Virtualized, migrating to Cloud • Full protocol stack assessment • Functional testing • Performance and load testing • Protocol conformance testing • Compliance testing against interoperability specifications • O-DU or O-DU-O-CU wrap-around testing options Find us at www.keysight.com Page 1

Despite the standard interface, O-DU testing presents several challenges. • O-DUs bring-up sequence, due to loose O-RAN standard in this area • Front-haul timing, given the tight requirements of O-RU, specifically for features like TDD, MIMO and multi-RU Carrier Aggregation • M-Plane implementation, where the intentional specification flexibility creates significant interoperability issues (i.e. YANG Object Models have 6,000+ parameters, with less than 3% mandatory) • CU-Plane, with O-DUs designed to work with very specific O-RU capabilities (i.e. only one O-RU category, or beamforming model...

MU-MIMO and Beamforming MU-MIMO emulation enables functional and/or stress testing of the O-DU’s proprietary scheduler, offering Customers a clear competitive advantage. Beamforming is a central element of 5G MU scheduling algorithms, however suitable MU-MIMO channel conditions are more difficult to recreate in laboratory. In order to test MU-MIMO functionality thoroughly, the O-DU scheduler must be stimulated with a Spatially-, frequency- and time-selective channel between O-RU and a sufficiently large population of UEs. Keysight RuSIM provides a joint emulation of O-RU, Spatial Channel and...

Easy and Intuitive User Interface The RuSIM share the same user interface as UeSIM, enabling a seamless user experience. RuSIM GUI provides an easy and intuitive way to manage system configuration and simulation parameters, customize device models and subscribers with different capabilities, create multiple subscribers or subscribers group scenarios, manage mobility for each subscriber or group of subscribers, edit and execute test scenarios. User has access to hundreds of comprehensive statistics in real-time during text execution with userconfigurable views. All statistics are also available...

Specifications Protocol IETF Specifications O-RAN Open Fronthaul Conformance Test Specification 2.00 and above. O-RAN Fronthaul Cooperative Transport Interface Transport Control Plane Specification 1.0 and above. O-RAN Fronthaul Interoperable Specification (IOT) 3.0 and above O-RAN Fronthaul Control, User and Plane Plane Specification 5.0 and above. O-RAN Management Plane Specification any version from v1.00 to 5.0 and above. O-RAN Management Plane -YANG Models 5.0 and above. O-RAN Cooperative Transport Plane Specification 1.0 – and above. O-RAN Cooperative Transport Transport Transport Plane...

Start validating your 5G network today: for interoperability and functional testing in terms of ultra-low latency, high reliability, extreme throughput and massive connectivity, you can rely on Keysight to provide highly scalable software solution. • Full protocol stack assessment for 5G NR (NSA/SA modes) over eCPRI interface • Functional testing layer by layer • Protocol conformance testing • Compliance testing against interoperability specifications • Wrap-around O-DU testing option with CuSIM, Keysight’s O-CU emulator • Wrap-around O-DU+O-CU testing with CoreSIM, Keysight’s Core emulator •...