Data Sheet VIAVI Solutions O-CU Test DU SimOverview Features • First to market O-CU wraparound test compliant with latest 3gPp, O-RAN standards • Runs in lightweight VM on standard x86 hardware • CI/CD Automation Integration • Functional Testing • Performance, Capacity Testing • Supports Open source automation tools such as Jenkins • Optional Core Emulator, Core Tester The TeraVM O-CU Test DU Sim provides a comprehensive validation test suite for the O-CU part of the disaggregated gNB. The O-RAN Alliance is promoting the disaggregation of the gNB into three distinct, open and standardized elements: • O-RU: Open Radio Unit responsible for digital front end, lower part PHY layers • O-DU: Open Distributed Unit responsible for RLC, MA and higher part PHY layers • O-CU: Open Central Unit responsible for RRC and PDCP layers VIAVI is introducing a new O-RAN test suite to help vendors validate their products according to the O-RAN standards as well as Service Providers wishing to verify the interoperability of these components before launching their network. The TeraVM O-CU Test DU Sim is a software-based test tool housed on x86 hardware - compliant against 3GPP F1 application protocol and capable of emulating up to 64 DUs, 40 million connection attempts per hour, 50+ Gbps of traffic in order to functionally and load test the O-CU. To increase flexibility and cover a wider set of customer use cases additional optional elements of the test suite are available, shown in Figure 1. • 5G SA/NSA Core Emulator for use cases where a real Core Network is absent • X2 CU Tester for 5G NSA test use cases • Xn CU Tester for 5G SA test use cases

Preparing for the Challenges of O-RAN Fronthaul Testing The cellular industry is adopting cloud and virtual network technologies to simplify deployment, maintenance and optimize capital expenditure. To support this, one of the key objectives of the O-RAN Alliance is to bring uniformity in connectivity and test interfaces, and foster the use of off-the-shelf hardware as a means of reducing costs. Achieving these objectives opens new challenges for Network Equipment Manufacturers and Operators in particular. Some of the challenges include: y Challenge of guaranteeing performance with scale and...

Simultaneously emulate large number of DU nodes at F1 interface to CU. Deliver realistic traffic from large number of UEs. NSA test scenarios are supported, utilizing X2-C interface for signaling and X2-U data traffic for split bearer testing. The following functional test types available for O-CU Test DU Sim: X2 EN-DC Setup Procedure X2 EN-DC Configuration Update Procedure X2 EN-DC Partial Reset Secondary Node Addition (Option 3a, 3x) Secondary Node Release (Option 3a, 3x) Secondary Node Change (Option 3a, 3x) MeNB Change PCell Change Security Key Change Procedure Addition/Removal of SN terminated...

VIAVI has the largest dedicated 4G and 5G R&D team of any test company focusing on gNB, Core Network test. We work closely with our key customers to ensure that our roadmap is aligned to market needs and that we deliver test capability first. The O-CU Test DU Sim consists of the following network function and interfaces: The implemented features are according to the following specifications: (Contact VIAVI for latest Spec compliance) • 3GPP TS 36.423: E-UTRAN - X2 Application Protocol • 3GPP TS 38.473: NG-RAN F1 Application Protocol The TeraVM O-CU Test DU Sim is based on the POWEREDGE R740 server...

In the Lab VIAVI test tools are used to verify 5G telecommunications equipment prior to launch: • TM500 - Emulate thousands of UEs to test the gNB. Additionally, emulate the O-RU to test the O-DU (TM500 Fronthaul options) • TeraVM O-CU Test DU Sim - Simulates an O-DU to test the O-CU across the F1 interface • TeraVM Core Test - RAN Emulator capable of emulating millions of UEs and 10' of thousands of base stations to test a Core Network. • TeraVM Core Emulator - Emulates a 4G, 5G NSA or 5G SA Core network to test a base station In the field VIAVI provides test tools to install, configure and...