VoNR Testing with SEGRON’s ATF
- Reading Time: 4 minutes
VoNR testing validates how a 5G network handles voice calls before customers ever place one. SEGRON used its Automated Testing Framework (ATF) to verify VoNR call setup, signalling, and voice quality end-to-end on real, unrooted smartphones for O2 Telefónica — using out-of-the-box devices and Layer-3 trace analysis, catching issues that lab simulations alone would miss.
General
- Interoperability Challenges Addressed: Implementing VoNR presents significant challenges in achieving interoperability with diverse devices and network elements. SEGRON’s automated testing solutions enable comprehensive testing of VoNR across a spectrum of devices, ensuring seamless interoperability within the intricate 5G ecosystem. Our powerful Layer-3 Trace analysis function meticulously examines necessary interfaces.
- Ensuring Quality of Service (QoS): The success of VoNR hinges on delivering an unparalleled quality of service for voice calls over 5G networks. SEGRON’s testing tools empower service providers to evaluate VoNR under diverse conditions, ensuring consistent high standards for voice quality and reliability.
- Streamlining Verification Processes: Automated testing, facilitated by SEGRON, streamlines and accelerates the verification processes crucial for VoNR integration. Through meticulously crafted test scenarios, our tools simulate real-world conditions, allowing service providers to assess performance, reliability, and interoperability of VoNR across various devices and network configurations.
VoNR Testing Setup & Scenarios
The adoption of 5G Voice over New Radio (VoNR) represents the future for many operators. To achieve this, 3GPP standards define that the 5G network must provide voice services using 5G NR, 5G Core, and IMS. This article takes a deeper look into the testing setup and scenarios, outlining the milestones for establishing a VoNR call.
Voice over NR Call Setup in High Level:
To establish a VoNR call, there are five critical call setup milestones:
1. UE detects a 5G NR Cell and starts 5G Registration to 5G NR(gNB) and 5GC.
2. The ims PDU is established to DNN “ims” with non-GBR QoS Flow and 5QI=5. (Data Network Name (DNN) is equal to APN in 4G LTE)
3. The data PDU is established to DNN “internet” with non-GBR QoS Flow and 5QI=6-9. IMS and Data PDU sessions (steps 2 & 3) can be established in reverse order.
4. UE does the registration process with IMS using SIP over the IMS PDU Session. VoNR call flow closely resembles VoLTE call flow.
5. UE creates a dedicated PDU Session (using GBR QoS Flow and 5QI=1) applicable for MO and MT VoNR call directions.
Example: Deep Packet Inspection for verifying Voice over NR Call setup procedure using SEGRON’s Layer-3 Trace Analysis Method
Voice over NR call setup is a procedure across multiple network domains – 5G RAN, 5G Core, and IMS. There are defined UE and network-related criteria to meet for establishing a VoNR call. For instance, even though UE is registered to 5G RAN and 5G Core successfully, some network-related events may force the gNB to perform EPS-Fallback. Hence, SEGRON introduces Deep Packet Inspection (DPI) principles to verify the accuracy of five key messages essential for Voice over NR establishment. This ensures proper verification that the call was established via 5G VoNR and not fallen back to EPS during call setup due to a lack of NR resources or any other 5G cell restrictions.
User Friendly Reporting Interface
Our well-designed reporting interface incorporates all needed information to transform complex data into easily understandable insights. Based on that, the correctness of all the above-mentioned message flows can be seen at a glance in the clearly structured test report:
Ready to run VoNR testing like this on your own network? SEGRON’s ATF automates VoNR call-setup, QoS, and Layer-3 trace verification on real, unrooted smartphones — CI/CD-ready, no manual scripts required.
SEGRON's VoNR Testing Expertise
SEGRON’s reputation as an innovative provider of automated testing solutions makes the company a natural partner for testing state of the art communication networks in lab and live environments. The sophistication and efficiency of SEGRON’s testing tools provide our customers with the right tools to properly test their services, making the company the first choice for VoNR implementation verification. This VoNR testing engagement with O2 Telefónica shows exactly how SEGRON’s ATF de-risks 5G voice rollouts before they reach live traffic.
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Frantisek Valent
Frantisek Valent is responsible for hardware product management and spearheading product innovations at SEGRON. With over 15 years of expertise in the telecom market, Frantisek is well-versed in diverse testing methodologies.
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