AMF connectivity
Validate NG setup, UE-associated signalling and error behaviour between CU and AMF.
5G RAN / centralized unit
gNB CU Testing for controlled 5G signalling.
Validate the centralized RAN functions that coordinate NGAP, F1 control and user-plane separation across your 5G access network.
Explore gNB CU scenarios →Assurance coverage
Qualify centralised RAN control with confidence.
Run clear procedure tests across CU control interfaces and the AMF-facing access path.
CU–DU control plane
Test F1 setup, UE context setup and modification procedures across the disaggregated RAN.
DRB management
Check bearer mapping, QoS-flow handling and coordinated release procedures.
Supported 3GPP standards
gNB CU standards coverage.
Validate centralised NG-RAN functions against architecture, NGAP and F1 specifications.
NG-RAN architecture
Functional split and architecture for gNB-CU and gNB-DU.
NGAP
NG Application Protocol between NG-RAN and 5G Core.
F1AP
F1 Application Protocol across CU and DU functions.
Release-ready evidence
Expose RAN integration issues before rollout.
Give RAN and core teams shared proof of exactly what the CU signalled and how peers responded.
Protocol sequence checks
Confirm expected NGAP and F1AP sequencing across normal, rejected and recovery procedures.
Cross-domain validation
Qualify CU interaction with AMF and DU without dividing the evidence between toolsets.
gNB CU assurance
Build confidence in centralised RAN control.
See how FxTestEngine supports your gNB CU test strategy.
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