Topic explorer

connecting

Reviewed semantic catalogue · 2026-09-30. Records with reviewed release bounds are evaluated against Rel-20; unbounded records remain curated orientation metadata rather than guessed release claims. Coverage ↗

Topic Explorer

Navigate concepts that cut across series and WGs

Atlas taxonomy

RAN3 Architecture and Interfaces

Rel-15+ · active in Rel-20

NG-RAN control-plane architecture and the NG, Xn, F1, E1 and positioning interfaces maintained by RAN3.

NG-RANNGAPXnAPF1APE1APNRPPa

Open feature lineage →

Topic stack

RAN3 Architecture and Interfaces

NG-RAN

NGAP

XnAP

F1AP

E1AP

NRPPa

Trust model

Every relationship has provenance

✓ official◇ parsed● curated◌ inferred

Official = 3GPP metadata. Parsed = deterministic extraction. Curated = reviewed Atlas classification. Inferred = machine suggestion requiring review.

Reviewed semantic coverage ↗