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TS 38.300 (RAN2)
NR – Overall description – Stage 2

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V15.4.0 (PDF)2018/12  … p.




Rapporteur:  Mr. SEBIRE, Benoist
See also:  TS 25.300 (UTRAN)  TS 36.300 (E-UTRAN) 

The present document provides an overview and overall description of the NG-RAN and focuses on the radio interface protocol architecture of NR connected to 5GC (E-UTRA connected to 5GC is covered in the 36 series).

An NG-RAN node is either:
  • a gNB, providing NR user plane and control plane protocol terminations towards the UE; or
  • an ng-eNB, providing E-UTRA user plane and control plane protocol terminations towards the UE.
The gNBs and ng-eNBs are interconnected with each other by means of the Xn interface. The gNBs and ng-eNBs are also connected by means of the NG interfaces to the 5GC, more specifically to the AMF (Access and Mobility Management Function) by means of the NG-C interface and to the UPF (User Plane Function) by means of the NG-U interface.