Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-1481 specifications in series 38
Key features: First 5G NR specifications, NSA and SA architectures
All SeriesSeries 21Series 22Series 23Series 24Series 26Series 27Series 28Series 29Series 31Series 32Series 33Series 34Series 35Series 36Series 37Series 38
TS 38.305
NG Radio Access Network (NG-RAN); Stage 2 functional specification of User Equipment (UE) positioning in NG-RAN
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.306
NR; User Equipment (UE) radio access capabilities
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.307
NR; Requirements on User Equipments (UEs) supporting a release-independent frequency band
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.321
NR; Medium Access Control (MAC) protocol specification
Protocol
Rel-15TS5G NRUpdated 2026-07-25
TS 38.322
NR; Radio Link Control (RLC) protocol specification
Protocol
Rel-15TS5G NRUpdated 2026-07-25
TS 38.323
NR; Packet Data Convergence Protocol (PDCP) specification
Protocol
Rel-15TS5G NRUpdated 2026-07-25
TS 38.331
NR; Radio Resource Control (RRC); Protocol specification
Protocol
Rel-15TS5G NRUpdated 2026-07-25
TS 38.401
NG-RAN; Architecture description
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.410
NG-RAN; NG general aspects and principles
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.411
NG-RAN; NG layer 1
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.412
NG-RAN; NG signalling transport
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.413
NG-RAN; NG Application Protocol (NGAP)
Protocol
Rel-15TS5G NRUpdated 2026-07-25
TS 38.414
NG-RAN; NG data transport
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.415
NG-RAN; PDU session user plane protocol
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.420
NG-RAN; Xn general aspects and principles
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.421
NG-RAN; Xn layer 1
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.422
NG-RAN; Xn signalling transport
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.423
NG-RAN; Xn Application Protocol (XnAP)
Protocol
Rel-15TS5G NRUpdated 2026-07-25
TS 38.424
NG-RAN; Xn data transport
Architecture
Rel-15TS5G NRUpdated 2026-07-25
TS 38.425
NG-RAN; NR user plane protocol
Architecture
Rel-15TS5G NRUpdated 2026-07-25