Release Rel-17
5G NRExtends 5G NR to new device classes and satellite access.
Frozen 2022-03-23118 specifications in series 38
Key features: RedCap (NR-Light), NR-NTN, multicast/broadcast, XR support
All SeriesSeries 21Series 22Series 23Series 24Series 26Series 27Series 28Series 29Series 31Series 32Series 33Series 34Series 35Series 36Series 37Series 38
TS 38.331
NR; Radio Resource Control (RRC); Protocol specification
Protocol
Rel-17TS5G NRUpdated 2026-07-25
TS 38.340
NR; Backhaul Adaptation Protocol (BAP) specification
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.351
NR; Sidelink Relay Adaptation Protocol (SRAP) Specification
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.401
NG-RAN; Architecture description
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.410
NG-RAN; NG general aspects and principles
Interface
Rel-17TS5G NRUpdated 2026-07-25
TS 38.411
NG-RAN; NG layer 1
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.412
NG-RAN; NG signalling transport
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.413
NG-RAN; NG Application Protocol (NGAP)
Interface
Rel-17TS5G NRUpdated 2026-07-25
TS 38.414
NG-RAN; NG data transport
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.415
NG-RAN; PDU session user plane protocol
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.420
NG-RAN; Xn general aspects and principles
Interface
Rel-17TS5G NRUpdated 2026-07-25
TS 38.421
NG-RAN; Xn layer 1
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.422
NG-RAN; Xn signalling transport
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.423
NG-RAN; Xn Application Protocol (XnAP)
Interface
Rel-17TS5G NRUpdated 2026-07-25
TS 38.424
NG-RAN; Xn data transport
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.425
NG-RAN; NR user plane protocol
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.455
NG-RAN; NR Positioning Protocol A (NRPPa)
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.460
NG-RAN; E1 general aspects and principles
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.461
NG-RAN; E1 layer 1
Architecture
Rel-17TS5G NRUpdated 2026-07-25
TS 38.462
NG-RAN; E1 signalling transport
Architecture
Rel-17TS5G NRUpdated 2026-07-25