Release Rel-17
5G NRExtends 5G NR to new device classes and satellite access.
Frozen 2022-03-231,408 specifications
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 29.328
IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.329
Sh interface based on the Diameter protocol; Protocol details
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.332
Media Gateway Control Function (MGCF) - IM Media Gateway; Mn interface
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.333
Multimedia Resource Function Controller (MRFC) - Multimedia Resource Function Processor (MRFP) Mp interface; Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.334
IMS Application Level Gateway (IMS-ALG) – IMS Access Gateway (IMS-AGW); Iq Interface; Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.335
User Data Convergence (UDC); User data repository access protocol over the Ud interface; Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.336
Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.337
Diameter-based T4 Interface for communications with packet data networks and applications
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.338
Diameter based protocols to support Short Message Service (SMS) capable Mobile Management Entities (MMEs)
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.343
Proximity-services (ProSe) function to ProSe application server aspects (PC2); Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.344
Proximity-services (ProSe) function to Home Subscriber Server (HSS) aspects; Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.345
Inter-Proximity-services (Prose) function signalling aspects; Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.364
IP Multimedia Subsystem (IMS) Application Server (AS) service data descriptions for AS interoperability
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.368
Tsp interface protocol between the MTC Interworking Function (MTC-IWF) and Service Capability Server (SCS)
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.379
Mission Critical Push To Talk (MCPTT) call control interworking with Land Mobile Radio (LMR) systems; Stage-3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.380
Mission Critical Push To Talk (MCPTT) media plane control interworking with Land Mobile Radio (LMR) systems; Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.388
V2X Control Function to Home Subscriber Server (HSS) aspects (V4); Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.389
Inter-V2X Control Function Signalling aspects (V6); Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.405
Nq and Nq' Application Protocol (Nq-AP); Stage 3
Architecture
Rel-17TS5GCUpdated 2026-07-25
TS 29.413
Application of the NG Application Protocol (NGAP) to non-3GPP access
Protocol
Rel-17TS5GCUpdated 2026-07-25