Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-141,188 specifications
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 29.332
Media Gateway Control Function (MGCF) - IM Media Gateway; Mn interface
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.333
Multimedia Resource Function Controller (MRFC) - Multimedia Resource Function Processor (MRFP) Mp interface; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.334
IMS Application Level Gateway (IMS-ALG) – IMS Access Gateway (IMS-AGW); Iq Interface; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.335
User Data Convergence (UDC); User data repository access protocol over the Ud interface; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.336
Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.337
Diameter-based T4 Interface for communications with packet data networks and applications
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.338
Diameter based protocols to support Short Message Service (SMS) capable Mobile Management Entities (MMEs)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.343
Proximity-services (ProSe) function to ProSe application server aspects (PC2); Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.344
Proximity-services (ProSe) function to Home Subscriber Server (HSS) aspects; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.345
Inter-Proximity-services (Prose) function signalling aspects; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.364
IP Multimedia Subsystem (IMS) Application Server (AS) service data descriptions for AS interoperability
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.368
Tsp interface protocol between the MTC Interworking Function (MTC-IWF) and Service Capability Server (SCS)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.388
V2X Control Function to Home Subscriber Server (HSS) aspects (V4); Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.389
Inter-V2X Control Function Signalling aspects (V6); Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.405
Nq and Nq' Application Protocol (Nq-AP); Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.413
Application of the NG Application Protocol (NGAP) to non-3GPP access
Protocol
Rel-15TS5GCUpdated 2026-07-25
TS 29.414
Core network Nb data transport and transport signalling
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.415
Core network Nb interface user plane protocols
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.468
Group Communication System Enablers for LTE (GCSE_LTE); MB2 reference point; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.500
5G System; Technical Realization of Service Based Architecture; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25