Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-14118 specifications in series 23
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 23.283
Mission Critical Communication Interworking with Land Mobile Radio Systems
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.284
Local Call Local Switch (LCLS); Stage 2
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.285
Architecture enhancements for V2X services
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.292
IP Multimedia Subsystem (IMS) centralized services; Stage 2
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.303
Proximity-based services (ProSe); Stage 2
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.333
Multimedia Resource Function Controller (MRFC) - Multimedia Resource Function Processor (MRFP) Mp interface: Procedures descriptions
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.334
IP Multimedia Subsystem (IMS) Application Level Gateway (IMS-ALG) - IMS Access Gateway (IMS-AGW) interface: Procedures descriptions
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.335
User Data Convergence (UDC); Technical realization and information flows; Stage 2
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.379
Functional architecture and information flows to support Mission Critical Push To Talk (MCPTT); Stage 2
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.380
IMS Restoration Procedures
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.401
General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.402
Architecture enhancements for non-3GPP accesses
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.468
Group Communication System Enablers for LTE (GCSE_LTE); Stage 2
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.501
System architecture for the 5G System (5GS)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.502
Procedures for the 5G System (5GS)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.503
Policy and charging control framework for the 5G System (5GS); Stage 2
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.527
5G System; Restoration procedures
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.682
Architecture enhancements to facilitate communications with packet data networks and applications
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.715
Study on system enhancements for provision of access to restricted local operator services by an unauthenticated User Equipment (UE)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 23.722
Study on common Application Programming Interface (API) framework for 3GPP northbound APIs
Architecture
Rel-15TS5GCUpdated 2026-07-25