Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-14109 specifications in series 24
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 24.312
Access Network Discovery and Selection Function (ANDSF) Management Object (MO)
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.315
IP Multimedia Subsystem (IMS) Operator Determined Barring (ODB); Stage 3: protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.322
Tunnelling of IP Multimedia Subsystem (IMS) services over restrictive access networks; Stage 3
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.323
3GPP IP Multimedia Subsystem (IMS) service level tracing Management Object (MO)
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.333
Proximity-services (ProSe) Management Objects (MO)
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.334
Proximity-services (ProSe) User Equipment (UE) to ProSe function protocol aspects; Stage 3
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.337
IP Multimedia (IM) Core Network (CN) subsystem IP Multimedia Subsystem (IMS) inter-UE transfer; Stage 3
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.341
Support of SMS over IP networks; Stage 3
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.368
Non-Access Stratum (NAS) configuration Management Object (MO)
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.371
Web Real-Time Communications (WebRTC) access to the IP Multimedia (IM) Core Network (CN) subsystem (IMS); Stage 3; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.379
Mission Critical Push To Talk (MCPTT) call control; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.380
Mission Critical Push To Talk (MCPTT) media plane control; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.385
V2X services Management Object (MO)
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.386
User Equipment (UE) to V2X control function; protocol aspects; Stage 3
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.390
Unstructured Supplementary Service Data (USSD) using IP Multimedia (IM) Core Network (CN) subsystem IMS; Stage 3
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.391
Unstructured Supplementary Service Data (USSD) using IP Multimedia (IM) Core Network (CN) subsystem (IMS) Management Object (MO)
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.417
Management Object (MO) for Originating Identification Presentation (OIP) and Originating Identification Restriction (OIR) using IP Multimedia (IM) Core Network (CN) subsystem
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.424
Management Object (MO) for Extensible Markup Language (XML) Configuration Access Protocol (XCAP) over the Ut interface for Manipulating Supplementary Services (SS)
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.481
Mission Critical Services (MCS) group management; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.482
Mission Critical Services (MCS) identity management; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25