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 29.250
Nu reference point between SCEF and PFDF for sponsored data connectivity
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.251
Gw and Gwn reference point for sponsored data connectivity
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.272
Evolved Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.273
Evolved Packet System (EPS); 3GPP EPS AAA interfaces
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.274
3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.275
Proxy Mobile IPv6 (PMIPv6) based Mobility and Tunnelling protocols; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.276
3GPP Evolved Packet System (EPS); Optimized handover procedures and protocols between E-UTRAN access and cdma2000 HRPD Access; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.277
Optimised handover procedures and protocol between EUTRAN access and non-3GPP accesses (S102); Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.278
Customized Applications for Mobile network Enhanced Logic (CAMEL) Phase 4; CAMEL Application Part (CAP) specification for IP Multimedia Subsystems (IMS)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.279
Mobile IPv4 (MIPv4) based mobility protocols; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.280
Evolved Packet System (EPS); 3GPP Sv interface (MME to MSC, and SGSN to MSC) for SRVCC
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.281
General Packet Radio System (GPRS) Tunnelling Protocol User Plane (GTPv1-U)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.282
Mobile IPv6 vendor specific option format and usage within 3GPP
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.283
Diameter data management applications
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.292
Interworking between the IP Multimedia (IM) Core Network (CN) subsystem (IMS) and MSC Server for IMS Centralized Services (ICS)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.303
Domain Name System Procedures; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.305
InterWorking Function (IWF) between MAP based and Diameter based interfaces
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.311
Service Level Interworking (SLI) for messaging services
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.328
IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.329
Sh interface based on the Diameter protocol; Protocol details
Architecture
Rel-15TS5GCUpdated 2026-07-25