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 29.108
Application of the Radio Access Network Application Part (RANAP) on the E-interface
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.109
Generic Authentication Architecture (GAA); Zh and Zn Interfaces based on the Diameter protocol; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.116
Representational state transfer over xMB reference point between content provider and BM-SC
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.118
Mobility Management Entity (MME) - Visitor Location Register (VLR) SGs interface specification
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.119
GPRS Tunnelling Protocol (GTP) specification for Gateway Location Register (GLR)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.120
Mobile Application Part (MAP) specification for Gateway Location Register (GLR)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.122
T8 reference point for Northbound APIs
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.128
Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) interfaces for interworking with packet data networks and applications
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.139
3GPP system - fixed broadband access network interworking; Home (e)Node B - security gateway interface
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.153
Service capability exposure functionality over Ns reference point
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.154
Service capability exposure functionality over Nt reference point
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.155
Traffic steering control; Representational State Transfer (REST) over St reference point
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.162
Interworking between the IM CN subsystem and IP networks
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.163
Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.164
Interworking between the 3GPP CS domain with BICC or ISUP as signalling protocol and external SIP-I networks
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.165
Inter-IMS Network to Network Interface (NNI)
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.168
Cell Broadcast Centre interfaces with the Evolved Packet Core; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.171
Location Services (LCS); LCS Application Protocol (LCS-AP) between the Mobile Management Entity (MME) and Evolved Serving Mobile Location Centre (E-SMLC); SLs interface
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.172
Location Services (LCS); Evolved Packet Core (EPC) LCS Protocol (ELP) between the Gateway Mobile Location Centre (GMLC) and the Mobile Management Entity (MME); SLg interface
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.173
Location Services (LCS); Diameter-based SLh interface for Control Plane LCS
Architecture
Rel-15TS5GCUpdated 2026-07-25