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 29.201
Representational State Transfer (REST) reference point between Application Function (AF) and Protocol Converter (PC)
Physical Layer
Rel-15TS5GCUpdated 2026-07-25
TS 29.202
Signalling System No. 7 (SS7) signalling transport in core network; Stage 3
Physical Layer
Rel-15TS5GCUpdated 2026-07-25
TS 29.204
Signalling System No. 7 (SS7) security gateway; Architecture, functional description and protocol details
Physical Layer
Rel-15TS5GCUpdated 2026-07-25
TS 29.205
Application of Q.1900 series to bearer independent Circuit Switched (CS) core network architecture; Stage 3
Physical Layer
Rel-15TS5GCUpdated 2026-07-25
TS 29.212
Policy and Charging Control (PCC); Reference points
Interface
Rel-15TSEPCUpdated 2026-07-25
TS 29.213
Policy and charging control signalling flows and Quality of Service (QoS) parameter mapping
Physical Layer
Rel-15TS5GCUpdated 2026-07-25
TS 29.214
Policy and charging control over Rx reference point
Physical Layer
Rel-15TS5GCUpdated 2026-07-25
TS 29.215
Policy and Charging Control (PCC) over S9 reference point; Stage 3
Physical Layer
Rel-15TS5GCUpdated 2026-07-25
TS 29.217
Policy and Charging Control (PCC); Congestion reporting over Np reference point
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.219
Policy and charging control: Spending limit reporting over Sy reference point
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.222
Common API Framework for 3GPP Northbound APIs
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.228
IP Multimedia (IM) Subsystem Cx and Dx Interfaces; Signalling flows and message contents
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.229
Cx and Dx interfaces based on the Diameter protocol; Protocol details
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.230
Diameter applications; 3GPP specific codes and identifiers
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.231
Application of SIP-I Protocols to Circuit Switched (CS) core network architecture; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.232
Media Gateway Controller (MGC) - Media Gateway (MGW) interface; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.235
Interworking between SIP-I based circuit-switched core network and other networks
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.238
Interconnection Border Control Functions (IBCF) - Transition Gateway (TrGW) interface, Ix interface; Stage 3
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.240
3GPP Generic User Profile (GUP); Stage 3; Network
Architecture
Rel-15TS5GCUpdated 2026-07-25
TS 29.244
Interface between the Control Plane and the User Plane nodes
Architecture
Rel-15TS5GCUpdated 2026-07-25