Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-1410 specifications in series 21
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 21.101
Technical Specifications and Technical Reports for a UTRAN-based 3GPP system
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.111
USIM and IC card requirements
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.201
Technical Specifications and Technical Reports for an Evolved Packet System (EPS) based 3GPP system
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.202
Technical Specifications and Technical Reports relating to the Common IP Multimedia Subsystem (IMS)
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.205
Technical Specifications and Technical Reports for a 5G based 3GPP system
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.801
Specification drafting rules
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.866
Study on Energy Efficiency Aspects of 3GPP Standards
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.900
Technical Specification Group working methods
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.905
Vocabulary for 3GPP Specifications
General
Rel-15TS3GPP SystemUpdated 2026-07-26
TS 21.915
Release 15 Description; Summary of Rel-15 Work Items
General
Rel-15TS3GPP SystemUpdated 2026-07-26