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 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
TS 22.001
Principles of circuit telecommunication services supported by a Public Land Mobile Network (PLMN)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.002
Circuit Bearer Services (BS) supported by a Public Land Mobile Network (PLMN)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.003
Circuit Teleservices supported by a Public Land Mobile Network (PLMN)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.004
General on supplementary services
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.011
Service accessibility
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.016
International Mobile station Equipment Identities (IMEI)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.022
Personalisation of Mobile Equipment (ME); Mobile functionality specification
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.024
Description of Charge Advice Information (CAI)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.030
Man-Machine Interface (MMI) of the User Equipment (UE)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.032
Immediate Service Termination (IST); Service description; Stage 1
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25