Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-14112 specifications in series 22
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 22.973
IMS Multimedia Telephony service; and supplementary services
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.977
Feasibility study for speech-enabled services
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.978
All-IP network (AIPN) feasibility study
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.979
Feasibility study on combined Circuit Switched (CS) calls and IP Multimedia Subsystem (IMS) sessions
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.980
Network composition feasibility study
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.982
Study of Customised Alerting Tone (CAT) requirements
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.983
Services alignment and migration
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.985
Service requirements for the User Data Convergence (UDC)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.986
Study on Service Specific Access Control
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.987
Study of haptic services requirements
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.988
Study on alternatives to E.164 for Machine-Type Communications (MTC)
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25
TS 22.989
Study on Future Railway Mobile Communication System
Service
Rel-15TS3GPP ServicesUpdated 2026-07-25