Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-1437 specifications in series 37
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 37.104
NR, E-UTRA, UTRA and GSM/EDGE; Multi-Standard Radio (MSR) Base Station (BS) radio transmission and reception
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.105
Active Antenna System (AAS) Base Station (BS) transmission and reception
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.106
User Equipment (UE) requirements for shared spectrum channel access
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.107
Base Station (BS) requirements and conformance tests for shared spectrum channel access
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.113
NR, E-UTRA, UTRA and GSM/EDGE; Multi-Standard Radio (MSR) Base Station (BS) Electromagnetic Compatibility (EMC)
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.114
Active Antenna System (AAS) Base Station (BS) Electromagnetic Compatibility (EMC)
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.141
NR, E-UTRA, UTRA and GSM/EDGE; Multi-Standard Radio (MSR) Base Station (BS) conformance testing
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.144
User Equipment (UE) and Mobile Station (MS) GSM, UTRA and E-UTRA over the air performance requirements
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.145-1
Active Antenna System (AAS) Base Station (BS) conformance testing; Part 1: conducted conformance testing
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.145-2
Active Antenna System (AAS) Base Station (BS) conformance testing; Part 2: radiated conformance testing
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.171
Universal Terrestrial Radio Access (UTRA) and Evolved UTRA (E-UTRA); User Equipment (UE) performance requirements for Radio Access Technology (RAT) Independent Positioning Enhancements
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.213
Physical layer procedures for shared spectrum channel access
Physical Layer
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.320
Radio measurement collection for Minimization of Drive Tests (MDT); Overall description; Stage 2
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.324
Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Service Data Adaptation Protocol (SDAP) specification
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.340
Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Overall Description; Stage-2
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.355
LTE Positioning Protocol (LPP)
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.460
Iuant interface: General aspects and principles
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.461
Iuant interface: Layer 1
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.462
Iuant interface: Signalling transport
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.466
Iuant interface: Application part
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25