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 37.544
Universal Terrestrial Radio Access (UTRA) and Evolved UTRA (E-UTRA); User Equipment (UE) Over The Air (OTA) performance; Conformance testing
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.571-1
User Equipment (UE) conformance specification for UE positioning; Part 1: Conformance test specification
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.571-2
User Equipment (UE) conformance specification for UE positioning; Part 2: Protocol conformance
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.571-3
User Equipment (UE) conformance specification for UE positioning; Part 3: Implementation Conformance Statement (ICS)
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.571-4
User Equipment (UE) conformance specification for UE positioning; Part 4: Test suites
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.571-5
User Equipment (UE) conformance specification for UE positioning; Part 5: Test scenarios and assistance data
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.843
Evolved Universal Terrestrial Radio Access (E-UTRA) and Universal Terrestrial Radio Access (UTRA); Radio Frequency (RF) requirement background for Active Antenna System (AAS) Base Station (BS) radiated requirements
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.872
Supplementary uplink (SUL) and LTE-NR co-existence
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.876
Study on eNB(s) Architecture Evolution for E-UTRAN and NG-RAN
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.885
Study on evaluation methodology of new Vehicle-to-Everything (V2X) use cases for LTE and NR
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.890
Feasibility Study on 6 GHz for LTE and NR in Licensed and Unlicensed Operations
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.900
Radio Frequency (RF) requirements for Multicarrier and Multiple Radio Access Technology (Multi-RAT) Base Station (BS)
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.901
User Equipment (UE) application layer data throughput performance
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.910
Study on self evaluation towards IMT-2020 submission
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.941
Radio Frequency (RF) conformance testing background for radiated Base Station (BS) requirements
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.976
Measurement of radiated performance for Multiple Input Multiple Output (MIMO) and multi-antenna reception for High Speed Packet Access (HSPA) and LTE terminals
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25
TS 37.977
Universal Terrestrial Radio Access (UTRA) and Evolved Universal Terrestrial Radio Access (E-UTRA); Verification of radiated multi-antenna reception performance of User Equipment (UE)
Architecture
Rel-15TSMulti-RATUpdated 2026-07-25