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 24.628
Common Basic Communication procedures using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.629
Explicit Communication Transfer (ECT) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.642
Completion of Communications to Busy Subscriber (CCBS) and Completion of Communications by No Reply (CCNR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.647
Advice Of Charge (AOC) using IP Multimedia (IM) Core Network (CN) subsystem
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.654
Closed User Group (CUG) using IP Multimedia (IM) Core Network (CN) subsystem, Protocol Specification
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.890
CT WG1 aspects of 5G; System Phase 1
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.930
Signalling flows for the session setup in the IP Multimedia core network Subsystem (IMS) based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.969
Business trunking; Next Generation Corporate Network (NGCN) - Next Generation Network (NGN) interfaces implementation guide
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 24.980
Minimum requirements for support of MCPTT service over the Gm reference point
Protocol
Rel-15TSIMSUpdated 2026-07-25
TS 26.071
Mandatory speech CODEC speech processing functions; AMR speech Codec; General description
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.073
ANSI-C code for the Adaptive Multi Rate (AMR) speech codec
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.074
Mandatory speech codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec test sequences
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.077
Minimum performance requirements for Noise Suppresser; Application to the Adaptive Multi-Rate (AMR) speech encoder
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.090
Mandatory Speech Codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec; Transcoding functions
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.091
Mandatory Speech Codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec; Error concealment of lost frames
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.092
Mandatory speech codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec; Comfort noise aspects
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.093
Mandatory speech codec speech processing functions Adaptive Multi-Rate (AMR) speech codec; Source controlled rate operation
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.094
Mandatory speech codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec; Voice Activity Detector (VAD)
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.101
Mandatory speech codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec frame structure
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.102
Mandatory speech codec; Adaptive Multi-Rate (AMR) speech codec; Interface to Iu, Uu and Nb
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26