TS 38.321 relationship map
NR MAC
Release-aware filtering uses explicit relationship validity where mapped and official initial-release metadata where available. Unknown relationship validity remains visible and labelled rather than guessed.
Canonical Atlas record
NR; Medium Access Control (MAC) protocol specification
NR MAC
Release-aware filtering uses explicit relationship validity where mapped and official initial-release metadata where available. Unknown relationship validity remains visible and labelled rather than guessed.
Release evolution
Use indexed version, Work Item and Change Request evidence to see what changed around this specification. This is an evidence trail, not a clause-by-clause normative diff.
Release ledger
Rel-19 snapshot
120 indexed Change Requests · 13 connected Work Items.
Showing 12 CR records from the available cross-release sample. Browse release CR records (JSON) →
CR 2203 rev.1 — Correction on no LP-WUS monitoring during measurement gaps
CR 2194 rev.1 — Correction on criteria for starting timer after reception of LPWUS in RRC_CONNECTED
CR 2196 rev.2 — Miscellaneous corrections on MAC for Mob Ph4
CR 2158 rev.3 — Miscellaneous corrections on MAC for Mob Ph4
CR 2178 rev.1 — Miscellaneous corrections for network energy saving enhancements to TS 38.321
CR 2170 rev.1 — Corrections on early CSI reporting during measurement gap
CR 2173 rev.1 — Correction to DSR MAC CE
CR 2179 rev.1 — Corrections on PTAG TAT expiry during CLTM
CR 2188 — Correction to MAC for SL POS
CR 2166 rev.1 — LP-WUS monitoring during short DRX cycle
CR 2177 rev.2 — Corrections on PHR for the serving cell configured with mTRP UL Transmission
CR 2180 — Correction on DRX for LP-WUS
Version history
Showing 60 of 80 indexed versions.
Atlas classifications
No Atlas classifications have been attached yet.
Work Items
Core part: L2 latency reduction techniques for LTE
Core part: DL interference mitigation for UMTS
Core part:Quality of Experience (QoE) Measurement Collection for streaming services in E-UTRAN
Core part: Further video enhancements for LTE
Core part: Enhancing LTE CA Utilization
Core part: Enhancements to LTE operation in unlicensed spectrum
New Radio Access Technology
Core part: New Radio Access Technology
5G V2X with NR sidelink
Core part: 5G V2X with NR sidelink
Enhancements to Framework for Live Uplink Streaming
Core part: LTE-NR & NR-NR Dual Connectivity and NR CA enhancements
Core part: 2-step RACH for NR
Core part: NR_IAB
Support of NR Industrial Internet of Things (IoT)
Core part: Support of NR Industrial Internet of Things (IoT)
Core part: Physical Layer Enhancements for NR URLLC
Core part: NR mobility enhancements
NR RF requirement enhancements for frequency range 2 (FR2)
Core part: NR RF requirement enhancements for FR2
UE Power Saving in NR
Core part: UE Power Saving in NR
Enhancements on MIMO for NR
Core part: Enhancements on MIMO for NR
Core part: NR positioning support
Core part: NR-based access to unlicensed spectrum
(Small) Technical Enhancements and Improvements for Rel-16
Historical association · verification pendingNB-IoT/eMTC support for Non-Terrestrial Networks
Further Multi-RAT Dual-Connectivity enhancements
Core part: Further Multi-RAT Dual-Connectivity enhancements
Core part: Support for Multi-SIM devices for LTE/NR
Core part: Further enhancements on MIMO for NR
Enhancements to Integrated Access and Backhaul (IAB) for NR
Core part: Enhancements to IAB for NR
Core part: Enhanced IoT and URLLC support for NR
Core part: NR multicast and broadcast services
Core part: NR and MR-DC measurement gap enhancements
Solutions for NR to support non-terrestrial networks (NTN)
Core part: Solutions for NR for NTN
Further enhancements of NR RF requirements for frequency range 2 (FR2)
Core part: NR Sidelink enhancement
Core part: NR Sidelink Relay
Core part: NR small data transmissions in INACTIVE state
Core part: UE power saving enhancements for NR
Core part: NR_cov_enh
Core part: Extending current NR operation to 71GHz
Core part: NR positioning enhancements
Core part: NR_redcap
Core part: Enhancement of RAN slicing for NR
(Small) Technical Enhancements and Improvements for Rel-17
Core part: Air-to-ground network for NR
Enhanced NR support for high speed train scenario in frequency range 2 (FR2)
Core part: Enhanced NR support for high speed train scenario in frequency range 2 (FR2)
Core part: Enhancements of NR Multicast and Broadcast Services
Core part: Multi-carrier enhancements for NR
Core part: NR MIMO evolution for downlink and uplink
Core part: Mobile Terminated-Small Data Transmission (MT-SDT) for NR
Core part: Further NR mobility enhancements
Core part: NR NTN (Non-Terrestrial Networks) enhancements
Even Further RRM enhancement for NR and MR-DC
NR sidelink evolution
Core part: NR sidelink evolution
Core part: NR sidelink relay enhancements
Core part: NR support for UAV (Uncrewed Aerial Vehicles)
Core part: XR (eXtended Reality) enhancements for NR
Further NR coverage enhancements
Core part: Further NR coverage enhancements
Core part: Mobile IAB (Integrated Access and Backhaul) for NR
NR network-controlled repeaters
Core part: NR network-controlled repeaters
Expanded and improved NR positioning
Core part: Expanded and improved NR positioning
Core part: Enhanced support of reduced capability NR devices
Core part: Network energy savings for NR
(Small) Technical Enhancements and Improvements for Rel-18
Core part: Artificial Intelligence (AI)/Machine Learning (ML) for NR air interface
Core part: Low-power wake-up signal and receiver for NR (LP-WUS/WUR)
NR MIMO Phase 5
Core part: NR MIMO Phase 5
NR mobility enhancements Phase 4
Core part: NR mobility enhancements Phase 4
Core part: Non-Terrestrial Networks (NTN) for NR Phase 3
Core part: NR sidelink multi-hop relay
XR (eXtended Reality) for NR Phase 3
Core part: XR (eXtended Reality) for NR Phase 3
Core part: Evolution of NR duplex operation: Sub-band full duplex (SBFD)
Core part: Enhancements of Network energy savings for NR
(Small) Technical Enhancements and Improvements for Rel-19
Knowledge graph
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