TS 38.423 relationship map
XnAP
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
NG-RAN; Xn Application Protocol (XnAP)
XnAP
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-16 snapshot
859 indexed Change Requests · 29 connected Work Items.
Showing 0 CR records from the available cross-release sample. Browse release CR records (JSON) →
Version history
Showing 60 of 85 indexed versions.
Atlas classifications
No Atlas classifications have been attached yet.
Work Items
Core part: LTE connectivity to 5G-CN
New Radio Access Technology
Core part: New Radio Access Technology
Enhancement of URLLC support in the 5G Core network
Historical association · verification pending5G V2X with NR sidelink
Core part: 5G V2X with NR sidelink
Core part: Direct data forwarding between NG-RAN and E-UTRAN nodes for inter-system mobility
Study on NR Industrial Internet of Things (IoT)
Core part: LTE-NR & NR-NR Dual Connectivity and NR CA enhancements
Additional MTC enhancements for LTE
Core part: Additional MTC enhancements for LTE
Additional enhancements for NB-IoT
Core part: Additional enhancements for NB-IoT
Private Network Support for NG-RAN
Core part: Private Network Support for NG-RAN
Core part: 2-step RACH for NR
Cross Link Interference (CLI) handling and Remote Interference Management (RIM) for NR
Core part: Cross Link Interference (CLI) handling and Remote Interference Management (RIM) 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: NR mobility enhancements
SON (Self-Organising Networks) and MDT (Minimization of Drive Tests) support for NR
Core part: SON (Self-Organising Networks) and MDT (Minimization of Drive Tests) support for NR
Core part: UE Power Saving in NR
Core part: NR positioning support
Core part: NR-based access to unlicensed spectrum
Optimisations on UE radio capability signalling NR/E-UTRA Aspects
Core part: Optimisations on UE radio capability signalling NR/E-UTRA Aspects
RAN aspects of 5G_SRVCC
(Small) Technical Enhancements and Improvements for Rel-16
Architecture enhancements for 3GPP support of advanced V2X services
Historical association · verification pendingCore part: Further Multi-RAT Dual-Connectivity enhancements
Support for Multi-SIM devices for LTE/NR
Core part: Support for Multi-SIM devices for LTE/NR
Support for Minimization of service Interruption
Historical association · verification pendingEnhancement of data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR and EN-DC
Core part: Enhancement of data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR standalone and MR-DC (Multi-Radio Dual Connectivity)
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
NR multicast and broadcast services
Core part: NR multicast and broadcast services
Solutions for NR to support non-terrestrial networks (NTN)
Core part: Solutions for NR for NTN
NR QoE magement and optimizations for diverse services
Core part: NR QoE management and optimizations for diverse services
NR Sidelink Relay
NR small data transmissions in INACTIVE state
Core part: NR small data transmissions in INACTIVE state
UE power saving enhancements for NR
Core part: UE power saving enhancements for NR
Core part: Extending current NR operation to 71GHz
RAN aspects of NR positioning enhancements
Core part: NR positioning enhancements
Support of reduced capability NR devices
Core part: NR_redcap
Enhancement of RAN slicing for NR
Core part: Enhancement of RAN slicing for NR
(Small) Technical Enhancements and Improvements for Rel-17
Core part: Artificial Intelligence (AI)/Machine Learning (ML) for NG-RAN
Core part: Air-to-ground network for NR
Core part: Dual Transmission/Reception (Tx/Rx) Multi-SIM for NR
Core part: Further enhancement of data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR and EN-DC
Core part: NR support for dedicated spectrum less than 5MHz for FR1
Core part: Enhancements of NR Multicast and Broadcast Services
Mobile Terminated-Small Data Transmission (MT-SDT) for NR
Core part: Mobile Terminated-Small Data Transmission (MT-SDT) for NR
Further NR mobility enhancements
Core part: Further NR mobility enhancements
NR NTN (Non-Terrestrial Networks) enhancements
Core part: NR NTN (Non-Terrestrial Networks) enhancements
Core part: Enhancement on NR QoE management and optimizations for diverse services
NR sidelink relay enhancements
Core part: NR sidelink relay enhancements
Core part: NR support for UAV (Uncrewed Aerial Vehicles)
Core part: XR (eXtended Reality) enhancements for NR
Mobile IAB (Integrated Access and Backhaul) for NR
Core part: Mobile IAB (Integrated Access and Backhaul) for NR
Core part: NR network-controlled repeaters
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: NR Timing Resiliency and URLLC enhancements
Core part: Non-Public Networks Phase 2: NG-RAN aspects
Core part: Network Slicing Phase 3: NR aspects
Core part: Enhancements for Artificial Intelligence (AI)/Machine Learning (ML) for NG-RAN
Core part: Data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR standalone and MR-DC (Multi-Radio Dual Connectivity) Phase 4
Core part: 7MHz Channel Bandwidth for n26 and n5
Core part: Low-power wake-up signal and receiver for NR (LP-WUS/WUR)
Core part: NR mobility enhancements Phase 4
Core part: NR sidelink multi-hop relay
Core part: Additional topological enhancements for NR
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
Subscriber and Equipment Trace and QoE collection management
Uncrewed Aerial System Phase 3
Core part: Solutions for Ambient IoT in NR Phase 2
Core part: Artificial Intelligence (AI)/Machine Learning (ML) for NG-RAN Phase 3
Core part: NR mobility enhancements Phase 5
Core part: Data collection for SON/MDT in NR Phase 5
Core part: UE RF enhancements for NR FR1, Phase 5
Core part: XR (eXtended Reality) for NR Phase 4
5G performance measurements/KPIs and Trace/MDT/QoE
(Small) Technical Enhancements and Improvements for Rel-20
NR to LTE mobility restriction
Historical association · verification pending(Small) Technical Enhancements and Improvements for R99
Knowledge graph