TS 38.413 relationship map
NGAP
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; NG Application Protocol (NGAP)
NGAP
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-18 snapshot
499 indexed Change Requests · 30 connected Work Items.
Showing 0 CR records from the available cross-release sample. Browse release CR records (JSON) →
Version history
Showing 60 of 80 indexed versions.
Atlas classifications
No Atlas classifications have been attached yet.
Work Items
5G System - Phase 1
Historical association · verification pendingSeparation of CP and UP for Split Option 2 of NR
Core part: Separation of CP and UP for Split Option 2 of NR
New Radio Access Technology
Core part: New Radio Access Technology
Cellular IoT support and evolution for the 5G System
Historical association · verification pendingEnhancement 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: NG interface usage for WWC
Direct data forwarding between NG-RAN and E-UTRAN nodes for inter-system mobility
Core part: Direct data forwarding between NG-RAN and E-UTRAN nodes for inter-system mobility
Study on NR Industrial Internet of Things (IoT)
Study on enhancement for disaggregated gNB architecture
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
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: 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
Core part: Single Radio Voice Call Continuity from 5G to 3G
(Small) Technical Enhancements and Improvements for Rel-16
5GS Enhanced support of Vertical and LAN Services
Historical association · verification pendingArchitecture enhancements for 3GPP support of advanced V2X services
Historical association · verification pendingStudy on NR QoE (Quality of Experience) management and optimizations for diverse services
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 pendingAdditional enhancements for NB-IoT and LTE-MTC
Core part: Additional enhancements for NB-IoT and LTE-MTC
Enhancement of Private Network support for NG-RAN
Core part: Enhancement of Private Network support for NG-RAN
NPN support of PWS
Enhancement 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)
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
UE power saving enhancements for NR
Core part: UE power saving enhancements for NR
RAN aspects of 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
Enhancement of Network Slicing Phase 2
Historical association · verification pending5G multicast-broadcast services Phase 2
Support for Wireless and Wireline Convergence Phase 2
Core part: Artificial Intelligence (AI)/Machine Learning (ML) for NG-RAN
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: Enhancements of NR Multicast and Broadcast Services
Core part: Further NR mobility enhancements
NR NTN (Non-Terrestrial Networks) enhancements
Core part: NR NTN (Non-Terrestrial Networks) enhancements
Enhancement on NR QoE management and optimizations for diverse services
Core part: Enhancement on NR QoE management and optimizations for diverse services
NR sidelink relay enhancements
Core part: NR sidelink relay enhancements
NR support for UAV (Uncrewed Aerial Vehicles)
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
NR network-controlled repeaters
Core part: NR network-controlled repeaters
Core part: Expanded and improved NR positioning
Enhanced support of reduced capability NR devices
Core part: Enhanced support of reduced capability NR devices
Core part: Network energy savings for NR
(Small) Technical Enhancements and Improvements for Rel-18
NR Timing Resiliency and URLLC enhancements
Core part: NR Timing Resiliency and URLLC enhancements
Core part: Non-Public Networks Phase 2: NG-RAN aspects
Network Slicing Phase 3
Historical association · verification pendingCore part: Network Slicing Phase 3: NR aspects
Core part: Solutions for Ambient IoT (Internet of Things) in NR
Core part: Enhancements for Artificial Intelligence (AI)/Machine Learning (ML) for NG-RAN
Core part: Artificial Intelligence (AI)/Machine Learning (ML) for NR air interface
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: Low-power wake-up signal and receiver for NR (LP-WUS/WUR)
Core part: Non-Terrestrial Networks (NTN) for NR Phase 3
Core part: NR sidelink multi-hop relay
Core part: Additional topological enhancements for NR
Core part: XR (eXtended Reality) for NR Phase 3
(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
Study on Energy Efficiency and Energy Saving Phase2
Core part: Data collection for SON/MDT in NR 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