Layer 1
Core-network protocol & service realization
TS 29.281
General Packet Radio System (GPRS) Tunnelling Protocol User Plane (GTPv1-U)
C4 · Rel-8inferredOrientation inferred from the 29-series; this is not an official 3GPP stage assignment.
curatedreviewedreviewed from Rel-15
Feature lineage · NG-RAN Functional Split
gNB-CU-CP, gNB-CU-UP and gNB-DU architecture with F1 and E1 control relationships.
Mapped specs4
Explicit stage labels0
Inferred orientations4
Relationships2
Connected WIs100
Rel-17 CR context50
1 spec
Layer 2
RAN / radio realization
TS 38.401
NG-RAN; Architecture description
R3 · Rel-15inferredOrientation inferred from the 38-series; this is not an official 3GPP stage assignment.
TS 38.473
NG-RAN; F1 Application Protocol (F1AP)
R3 · Rel-15inferredOrientation inferred from the 38-series; this is not an official 3GPP stage assignment.
TS 38.463
NG-RAN; E1 Application Protocol (E1AP)
R3 · Rel-15inferredOrientation inferred from the 38-series; this is not an official 3GPP stage assignment.
Primary feature evidence
Topic source Work Item
The reviewed topic source is not an indexed Work Item record. The source link above remains the primary evidence anchor.
Connected work
Work Items touching mapped specs
These Work Items share one or more mapped specifications. Atlas does not automatically claim that every connected Work Item defines this feature.
5MBSRel-17 · connected · 100%
Historical association · verification pending3GPP ↗EGTPURRel-17 · connected · 100%
3GPP ↗LTE_NR_DC_enh2-CoreRel-17 · connected · 100%
3GPP ↗LTE_NR_MUSIMRel-17 · connected · 100%
3GPP ↗LTE_NR_MUSIM-CoreRel-17 · connected · 100%
3GPP ↗LTE_NR_arch_evo_enhRel-17 · connected · 100%
3GPP ↗LTE_NR_arch_evo_enh-CoreRel-17 · connected · 100%
3GPP ↗MINTRel-17 · connected · 100%
Historical association · verification pending3GPP ↗NG_RAN_PRN_enhRel-17 · connected · 100%
3GPP ↗NG_RAN_PRN_enh-CoreRel-17 · connected · 100%
3GPP ↗NR_ENDC_SON_MDT_enhRel-17 · connected · 100%
3GPP ↗NR_ENDC_SON_MDT_enh-CoreRel-17 · connected · 100%
3GPP ↗Cross-spec traceability
Release-valid relationships
38.473interface specification38.401curatedreviewed
38.463interface specification38.401curatedreviewedevidence ↗
Primary WI evolution
Change Requests linked to the primary Work Item
No indexed CRs are linked to the primary Work Item at or before this release.
Rel-17 context
CR activity across mapped specs
Context only: these CRs target mapped specifications in Rel-17; they are not automatically attributed to the feature.
29.281 · CR 0132
Fixing the GTP-U Tunnel Status Information and Recovery Time Stamp IEs
approved29.281 · CR 0111
Tunnel Status notifying Pause of Charging
revised29.281 · CR 0111 rev.1
Tunnel Status notifying Pause of Charging
approved29.281 · CR 0111 rev.2
Tunnel Status notifying Pause of Charging
withdrawn29.281 · CR 0113
Use of Inclusive Language
withdrawn29.281 · CR 0116
Detecting of the restart of a GTP-U entity
revised29.281 · CR 0116 rev.1
Detecting of the restart of a GTP-U entity
approved29.281 · CR 0117
PDU Session Container used over N3mb and N19mb
approved29.281 · CR 0118
MBS QFI Sequence Number
withdrawn29.281 · CR 0119
A G-PDU message without a T-PDU
approved29.281 · CR 0120
MBS data forwarding
revised29.281 · CR 0120 rev.1
MB-UPF
approved29.281 · CR 0121
Adding MBSTF and AF as a GTP-U entities
withdrawn38.401 · CR 0197
Support of UDC in NR
status unknown38.401 · CR 0261 rev.2
Correction on Multicast Session Establishment
revisedCandidate expansion · review required
Specifications Atlas may be missing from this topic
Inferred only. These records are not part of the reviewed semantic catalogue. The ranking score orders structural evidence; it is not a probability or confidence value, and there is no automatic promotion action.
TS 38.423
NG-RAN; Xn Application Protocol (XnAP)
R3 · Rel-15inferredrank 1265strong evidence
graph adjacency
interface_specification with mapped TS/TR 38.401
TS 38.300
NR; NR and NG-RAN Overall description; Stage-2
R2 · Rel-15inferredrank 1200moderate evidence
TS 38.413
NG-RAN; NG Application Protocol (NGAP)
R3 · Rel-15inferredrank 1200moderate evidence
TS 38.331
NR; Radio Resource Control (RRC); Protocol specification
R2 · Rel-15inferredrank 1175moderate evidence
TS 38.306
NR; User Equipment (UE) radio access capabilities
R2 · Rel-15inferredrank 1075moderate evidence
TS 29.274
3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3
C4 · Rel-8inferredrank 975moderate evidence
TS 36.331
Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification
R2 · Rel-8inferredrank 950moderate evidence
TS 38.133
NR; Requirements for support of radio resource management
R4 · Rel-15inferredrank 950moderate evidence
TS 36.423
Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 Application Protocol (X2AP)
R3 · Rel-8inferredrank 850moderate evidence
TS 36.413
Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP)
R3 · Rel-8inferredrank 800moderate evidence
TS 38.321
NR; Medium Access Control (MAC) protocol specification
R2 · Rel-15inferredrank 800moderate evidence
TS 38.470
NG-RAN; F1 general aspects and principles
R3 · Rel-15inferredrank 775moderate evidence
Traceability limits
What this lineage is not claiming
- The reviewed topic-to-specification mapping is Atlas-curated and non-normative even when its source is an official 3GPP record.
- When an explicit stage classification is unavailable, specification layers are inferred from the TS/TR series and are labelled inferred rather than presented as official 3GPP stage assignments.
- Connected Work Items and release-context Change Requests share mapped specifications; only the topic source Work Item is treated as primary evidence for the reviewed topic mapping.
- This is traceability evidence and navigation, not a clause-by-clause normative feature definition.