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 WIs64
Rel-16 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.
5G_URLLCRel-16 · connected · 100%
Historical association · verification pending3GPP ↗5G_V2X_NRSLRel-16 · connected · 100%
3GPP ↗5G_V2X_NRSL-CoreRel-16 · connected · 100%
3GPP ↗Direct_data_fw_NR-CoreRel-16 · connected · 100%
3GPP ↗FS_NR_IIOTRel-16 · connected · 100%
3GPP ↗LTE_NR_DC_CA_enhRel-16 · connected · 100%
3GPP ↗LTE_NR_DC_CA_enh-CoreRel-16 · connected · 100%
3GPP ↗LTE_NR_arch_evo-CoreRel-16 · connected · 100%
3GPP ↗NB_IOTenh3-CoreRel-16 · connected · 100%
3GPP ↗NG_RAN_PRNRel-16 · connected · 100%
3GPP ↗NG_RAN_PRN-CoreRel-16 · connected · 100%
3GPP ↗NR_CLI_RIMRel-16 · connected · 99%
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-16 context
CR activity across mapped specs
Context only: these CRs target mapped specifications in Rel-16; they are not automatically attributed to the feature.
29.281 · CR 0106
Per QoS Flow per UE QoS monitoring without time synchronisation
postponed29.281 · CR 0107
N19 user plane interface for 5G VN group communication
approved29.281 · CR 0109
Implementing the conclusions of TR 29.892 for GTP-U
approved29.281 · CR 0110
End marker in NG-RAN initiated QoS Flow mobility
revised29.281 · CR 0110 rev.1
End marker in EPS and 5GS
approved29.281 · CR 0112
Implementation error
merged29.281 · CR 0114
End Marker in NG-RAN initiated QoS Flow mobility
revised29.281 · CR 0114 rev.1
End Marker in NG-RAN initiated QoS Flow mobility
approved38.401 · CR 0326
IAB-node authorization
revised38.401 · CR 0326 rev.1
IAB-node authorization
revised38.401 · CR 0024
CR to 38.401 on Integrated Access and Backhaul for NR
merged38.401 · CR 0027
IAB architecture
revised38.401 · CR 0027 rev.1
IAB architecture
merged38.401 · CR 0028
IAB node Integration Procedure
status unknown38.401 · CR 0029
Backhaul Channel Setup and Modification Procedure for IAB Networks
status unknownCandidate 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 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 900moderate evidence
TS 36.423
Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 Application Protocol (X2AP)
R3 · Rel-8inferredrank 700moderate evidence
TS 36.331
Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification
R2 · Rel-8inferredrank 625moderate evidence
TS 23.008
Organization of subscriber data
C4 · Rel-4inferredrank 600moderate evidence
TS 36.413
Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP)
R3 · Rel-8inferredrank 600moderate evidence
TS 38.413
NG-RAN; NG Application Protocol (NGAP)
R3 · Rel-15inferredrank 600moderate evidence
TS 23.003
Numbering, addressing and identification
C4 · Rel-4inferredrank 575moderate evidence
TS 38.423
NG-RAN; Xn Application Protocol (XnAP)
R3 · Rel-15inferredrank 565strong evidence
graph adjacency
interface_specification with mapped TS/TR 38.401
TS 36.133
Evolved Universal Terrestrial Radio Access (E-UTRA); Requirements for support of radio resource management
R4 · Rel-8inferredrank 525moderate evidence
TS 23.401
General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access
S2 · Rel-8inferredrank 500moderate evidence
TS 29.060
General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across the Gn and Gp interface
C4 · Rel-4inferredrank 500moderate evidence
TS 29.272
Evolved Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol
C4 · Rel-8inferredrank 500moderate 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.