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 WIs39
Rel-15 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.
5GS_Ph1Rel-15 · connected · 97%
Historical association · verification pending3GPP ↗5GS_Ph1-CTRel-15 · connected · 100%
3GPP ↗NR_CPUP_SplitRel-15 · connected · 100%
3GPP ↗NR_CPUP_Split-CoreRel-15 · connected · 100%
3GPP ↗NR_newRATRel-15 · connected · 100%
3GPP ↗NR_newRAT-CoreRel-15 · connected · 100%
3GPP ↗SCAS_PGWRel-15 · connected · 100%
3GPP ↗TEI14Rel-14 · connected · 100%
3GPP ↗HLcom-CTRel-13 · connected · 100%
3GPP ↗LTE_CA_enh_b5C-CoreRel-13 · connected · 100%
3GPP ↗TEI13Rel-13 · connected · 100%
3GPP ↗voE_UTRAN_PPD-CTRel-13 · 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-15 context
CR activity across mapped specs
Context only: these CRs target mapped specifications in Rel-15; they are not automatically attributed to the feature.
29.281 · CR 0083 rev.1
GTP-U Extension Header Handling
approved29.281 · CR 0084
Supports N3, N9 and Xn userplane interface
revised29.281 · CR 0084 rev.1
Supports N3, N9 and Xn userplane interface
approved29.281 · CR 0085
End Marker per QoS Flow
postponed29.281 · CR 0085 rev.1
End Marker per QoS Flow
withdrawn29.281 · CR 0086
New GTP-U extension header for 5GS
revised29.281 · CR 0086 rev.1
New GTP-U extension header for 5GS
approved29.281 · CR 0087
Support End Marker in 5GS
revised29.281 · CR 0087 rev.1
Support End Marker in 5GS
approved29.281 · CR 0087 rev.2
Support End Marker in 5GS
withdrawn29.281 · CR 0088
Unpredictability of GTP TEID for PGW GTP-U
revised29.281 · CR 0088 rev.1
Unpredictability of GTP TEID for PGW GTP-U
approved29.281 · CR 0089
New GTP-U Extension Header for the 5GS Container
revised29.281 · CR 0089 rev.1
New GTP-U Extension Header for the 5GS Container
approved29.281 · CR 0092
Change of Comprehension for ‘Long PDCP PDU Number’ extension header
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 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 775moderate evidence
TS 23.008
Organization of subscriber data
C4 · Rel-4inferredrank 575moderate evidence
TS 23.003
Numbering, addressing and identification
C4 · Rel-4inferredrank 525moderate evidence
TS 29.060
General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across the Gn and Gp interface
C4 · Rel-4inferredrank 475moderate evidence
TS 23.007
Restoration procedures
C4 · Rel-4inferredrank 450moderate 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 450moderate evidence
TS 29.273
Evolved Packet System (EPS); 3GPP EPS AAA interfaces
C4 · Rel-8inferredrank 450moderate evidence
TS 29.230
Diameter applications; 3GPP specific codes and identifiers
C4 · Rel-6inferredrank 425moderate evidence
TS 29.303
Domain Name System Procedures; Stage 3
C4 · Rel-8inferredrank 425moderate evidence
TS 23.401
General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access
S2 · Rel-8inferredrank 400moderate evidence
TS 24.301
Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3
C1 · Rel-8inferredrank 400moderate evidence
TS 29.061
Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN)
C3 · Rel-4inferredrank 400moderate 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.