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-20 CR context38
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.
Ambient_IoT_Solutions_Ph2-CoreRel-20 · connected · 55%
3GPP ↗NR_AIML_NGRAN_Ph3-CoreRel-20 · connected · 50%
3GPP ↗NR_Mob_Ph5Rel-20 · connected · 26%
3GPP ↗NR_Mob_Ph5-CoreRel-20 · connected · 55%
3GPP ↗NR_SON_MDT_Ph5-CoreRel-20 · connected · 75%
3GPP ↗NR_UE_RF_Ph5-CoreRel-20 · connected · 80%
3GPP ↗NR_XR_Ph4-CoreRel-20 · connected · 57%
3GPP ↗PM_KPI_Trace_MDT_QoE-OAMRel-20 · connected · 100%
3GPP ↗TEI20Rel-20 · connected · 0%
3GPP ↗Ambient_IoT_Solutions-CoreRel-19 · connected · 100%
3GPP ↗NR_AIML_NGRAN_enh-CoreRel-19 · connected · 100%
3GPP ↗NR_AIML_air-CoreRel-19 · 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-20 context
CR activity across mapped specs
Context only: these CRs target mapped specifications in Rel-20; they are not automatically attributed to the feature.
38.401 · CR 0534
(BLCR for 38.401) Introduction of SON enhancements
revised38.401 · CR 0534 rev.1
(BLCR for 38.401) Introduction of SON enhancements
revised38.401 · CR 0534 rev.2
(BLCR for 38.401) Introduction of SON enhancements
revised38.401 · CR 0534 rev.4
(BLCR for 38.401) Introduction of SON enhancements
revised38.401 · CR 0534 rev.5
(BLCR for 38.401) Introduction of SON enhancements
revised38.401 · CR 0534 rev.6
(BLCR for 38.401) Introduction of SON enhancements
status unknown38.401 · CR 0542
(BL for 38.401 BL CR) Introduction of Ambient IoT Ph2
revised38.401 · CR 0542 rev.1
(BLCR for 38.401) Introduction of Ambient IoT Ph2
revised38.401 · CR 0542 rev.2
(BLCR for 38.401) Introduction of Ambient IoT Ph2
status unknown38.401 · CR 0543
(BLCR for 38.401) Introduction of NR mobility enhancements Ph5
revised38.401 · CR 0543 rev.1
(BLCR for 38.401) Introduction of NR mobility enhancements Ph5
revised38.401 · CR 0543 rev.2
(BLCR for 38.401) Introduction of NR mobility enhancements Ph5
revised38.401 · CR 0543 rev.3
(BLCR for 38.401) Introduction of NR mobility enhancements Ph5
status unknown38.401 · CR 0534 rev.3
(BLCR for 38.401) Introduction of SON enhancements
revised38.473 · CR 1703 rev.4
(BLCR for 38.473) Introduction of SON enhancements
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 38.133
NR; Requirements for support of radio resource management
R4 · Rel-15inferredrank 1475moderate 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 1025moderate evidence
TS 23.501
System architecture for the 5G System (5GS)
S2 · Rel-15inferredrank 800moderate evidence
TS 23.502
Procedures for the 5G System (5GS)
S2 · Rel-15inferredrank 775moderate evidence
TS 38.101-1
NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone
R4 · Rel-15inferredrank 725moderate evidence
TS 23.003
Numbering, addressing and identification
C4 · Rel-4inferredrank 700moderate evidence
TS 23.401
General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access
S2 · Rel-8inferredrank 575moderate evidence
TS 29.303
Domain Name System Procedures; Stage 3
C4 · Rel-8inferredrank 575moderate evidence
TS 27.007
AT command set for User Equipment (UE)
C1 · Rel-4inferredrank 550moderate evidence
TS 29.061
Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN)
C3 · Rel-4inferredrank 550moderate evidence
TS 23.122
Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode
C1 · Rel-4inferredrank 525moderate evidence
TS 24.301
Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3
C1 · Rel-8inferredrank 525moderate 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.