Feature lineage › NG-RAN Functional Split Mapped specs 4
Explicit stage labels 0
Inferred orientations 4
Relationships 2
Connected WIs 100
Rel-21 CR context 0
Layer 1
Core-network protocol & service realization 1 spec TS 29.281 General Packet Radio System (GPRS) Tunnelling Protocol User Plane (GTPv1-U)
C4 · Rel-8 inferred Orientation inferred from the 29-series; this is not an official 3GPP stage assignment.
Layer 2
RAN / radio realization 3 specs TS 38.401 NG-RAN; Architecture description
R3 · Rel-15 inferred Orientation inferred from the 38-series; this is not an official 3GPP stage assignment.
TS 38.473 NG-RAN; F1 Application Protocol (F1AP)
R3 · Rel-15 inferred Orientation inferred from the 38-series; this is not an official 3GPP stage assignment.
TS 38.463 NG-RAN; E1 Application Protocol (E1AP)
R3 · Rel-15 inferred Orientation 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-Core Rel-20 · connected · 55%
3GPP ↗ NR_AIML_NGRAN_Ph3-Core Rel-20 · connected · 50%
3GPP ↗ NR_Mob_Ph5 Rel-20 · connected · 26%
3GPP ↗ NR_Mob_Ph5-Core Rel-20 · connected · 55%
3GPP ↗ NR_SON_MDT_Ph5-Core Rel-20 · connected · 75%
3GPP ↗ NR_UE_RF_Ph5-Core Rel-20 · connected · 80%
3GPP ↗ NR_XR_Ph4-Core Rel-20 · connected · 57%
3GPP ↗ PM_KPI_Trace_MDT_QoE-OAM Rel-20 · connected · 100%
3GPP ↗ TEI20 Rel-20 · connected · 0%
3GPP ↗ Ambient_IoT_Solutions-Core Rel-19 · connected · 100%
3GPP ↗ NR_AIML_NGRAN_enh-Core Rel-19 · connected · 100%
3GPP ↗ NR_AIML_air-Core Rel-19 · connected · 100%
3GPP ↗ Cross-spec traceability
Release-valid relationships 38.473interface specification 38.401
curated reviewed
38.463interface specification 38.401
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-21 context
CR activity across mapped specs Context only: these CRs target mapped specifications in Rel-21; they are not automatically attributed to the feature.
No CR activity targeting the mapped specifications is indexed for Rel-21.
Candidate 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.
inferred rank 325 moderate evidence
shared work item Shares Work Item FS_SAE with mapped specifications
evidence ↗ shared work item Shares Work Item TEI8 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI9 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI10 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI11 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI12 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI13 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI14 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI16 with mapped specifications
evidence ↗ shared work item Shares Work Item MINT with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI18 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI19 with mapped specifications
evidence ↗ TS 22.101 Service aspects; Service principles
S1 · Rel-4 inferred rank 325 moderate evidence
shared work item Shares Work Item FS_SAE with mapped specifications
evidence ↗ shared work item Shares Work Item TEI8 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI9 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI10 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI11 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI12 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI13 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI14 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI16 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI18 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI19 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI20 with mapped specifications
evidence ↗ TS 22.173 IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary services; Stage 1
S1 · Rel-7 inferred rank 275 moderate evidence
shared work item Shares Work Item TEI8 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI9 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI10 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI11 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI12 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI13 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI14 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI16 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI19 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI20 with mapped specifications
evidence ↗ TS 22.268 Public Warning System (PWS) requirements
S1 · Rel-9 inferred rank 275 moderate evidence
shared work item Shares Work Item TEI9 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI10 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI11 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI12 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI13 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI14 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI16 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI18 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI19 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI20 with mapped specifications
evidence ↗ TS 22.228 Service requirements for the Internet Protocol (IP) multimedia core network subsystem (IMS); Stage 1
S1 · Rel-5 inferred rank 250 moderate evidence
shared work item Shares Work Item MBMS with mapped specifications
evidence ↗ shared work item Shares Work Item TEI8 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI9 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI10 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI11 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI12 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI13 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI19 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI20 with mapped specifications
evidence ↗ TS 22.280 Mission Critical Services Common Requirements (MCCoRe); Stage 1
S1 · Rel-14 inferred rank 100 moderate evidence
shared work item Shares Work Item TEI16 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI18 with mapped specifications
evidence ↗ shared work item Shares Work Item TEI19 with mapped specifications
evidence ↗ TS 22.179 Mission Critical Push to Talk (MCPTT); Stage 1
S1 · Rel-13 inferred rank 25 moderate evidence
shared work item Shares Work Item TEI17 with mapped specifications
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.