Layer 1
System architecture & procedures / Stage 2 orientation
TS 23.273
5G System (5GS) Location Services (LCS); Stage 2
S2 · Rel-16inferredOrientation inferred from the 23-series; this is not an official 3GPP stage assignment.
curatedreviewedreviewed from Rel-16
Feature lineage · Positioning
Location services, LPP and NR positioning protocol relationships.
Mapped specs4
Explicit stage labels0
Inferred orientations4
Relationships2
Connected WIs100
Rel-17 CR context50
1 spec
Layer 2
RAN / radio realization
TS 37.355
LTE Positioning Protocol (LPP)
R2 · Rel-15inferredOrientation inferred from the 37-series; this is not an official 3GPP stage assignment.
TS 38.455
NG-RAN; NR Positioning Protocol A (NRPPa)
R3 · Rel-15inferredOrientation inferred from the 38-series; this is not an official 3GPP stage assignment.
TS 38.331
NR; Radio Resource Control (RRC); Protocol specification
R2 · 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.
5GSAT_ARCHRel-17 · connected · 100%
Historical association · verification pending3GPP ↗5G_eLCS_ph2Rel-17 · connected · 100%
3GPP ↗DSS_LTE_B38_NR_Bn38-CoreRel-17 · connected · 100%
3GPP ↗DSS_LTE_B40_NR_Bn40Rel-17 · connected · 100%
3GPP ↗HPUE_PC1_5_n77_n78Rel-17 · connected · 100%
3GPP ↗HPUE_PC1_5_n77_n78-CoreRel-17 · connected · 100%
3GPP ↗ID_UASRel-17 · connected · 100%
3GPP ↗LTE_NBIOT_eMTC_NTNRel-17 · connected · 100%
3GPP ↗LTE_NR_DC_enh2Rel-17 · connected · 100%
3GPP ↗LTE_NR_DC_enh2-CoreRel-17 · connected · 100%
3GPP ↗LTE_NR_MUSIM-CoreRel-17 · connected · 100%
3GPP ↗MINTRel-17 · connected · 100%
Historical association · verification pending3GPP ↗Cross-spec traceability
Release-valid relationships
38.455positioning signalling for23.273curatedreviewedevidence ↗
37.355positioning protocol for23.273curatedreviewedevidence ↗
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.
23.273 · CR 0256
Update of GNSS integrity requirement provisioing
postponed23.273 · CR 0510
Update GMLC local coordinate functionality
approved23.273 · CR 0564
Clarification on the usage of reliable indication
revised23.273 · CR 0564 rev.1
Clarification on the usage of reliable indication
revised23.273 · CR 0006
Support of Concurrent Location Request
revised23.273 · CR 0048
5G_eLCS Removal of the EN on the location information in Clause 5.3.1
revised23.273 · CR 0048 rev.1
5G_eLCS Removal of the EN on the location information in Clause 5.3.1
revised23.273 · CR 0137
Support of LCS service continuity between EPS and 5GS interworking
noted23.273 · CR 0138
Update of MT-LR procedure
noted23.273 · CR 0139
5GC-MO-LR Procedures for Periodic Location report to UE
noted23.273 · CR 0144
Location estimate in Local Coordinates
revised23.273 · CR 0144 rev.1
Location estimate in Local Coordinates
approved23.273 · CR 0145
Add MO-LR subscribed Assistance Data
approved23.273 · CR 0146
Clarification on requesting current location from AMF.
approved23.273 · CR 0147
Add time of position determination to Deferred MT-LR periodic
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 38.306
NR; User Equipment (UE) radio access capabilities
R2 · Rel-15inferredrank 2300moderate evidence
shared work item
Shares Work Item NR_SAR_PC2_interB_SUL_2BUL-Core with mapped specifications
evidence ↗TS 38.300
NR; NR and NG-RAN Overall description; Stage-2
R2 · Rel-15inferredrank 1590strong evidence
graph adjacency
procedure_component with mapped TS/TR 38.331
TS 38.133
NR; Requirements for support of radio resource management
R4 · Rel-15inferredrank 1425moderate evidence
TS 38.473
NG-RAN; F1 Application Protocol (F1AP)
R3 · Rel-15inferredrank 1150moderate evidence
TS 36.331
Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification
R2 · Rel-8inferredrank 1125moderate evidence
TS 38.321
NR; Medium Access Control (MAC) protocol specification
R2 · Rel-15inferredrank 1075moderate evidence
TS 38.423
NG-RAN; Xn Application Protocol (XnAP)
R3 · Rel-15inferredrank 1025moderate evidence
TS 38.101-1
NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone
R4 · Rel-15inferredrank 900moderate evidence
shared work item
Shares Work Item NR_SAR_PC2_interB_SUL_2BUL-Core with mapped specifications
evidence ↗TS 38.214
NR; Physical layer procedures for data
R1 · Rel-15inferredrank 875moderate evidence
TS 38.413
NG-RAN; NG Application Protocol (NGAP)
R3 · Rel-15inferredrank 875moderate evidence
TS 38.213
NR; Physical layer procedures for control
R1 · Rel-15inferredrank 775moderate evidence
TS 36.133
Evolved Universal Terrestrial Radio Access (E-UTRA); Requirements for support of radio resource management
R4 · Rel-8inferredrank 725moderate 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.