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 WIs68
Rel-16 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.
5G_CIoTRel-16 · connected · 100%
Historical association · verification pending3GPP ↗5G_V2X_NRSLRel-16 · connected · 100%
3GPP ↗5G_V2X_NRSL-CoreRel-16 · connected · 100%
3GPP ↗5G_eLCSRel-16 · connected · 100%
3GPP ↗5G_eLCSRel-16 · connected · 100%
3GPP ↗ENDC_UE_PC2_FDD_TDD-CoreRel-16 · connected · 100%
3GPP ↗ENDC_UE_PC2_TDD_TDDRel-16 · connected · 100%
3GPP ↗E_FLUSRel-16 · connected · 95%
3GPP ↗FS_5G_evalRel-16 · connected · 100%
3GPP ↗FS_LTE_NR_data_collectRel-16 · connected · 100%
3GPP ↗FS_NR_UE_pow_savRel-16 · connected · 100%
3GPP ↗FS_NR_posRel-16 · connected · 100%
3GPP ↗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-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.
23.273 · CR 0292
AMF instead of LMF for NI and HO
revised23.273 · CR 0292 rev.1
AMF instead of LMF for NI and HO
approved23.273 · CR 0560 rev.2
The deferred 5GC-MT-LR procedure correction
approved23.273 · CR 0560 rev.3
The deferred 5GC-MT-LR procedure correction
withdrawn23.273 · CR 0001
Correction on UE Assisted and UE Based Positioning Procedure
revised23.273 · CR 0001 rev.1
Correction on UE Assisted and UE Based Positioning Procedure
approved23.273 · CR 0002
Correction on LCS privacy selection flow rule
revised23.273 · CR 0002 rev.1
Correction on LCS privacy selection flow rule
approved23.273 · CR 0003
Corrections to EPC Interconnection
approved23.273 · CR 0004
Assistance Data Broadcast procedure using MO-LR
noted23.273 · CR 0005
Corrections to LCS Privacy feature
revised23.273 · CR 0005 rev.1
Corrections to LCS Privacy feature
approved23.273 · CR 0006 rev.1
Support of Concurrent Location Request
revised23.273 · CR 0006 rev.2
Support of Concurrent Location Request
revised23.273 · CR 0006 rev.3
Support of Concurrent Location Request
approvedCandidate 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 1075moderate evidence
TS 38.300
NR; NR and NG-RAN Overall description; Stage-2
R2 · Rel-15inferredrank 765strong evidence
graph adjacency
procedure_component with mapped TS/TR 38.331
TS 36.331
Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification
R2 · Rel-8inferredrank 750moderate evidence
TS 38.133
NR; Requirements for support of radio resource management
R4 · Rel-15inferredrank 750moderate evidence
TS 36.133
Evolved Universal Terrestrial Radio Access (E-UTRA); Requirements for support of radio resource management
R4 · Rel-8inferredrank 550moderate evidence
TS 36.306
Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio access capabilities
R2 · Rel-8inferredrank 550moderate evidence
TS 38.321
NR; Medium Access Control (MAC) protocol specification
R2 · Rel-15inferredrank 525moderate evidence
TS 38.423
NG-RAN; Xn Application Protocol (XnAP)
R3 · Rel-15inferredrank 525moderate evidence
TS 36.423
Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 Application Protocol (X2AP)
R3 · Rel-8inferredrank 500moderate evidence
TS 38.413
NG-RAN; NG Application Protocol (NGAP)
R3 · Rel-15inferredrank 475moderate evidence
TS 38.473
NG-RAN; F1 Application Protocol (F1AP)
R3 · Rel-15inferredrank 475moderate evidence
TS 36.300
Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2
R2 · Rel-8inferredrank 450moderate 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.