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-20 CR context7
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.
NR_AIML_air_Ph2Rel-20 · connected · 32%
3GPP ↗NR_AIML_air_Ph2-CoreRel-20 · connected · 67%
3GPP ↗NR_Mob_Ph5Rel-20 · connected · 26%
3GPP ↗TEI20Rel-20 · connected · 0%
3GPP ↗AIML_CNRel-19 · connected · 100%
3GPP ↗AIML_CNRel-19 · connected · 100%
3GPP ↗HPUE_NR_FR1_bands_R19-CoreRel-19 · connected · 100%
3GPP ↗LCS_BDS_B2b_LTE_NRRel-19 · connected · 100%
3GPP ↗LCS_BDS_B2b_LTE_NR-CoreRel-19 · connected · 100%
3GPP ↗LCS_NAVIC_L1_SPS_NR_LTE-CoreRel-19 · connected · 100%
3GPP ↗NR_AIML_airRel-19 · connected · 89%
3GPP ↗NR_AIML_air-CoreRel-19 · 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-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.
38.331 · CR 5802
Failure handling correction and Cell Reselection Priorities
revised38.331 · CR 5802 rev.1
Failure handling correction and Cell Reselection Priorities [Freq_Prio_Handling]
endorsed38.331 · CR 5867
Introduction of LTM SCell activation improvement and dynamic L1 measurement and reporting configuration change
revised38.331 · CR 5867 rev.1
Introduction of LTM SCell activation improvement and dynamic L1 measurement and reporting configuration change
status unknown38.331 · CR 5881
Introduction of efficient on-demand posSIB request for RRC [effOdPosSIB]
status unknown38.331 · CR 5888
Correction on TS 38.331: Introducing predictable coverage assistance information for NR NTN
status unknown38.455 · CR 0232
Addition of Time of Arrival (ToA) measurement in E-CID
status unknownCandidate 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 2550moderate evidence
shared work item
Shares Work Item NR_FR1_lessthan_5MHz_BW_Ph2-Core with mapped specifications
evidence ↗shared work item
Shares Work Item NonCol_intraB_ENDC_NR_CA_Ph2-Core with mapped specifications
evidence ↗TS 38.101-1
NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone
R4 · Rel-15inferredrank 1800moderate evidence
shared work item
Shares Work Item NR_SAR_PC2_interB_SUL_2BUL-Core with mapped specifications
evidence ↗shared work item
Shares Work Item 4Rx_low_NR_band_handheld_3Tx_NR_CA_ENDC with mapped specifications
evidence ↗shared work item
Shares Work Item 4Rx_low_NR_band_handheld_3Tx_NR_CA_ENDC-Core with mapped specifications
evidence ↗shared work item
Shares Work Item NR_FR1_lessthan_5MHz_BW_Ph2-Core with mapped specifications
evidence ↗shared work item
Shares Work Item NonCol_intraB_ENDC_NR_CA_Ph2-Core with mapped specifications
evidence ↗TS 23.501
System architecture for the 5G System (5GS)
S2 · Rel-15inferredrank 1050moderate evidence
TS 23.502
Procedures for the 5G System (5GS)
S2 · Rel-15inferredrank 950moderate evidence
TS 38.101-3
NR; User Equipment (UE) radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios
R4 · Rel-15inferredrank 875moderate evidence
shared work item
Shares Work Item NR_SAR_PC2_interB_SUL_2BUL-Core with mapped specifications
evidence ↗shared work item
Shares Work Item 4Rx_low_NR_band_handheld_3Tx_NR_CA_ENDC with mapped specifications
evidence ↗shared work item
Shares Work Item 4Rx_low_NR_band_handheld_3Tx_NR_CA_ENDC-Core with mapped specifications
evidence ↗shared work item
Shares Work Item NonCol_intraB_ENDC_NR_CA_Ph2-Core with mapped specifications
evidence ↗TS 38.307
NR; Requirements on User Equipments (UEs) supporting a release-independent frequency band
R4 · Rel-15inferredrank 775moderate evidence
shared work item
Shares Work Item 4Rx_low_NR_band_handheld_3Tx_NR_CA_ENDC-Core with mapped specifications
evidence ↗TS 38.101-2
NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone
R4 · Rel-15inferredrank 750moderate evidence
TS 29.518
5G System; Access and Mobility Management Services; Stage 3
C4 · Rel-15inferredrank 675moderate evidence
TS 38.104
NR; Base Station (BS) radio transmission and reception
R4 · Rel-15inferredrank 675moderate evidence
shared work item
Shares Work Item NR_FR1_lessthan_5MHz_BW_Ph2-Core with mapped specifications
evidence ↗TS 24.501
Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3
C1 · Rel-15inferredrank 650moderate evidence
TS 29.503
5G System; Unified Data Management Services; Stage 3
C4 · Rel-15inferredrank 500moderate evidence
TS 29.571
5G System; Common Data Types for Service Based Interfaces; Stage 3
C4 · Rel-15inferredrank 425moderate 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.