Feature lineage › Non-Terrestrial Networks Mapped specs 6
Explicit stage labels 0
Inferred orientations 6
Relationships 6
Connected WIs 100
Rel-21 CR context 0
Layer 1
System architecture & procedures / Stage 2 orientation 2 specs TS 23.501 System architecture for the 5G System (5GS)
S2 · Rel-15 inferred Orientation inferred from the 23-series; this is not an official 3GPP stage assignment.
TS 23.502 Procedures for the 5G System (5GS)
S2 · Rel-15 inferred Orientation inferred from the 23-series; this is not an official 3GPP stage assignment.
Layer 2
RAN / radio realization 4 specs TS 38.300 NR; NR and NG-RAN Overall description; Stage-2
R2 · Rel-15 inferred Orientation 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-15 inferred Orientation inferred from the 38-series; this is not an official 3GPP stage assignment.
TS 38.104 NR; Base Station (BS) radio transmission and reception
R4 · Rel-15 inferred Orientation inferred from the 38-series; this is not an official 3GPP stage assignment.
TS 38.321 NR; Medium Access Control (MAC) protocol specification
R2 · Rel-15 inferred Orientation inferred from the 38-series; this is not an official 3GPP stage assignment.
Primary feature evidence
Topic source Work Item NR_NTN_solutions Solutions for NR to support non-terrestrial networks (NTN)
Rel-17 · PCG approved · WG not indexed · Work Plan 100% 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_Ph4 Rel-20 · connected · 69%
3GPP ↗ 5GSAT_Ph4-ARC Rel-20 · connected · 100%
3GPP ↗ AIML_CN_Ph2-ARC Rel-20 · connected · 100%
3GPP ↗ AdNRM_Ph4-OAM Rel-20 · connected · 90%
3GPP ↗ AmbientIoT_Ph2-ARC Rel-20 · connected · 95%
3GPP ↗ CPAS-CT Rel-20 · connected · 90%
3GPP ↗ EnergySys_Ph2-ARC Rel-20 · connected · 100%
3GPP ↗ FS_EnergySys_Ph2 Rel-20 · connected · 100%
3GPP ↗ NG_RTC_Ph3-ARC Rel-20 · connected · 99%
3GPP ↗ NR_1500MHz_JP Rel-20 · connected · 100%
3GPP ↗ NR_1500MHz_JP-Core Rel-20 · connected · 100%
3GPP ↗ NR_40GHz_EESSprot_PC1-Core Rel-20 · connected · 100%
3GPP ↗ Cross-spec traceability
Release-valid relationships 23.502stage realization of 23.501
curated reviewed
38.331procedure component 38.300
curated reviewed
38.331radio procedure component 23.502
38.300ntn access context for 23.501
38.331ntn radio control for 23.501
38.321ntn mac realization of 38.300
Primary WI evolution
Change Requests linked to the primary Work Item 23.501 · CR 5495 rev.1 Access restrictions for satellite access in the context of 5GC-EPC interworking
Rel-19 · approved 3GPP CR ↗ 23.501 · CR 5495 Access restrictions for satellite access in the context of 5GC-EPC interworking
Rel-19 · revised 38.101-5 · CR 0179 R19 CR for 38.101-5 to modify the REFSENs Table 7.3.2-1
Rel-19 · postponed 38.331 · CR 5366 rev.5 Corrections on eventD1/D2 and condEventD1/D2/T1
Rel-18 · approved 3GPP CR ↗ 38.181 · CR 0060 (NR_NTN_solutions) Correction of reference to Suspended version of ITU-R SM.329 Recommendation
Rel-18 · approved 3GPP CR ↗ 38.141-2 · CR 0621 (NR_NTN_solutions)CR for TS38.141-2: Adding HAPS abbreviation and definition of HAPS BS class for conformance requirements
Rel-18 · approved 3GPP CR ↗ 38.141-1 · CR 0487 (NR_NTN_solutions)CR for TS38.141-1: Adding HAPS abbreviation and definition of HAPS BS class for conformance requirements
Rel-18 · approved 3GPP CR ↗ 23.501 · CR 5494 rev.2 Access restrictions for satellite access in the context of 5GC-EPC interworking
Rel-18 · approved 3GPP CR ↗ 38.331 · CR 4962 Clarification on parallel lists in MeasObjectNR
Rel-18 · approved 3GPP CR ↗ 38.101-5 · CR 0078 rev.1 Clarification for applicability of DSS for NTN FR1 bands
Rel-18 · approved 3GPP CR ↗ 38.214 · CR 0594 Rel-17 editorial corrections for TS 38.214 – mirror to Rel-18
Rel-18 · approved 3GPP CR ↗ 38.108 · CR 0058 Clarification for applicability of DSS for NTN FR1 bands
Rel-18 · approved 3GPP CR ↗ 38.101-5 · CR 0052 Clarification for the Pi/2 BPSK modulation
Rel-18 · approved 3GPP CR ↗ 38.101-5 · CR 0035 rev.1 Clarifications to 38.101-5 (Rel-18)
Rel-18 · approved 3GPP CR ↗ 38.133 · CR 3598 [NR_NTN_Solutions] CR 38.133 (Cat. A) on Time and Location Based Measurement Initiation
Rel-18 · approved 3GPP CR ↗ 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.
TS 22.101 Service aspects; Service principles
S1 · Rel-4 inferred rank 200 moderate evidence
shared work item Shares Work Item DUMMY with mapped specifications
evidence ↗ shared work item Shares Work Item TEI16 with mapped specifications
evidence ↗ shared work item Shares Work Item MUSIM with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ shared work item Shares Work Item eNPN 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 22.268 Public Warning System (PWS) requirements
S1 · Rel-9 inferred rank 175 moderate evidence
shared work item Shares Work Item DUMMY 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 IoT_NTN_Ph3-Core with mapped specifications
evidence ↗ shared work item Shares Work Item TEI20 with mapped specifications
evidence ↗ inferred rank 150 moderate evidence
shared work item Shares Work Item DUMMY 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 22.173 IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary services; Stage 1
S1 · Rel-7 inferred rank 125 moderate evidence
shared work item Shares Work Item DUMMY 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 22.280 Mission Critical Services Common Requirements (MCCoRe); Stage 1
S1 · Rel-14 inferred rank 125 moderate evidence
shared work item Shares Work Item DUMMY 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 ↗ TS 22.228 Service requirements for the Internet Protocol (IP) multimedia core network subsystem (IMS); Stage 1
S1 · Rel-5 inferred rank 75 moderate 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 22.179 Mission Critical Push to Talk (MCPTT); Stage 1
S1 · Rel-13 inferred rank 50 moderate evidence
shared work item Shares Work Item DUMMY with mapped specifications
evidence ↗ shared work item Shares Work Item TEI17 with mapped specifications
evidence ↗ TS 22.137 Integrated Sensing and Communication
S1 · Rel-19 inferred rank 25 moderate evidence
shared work item Shares Work Item DUMMY 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.