Layer 1
Requirements / Stage 1 orientation
TS 22.261
Service requirements for the 5G system
S1 · Rel-15inferredOrientation inferred from the 22-series; this is not an official 3GPP stage assignment.
curatedreviewedreviewed from Rel-18
Feature lineage · XR / Immersive Media
Extended-reality service requirements, media and QoS context.
Mapped specs4
Explicit stage labels0
Inferred orientations4
Relationships2
Connected WIs100
Rel-18 CR context50
1 spec
Layer 2
System architecture & procedures / Stage 2 orientation
TS 23.501
System architecture for the 5G System (5GS)
S2 · Rel-15inferredOrientation inferred from the 23-series; this is not an official 3GPP stage assignment.
TS 23.503
Policy and charging control framework for the 5G System (5GS); Stage 2
S2 · Rel-15inferredOrientation inferred from the 23-series; this is not an official 3GPP stage assignment.
Layer 3
Media
TS 26.114
IP Multimedia Subsystem (IMS); Multimedia Telephony; Media handling and interaction
S4 · Rel-7inferredOrientation inferred from the 26-series; this is not an official 3GPP stage assignment.
Primary feature evidence
Topic source Work Item
XRM
Architecture Enhancements for XR (Extended Reality) and media service
Rel-18 · 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.
5GSATBRel-18 · connected · 100%
3GPP ↗5GSATBRel-18 · connected · 100%
Historical association · verification pending3GPP ↗5GSAT_Ph2Rel-18 · connected · 100%
3GPP ↗5G_ProSe_Ph2Rel-18 · connected · 100%
3GPP ↗5G_eLCS_Ph3Rel-18 · connected · 100%
3GPP ↗5MBS_Ph2Rel-18 · connected · 100%
3GPP ↗5TRSRel-18 · connected · 100%
3GPP ↗5WWC_Ph2Rel-18 · connected · 100%
3GPP ↗5WWC_Ph2Rel-18 · connected · 100%
3GPP ↗AIML_MTRel-18 · connected · 100%
3GPP ↗AIMLsysRel-18 · connected · 100%
3GPP ↗AMPRel-18 · connected · 100%
3GPP ↗Cross-spec traceability
Release-valid relationships
23.503policy for23.501curatedreviewed
23.501stage realization of22.261curatedreviewedevidence ↗
Primary WI evolution
Change Requests linked to the primary Work Item
29.514 · CR 0817 rev.1
Corrections to the QosMonitoringReport data type
Rel-18 · approved3GPP CR ↗29.281 · CR 0138 rev.2
PDU Set Information Container
Rel-18 · approved3GPP CR ↗24.501 · CR 6802 rev.1
Correction to payload type and spare value handling for PD- Rel18
Rel-18 · approved3GPP CR ↗23.501 · CR 5255 rev.12
Clarifications for multi-modal services
Rel-18 · approved3GPP CR ↗23.503 · CR 1515 rev.4
Clarifications and corrections for ECN marking for L4S and congestion monitoring
Rel-18 · approved3GPP CR ↗23.502 · CR 5430 rev.3
N2 SM information to NG-RAN
Rel-18 · approved3GPP CR ↗23.501 · CR 6204 rev.2
Fix PDU Set based Handling description
Rel-18 · approved3GPP CR ↗29.122 · CR 0928 rev.1
Corrections on the QoS monitoring events
Rel-18 · approved3GPP CR ↗29.522 · CR 1565 rev.1
L4S_SUPP Event handling
Rel-18 · approved3GPP CR ↗29.512 · CR 1339
Corrections on the attribute name
Rel-18 · approved3GPP CR ↗29.571 · CR 0637
Essential correction on the RTP Payload Type range for Protocol Description
Rel-18 · approved3GPP CR ↗29.244 · CR 0951
Essential correction on the RTP Payload Type range for Protocol Description
Rel-18 · approved3GPP CR ↗29.244 · CR 0945
Correct UPF Behavior of ECN Marking for L4S
Rel-18 · approved3GPP CR ↗23.501 · CR 5890 rev.1
XRM services support in Roaming scenarios
Rel-18 · approved3GPP CR ↗23.503 · CR 1280 rev.4
Averaging Window in Alternative QoS Parameter Set
Rel-18 · approved3GPP CR ↗Rel-18 context
CR activity across mapped specs
Context only: these CRs target mapped specifications in Rel-18; they are not automatically attributed to the feature.
23.501 · CR 3864 rev.5
Policy control enhancements to support multi-modal flows
reissued3GPP CR ↗23.503 · CR 0835 rev.7
Policy update to support policy control enhancements for multi-modal services
reissued3GPP CR ↗23.501 · CR 4036 rev.3
Introduction of Alternative S-NSSAI replacement determined by NSSF
revised3GPP CR ↗23.501 · CR 3792 rev.7
PCF support of 5GS Packet Delay Variation monitoring based on QoS monitoring mechanism and exposed to AF
reissued3GPP CR ↗23.503 · CR 0825 rev.3
Introduction of Power Saving requirements for XRM service
reissued3GPP CR ↗23.501 · CR 4033 rev.11
Support of discontinuous coverage
revised3GPP CR ↗23.501 · CR 3887 rev.6
Introduction of 5GS information exposure
reissued3GPP CR ↗23.501 · CR 4046 rev.12
Support of PDU Set based handling
reissued3GPP CR ↗23.501 · CR 3896 rev.12
Update TS23.501 to reflect conclusion of KI#4 for XRM in TR23.700-60
reissued3GPP CR ↗23.501 · CR 3919 rev.7
Introduction of KI#6 conclusion: uplink-downlink transmission coordination
reissued3GPP CR ↗23.501 · CR 3875 rev.14
Introduction of support for Jitter Measurement and End of Data Burst reporting to the NG-RAN
reissued3GPP CR ↗23.501 · CR 3956 rev.11
Transfer of Satellite Coverage Data to a UE and AMF
revised3GPP CR ↗23.501 · CR 3855 rev.11
Introduction of support for L4S
reissued3GPP CR ↗23.501 · CR 3759 rev.7
Support of XR and Media Services
reissued3GPP CR ↗23.501 · CR 3923 rev.10
Network exposure support for XR services
reissued3GPP CR ↗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 23.502
Procedures for the 5G System (5GS)
S2 · Rel-15inferredrank 2890strong evidence
graph adjacency
stage_realization_of with mapped TS/TR 23.501
TS 24.501
Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3
C1 · Rel-15inferredrank 1750strong evidence
TS 29.518
5G System; Access and Mobility Management Services; Stage 3
C4 · Rel-15inferredrank 1300strong evidence
TS 29.571
5G System; Common Data Types for Service Based Interfaces; Stage 3
C4 · Rel-15inferredrank 1300strong evidence
TS 29.503
5G System; Unified Data Management Services; Stage 3
C4 · Rel-15inferredrank 1275moderate evidence
TS 29.513
5G System; Policy and Charging Control signalling flows and QoS parameter mapping; Stage 3
C3 · Rel-15inferredrank 1250strong evidence
TS 29.522
5G System; Network Exposure Function Northbound APIs; Stage 3
C3 · Rel-15inferredrank 1250strong evidence
TS 29.510
5G System; Network function repository services; Stage 3
C4 · Rel-15inferredrank 1175moderate evidence
TS 29.512
5G System; Session Management Policy Control Service; Stage 3
C3 · Rel-15inferredrank 1125strong evidence
TS 29.502
5G System; Session Management Services; Stage 3
C4 · Rel-15inferredrank 1075strong evidence
TS 27.007
AT command set for User Equipment (UE)
C1 · Rel-4inferredrank 1050moderate evidence
TS 29.244
Interface between the Control Plane and the User Plane nodes
C4 · Rel-14inferredrank 1025strong 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.