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 mapping begins in Rel-18
Feature lineage · XR / Immersive Media
Extended-reality service requirements, media and QoS context.
Mapped specs4
Explicit stage labels0
Inferred orientations4
Relationships2
Connected WIs43
Rel-15 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.
5GS_Ph1Rel-15 · connected · 97%
3GPP ↗5GS_Ph1-CTRel-15 · connected · 100%
3GPP ↗5G_MTSI_CodecsRel-15 · connected · 100%
3GPP ↗EQoE_MTSIRel-15 · connected · 100%
3GPP ↗LTE_AerialRel-15 · connected · 99%
3GPP ↗NETSLICE-5GTRACERel-15 · connected · 100%
3GPP ↗NR_newRAT-CoreRel-15 · connected · 100%
3GPP ↗SMARTERRel-15 · connected · 100%
3GPP ↗LTE_VoLTE_ViLTE_enh-S4Rel-14 · connected · 100%
3GPP ↗NB_IOTenh-CoreRel-14 · connected · 100%
3GPP ↗TEI14Rel-14 · connected · 100%
3GPP ↗DUMMYRel-13 · 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
No indexed CRs are linked to the primary Work Item at or before this release.
Rel-15 context
CR activity across mapped specs
Context only: these CRs target mapped specifications in Rel-15; they are not automatically attributed to the feature.
22.261 · CR 0002
Replacement of 5G-RAN with NG-RAN
revised22.261 · CR 0003
Updates to Definitions in TS 22.261
revised22.261 · CR 0003 rev.1
Updates to Definitions in TS 22.261
noted22.261 · CR 0004
Clarification on Multiple Network
revised22.261 · CR 0004 rev.1
Clarification on Multiple Network
revised22.261 · CR 0009
Clarification of POTS and H.248
noted22.261 · CR 0010
Update of charging aspects in 22.261
noted22.261 · CR 0011
Editorial modification for clarification on removal of network function
revised22.261 · CR 0011 rev.1
Editorial modification for clarification on removal of network function
revised22.261 · CR 0011 rev.2
Editorial modification for clarification on removal of network function
revised22.261 · CR 0015 rev.2
Efficient User Plane
revised22.261 · CR 0015 rev.3
Efficient User Plane
revised22.261 · CR 0021 rev.1
Clarifications on network slicing
revised22.261 · CR 0021 rev.2
Clarifications on network slicing
revised22.261 · CR 0021 rev.3
Clarifications on network slicing
approvedTraceability 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.