Release ledger
Canonical Atlas record
TS 29.531
5G System; Network Slice Selection Services; Stage 3
Responsible WGC4
StatusUnder change control
Initial releaseRel-15
Selected releaseRel-18
Latest indexed version20.0.0
Series29
TypeTS
Release evolution
Compare evidence between releases
Use indexed version, Work Item and Change Request evidence to see what changed around this specification. This is an evidence trail, not a clause-by-clause normative diff.
Rel-18 snapshot
Work affecting this release
114 indexed Change Requests · 3 connected Work Items.
Showing 12 CR records from the available cross-release sample. Browse release CR records (JSON) →
CR 0270 — 29.531 Rel-18 API version and External doc update
CR 0265 rev.1 — Correction of Nnssf_NSSAIAvailability API naming and OpenAPI media type
CR 0242 — 29.531 Rel-18 API version and External doc update
CR 0233 rev.2 — Essential Correction on SNSSAI Validity Time Information
CR 0235 — Correction on IE Conditions
CR 0219 rev.1 — Corrections on API version in URI of the service operations
CR 0216 rev.1 — Miscellaneous corrections
CR 0209 — 29.531 Rel-18 API version and External doc update
CR 0208 rev.1 — SMF as consumer of NSSF
CR 0205 rev.1 — NWDAF as consumer of NSSF service
CR 0202 rev.1 — Returning UNSUPPORTED_EVENT_TYPE
CR 0203 — Feature negotiation correction
Version history
Indexed versions
Showing 60 of 62 indexed versions.
20.0.0Rel-20CT#1122026-07-01
19.7.0Rel-19CT#1122026-07-01
18.10.0Rel-18CT#1122026-07-01
17.12.0Rel-17CT#1122026-07-01
16.11.0Rel-16CT#1122026-07-01
15.8.0Rel-15CT#1122026-07-01
19.6.0Rel-19CT#1112026-03-19
19.5.0Rel-19CT#1102026-01-06
19.4.0Rel-19CT#1092025-09-28
19.3.0Rel-19CT#1082025-06-23
18.9.0Rel-18CT#1082025-06-23
19.2.0Rel-19CT#1072025-03-17
19.1.0Rel-19CT#1062025-01-07
19.0.0Rel-19CT#1052024-09-19
18.8.0Rel-18CT#1052024-09-19
17.11.0Rel-17CT#1052024-09-19
18.7.0Rel-18CT#1042024-06-26
17.10.0Rel-17CT#1042024-06-26
16.10.0Rel-16CT#1042024-06-26
18.6.0Rel-18CT#1032024-03-27
17.9.0Rel-17CT#1032024-03-27
18.5.0Rel-18CT#1022024-01-08
17.8.0Rel-17CT#1022024-01-02
16.9.0Rel-16CT#1022024-01-02
15.7.0Rel-15CT#1022024-01-02
18.4.0Rel-18CT#1012023-09-19
18.3.0Rel-18CT#1002023-06-26
18.2.0Rel-18CT#992023-03-29
17.7.0Rel-17CT#992023-03-29
18.1.0Rel-18CT#98-e2022-12-16
18.0.0Rel-18CT#97-e2022-09-23
17.6.0Rel-17CT#97-e2022-09-23
17.5.0Rel-17CT#962022-06-21
17.4.0Rel-17CT#95-e2022-03-19
17.3.0Rel-17CT#94-e2021-12-17
17.2.0Rel-17CT#93-e2021-09-17
16.8.0Rel-16CT#93-e2021-09-17
17.1.0Rel-17CT#92-e2021-06-29
16.7.0Rel-16CT#92-e2021-06-29
15.6.0Rel-15CT#92-e2021-06-29
17.0.0Rel-17CT#91-e2021-03-30
16.6.0Rel-16CT#91-e2021-03-30
16.5.0Rel-16CT#90-e2020-12-11
16.4.0Rel-16CT#89-e2020-09-25
16.3.0Rel-16CT#88-e2020-07-08
16.2.0Rel-16CT#87-e2020-03-30
16.1.0Rel-16CT#862019-12-20
16.0.0Rel-16CT#852019-09-23
15.5.0Rel-15CT#852019-09-23
15.4.0Rel-15CT#842019-06-13
15.3.0Rel-15CT#832019-03-25
15.2.0Rel-15CT#822018-12-19
15.1.0Rel-15CT#812018-09-22
15.0.0Rel-15CT#802018-06-15
2.0.0Rel-15 · pre-approvalCT#802018-06-07
1.2.0Rel-15 · pre-approvalCT4#852018-06-07
1.1.0Rel-15 · pre-approvalCT4#842018-05-02
1.0.0Rel-15 · pre-approvalCT#792018-03-12
0.4.0Rel-15 · pre-approvalCT4#832018-03-12
0.3.0Rel-15 · pre-approvalCT4#822018-02-05
Atlas classifications
Meaning and provenance
No Atlas classifications have been attached yet.
Work Items
Standards work connected to TS 29.531
5GS_Ph1
Rel-15official5G System - Phase 1
5GS_Ph1-CT
Rel-15officialCT aspects of 5G System - Phase 1
5G_eSBA
Rel-16historical linkEnhancements to the Service-Based 5G System Architecture
Historical association · verification pendingTEI16
Rel-16parsed(Small) Technical Enhancements and Improvements for Rel-16
Vertical_LAN
Rel-16historical link5GS Enhanced support of Vertical and LAN Services
Historical association · verification pendingeNS
Rel-16historical linkEnhancement of Network Slicing
Historical association · verification pendingEoIPR
Rel-17parsedEnhancement of Inter-PLMN Roaming
MINT
Rel-17historical linkSupport for Minimization of service Interruption
Historical association · verification pendingNR_slice-Core
Rel-17parsedCore part: Enhancement of RAN slicing for NR
NRslice
Rel-17historical linkCT1 aspects of enhancement of RAN Slicing for NR
Historical association · verification pendingSBIProtoc17
Rel-17parsedService Based Interface Protocol Improvements Release 17
TEI17
Rel-17parsed(Small) Technical Enhancements and Improvements for Rel-17
eNA_Ph2
Rel-17parsedEnablers for Network Automation for 5G - phase 2
eNS_Ph2
Rel-17parsedEnhancement of Network Slicing Phase 2
SBIProtoc18
Rel-18parsedService Based Interface Protocol Improvements Release 18
TEI18
Rel-18parsed(Small) Technical Enhancements and Improvements for Rel-18
eNS_Ph3
Rel-18parsedNetwork Slicing Phase 3
SBIProtoc19
Rel-19historical linkService Based Interface Protocol Improvements Release 19
Historical association · verification pendingTEI19
Rel-19parsed(Small) Technical Enhancements and Improvements for Rel-19
TEI19_NetShare
Rel-19parsed(Stage 2 of) Indirect Network Sharing
TEI20
Rel-20parsed(Small) Technical Enhancements and Improvements for Rel-20
Knowledge graph
Related standards
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