Specification
3GPP TS 29.561: 5G System; Interworking between 5G Network and external Data Networks; Stage 3
At a glance
- Title
- 5G System; Interworking between 5G Network and external Data Networks; Stage 3
- Newest version
- V20.1.0 (Rel-20)
- Versions indexed
- 8
- Newest per release
- Rel-16: V16.9.0 (2024-06-24); Rel-17: V17.11.0 (2024-09-16); Rel-18: V18.5.0 (2024-09-16); Rel-19: V19.6.0 (2026-06-22); Rel-20: V20.1.0 (2026-09-24)
In plain words
TS 29.561 defines stage 3 interworking procedures between a 5G Network and external DN or Network Slice Specific AAA. "For interworking between 5G PLMN and external DNs, the present document is valid for both 3GPP accesses and non-3GPP accesses." V20.1.0 includes 4 CRs covering typo correction, missing and corrected references, and a missing clause.
Source: 3GPP TS 29.561 V20.1.0, clause 1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/29_series/29.561/29561-k10.zip
Newest version in each release
| Release | Newest version | In the archive | TSG meeting |
|---|---|---|---|
| Rel-20 | V20.1.0 | 2026-09-24 | TSG CT #113 |
| Rel-19 | V19.6.0 | 2026-06-22 | TSG CT #112 |
| Rel-18 | V18.5.0 | 2024-09-16 | TSG CT #105 |
| Rel-17 | V17.11.0 | 2024-09-16 | TSG CT #105 |
| Rel-16 | V16.9.0 | 2024-06-24 | TSG CT #104 |
| Rel-15 | V15.7.0 | 2021-06-25 | TSG CT #92-e |
Source: 3GPP specification archive, versions indexed by 3GPP Scout. Each version links its official file.
Change requests in V20.1.0
V20.1.0 of TS 29.561 includes 4 CRs.
| CR | Category | Subject | Source | Working group meeting | TSG TDoc |
|---|---|---|---|---|---|
| CR 0221 rev 3 | D | Correction of typos | IPLOOK, Ericsson | CT3 #148 | CP-262115 |
| CR 0223 rev 3 | F | Addition of missing reference | IPLOOK, Ericsson | CT3 #148 | CP-262115 |
| CR 0224 rev 3 | F | Correction of reference | IPLOOK, Ericsson | CT3 #148 | CP-262116 |
| CR 0225 rev 1 | F | Corrections to references and missing clause | Ericsson | CT3 #148 | CP-262115 |
Source: 3GPP CR database.
Meetings behind the latest versions
Working group meetings that agreed the CRs in V20.1.0:
- CT3 #148: 4 CRs
Plenary meetings:
- TSG CT #113 approved V20.1.0 (Rel-20)
- TSG CT #112 approved V20.0.0 (Rel-20)
- TSG CT #112 approved V19.6.0 (Rel-19)
Source: 3GPP CR database and specification archive, as indexed by 3GPP Scout.
Clauses changed in V20.1.0
16 clauses changed or added in V20.1.0. The 10 with the largest edits are listed. Each clause number opens Scout on that clause.
| Clause | Title | Change | CRs |
|---|---|---|---|
| 10.2 | DN interworking Model of SMF or SMF+PGW-C for DHCP | changed | |
| 10.2.1 | Introduction | added | |
| 2 | References | changed | |
| B.4 | TLS Exporter Label | changed | |
| 12.4.0 | General | changed | |
| 15.2 | DN interworking Model of UPF for PIM | changed | |
| 10.3 | 3GPP Vendor-Specific Options | changed | |
| 11.1.1 | RADIUS Authentication and Authorization in 5GC | changed | |
| 11.1.1a | RADIUS Authentication and Authorization in EPC Interworking | changed | |
| 11.3.1 | General | changed |
Source: 3GPP Scout comparison of this version with the one before it.
Sources
- 3GPP TS 29.561 V20.1.0, clause 1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/29_series/29.561/29561-k10.zip
- 3GPP CR database.
How this page was made
The facts box and the tables come straight from the 3GPP specification archive and CR database as indexed by 3GPP Scout. An AI model (GPT-6 Luna) wrote the paragraph and named the source of each sentence. Code checked every quote word for word against the stored source text and every number against the cited source. A second AI model from another company (Claude Opus 5.5) reviewed the paragraph against the same sources. The 3GPP documents themselves govern.