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ITU-T Y.3221 (11/2025)

Fixed, mobile and satellite convergence – Local data switching for IMT-2020 networks and beyond

Recommendation ITU-T Y.3221 specifies the requirements, architecture, information flows and security considerations of local data switching for fixed, mobile and satellite convergence (FMSC) in the context of IMT-2020 networks and beyond. Local data switching is a capability that enables the routing and processing of user data traffic locally for users accessing the network. FMSC is the capability that provides services and applications to end users regardless of the fixed, mobile or satellite access technologies being used.

Citation:	https://handle.itu.int/11.1002/1000/16457
Series title:	Y series: Global information infrastructure, Internet protocol aspects, next-generation networks, Internet of Things and smart cities Y.3000-Y.3499: Future networks
Approval date:	2025-11-06
Provisional name:	Y.FMSC-LDS
Approval process:	TAP
Status:	In force
Maintenance responsibility:	ITU-T Study Group 13
Further details:	Patent statement(s) Development history [26 related work items in progress]

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
1	Y.3221 (11/2025)	In force	here	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
Y Suppl. 56 (12/2019)	ITU-T Y-series – Supplement on use cases of smart cities and communities	In force	here	here	here
Y Suppl. 68 (05/2021)	Framework for Internet of things ecosystem master plan	In force	here	here	here
Y Suppl. 69 (05/2021)	Web-based data model for Internet of things and smart city systems and services	In force	here	here	here
Y Suppl. 71 (07/2022)	ITU-T Y.3000 series – Use cases for autonomous networks	In force	here	here	here
Y Suppl. 72 (11/2022)	ITU-T Y.3000-series – Artificial intelligence standardization roadmap	In force	here	here	here
Y Suppl. 75 (03/2023)	ITU-T Y.3000 series – Quantum key distribution networks – Quantum-enabled future networks	In force	here	here	here
Y Suppl. 81 (03/2024)	ITU-T Y.3200 series – Use cases of satellite communications in developing countries	In force	here	here	here
Y Suppl. 82 (07/2024)	Standardization gaps and roadmap for artificial intelligence and Internet of things in digital agriculture	In force	here	here	here
Y Suppl. 83 (07/2024)	Optimizing digital agriculture with best practices for integrating artificial intelligence and Internet of things	In force	here	here	here
Y Suppl. 95 (11/2025)	Use cases of open service environment for future networks	In force	here	-	here
Y Suppl. 96 (11/2025)	Machine learning standardization roadmap	In force	here	here	here
Y Suppl. 97 (11/2025)	Glossary of terms and definitions for machine learning	In force	here	-	here

Title	Approved on	Download
ITU-T Focus Group IMT-2020 Deliverables	2017	here
Multiple radio access technologies	2012	here
Future networks	2012	here

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ITU-T Recommendations

ITU-T Y.3221 (11/2025)