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Work item:
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Y.FMSC-IN
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Subject/title:
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Fixed, mobile and satellite convergence - Isolated network for IMT-2020 networks and beyond
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Status:
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Under study
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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New
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Equivalent number:
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-
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Timing:
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2028-Q1 (Medium priority)
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Liaison:
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ITU-T SG11, SG17, ITU-R WP4B, ITU-R WP5D, 3GPP SA1, 3GPP SA2
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Supporting members:
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CICT, China Mobile, BUPT, China Unicom
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Summary:
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FMSC is the capability that provides services and applications to end users regardless of the fixed, mobile or satellite access technologies being used. To preserve service continuity, the network isolated mode, a temporary operational mode of FMSC, ensures continued service when either the backhaul link between the satellite and the ground station or the IMT-2020 core network becomes unavailable. It can eliminate the service interruption period before the backhaul link is re-established or core network services are restored. Through the network isolated mode, the IMT-2020 network maintains connection services after the satellite loses backhaul connectivity. UEs can communicate with a temporary service server and with each other when the isolated operation mode is activated. This Recommendation specifies the network isolated mode for FMSC for IMT-2020 networks and beyond, in the aspects of requirements, architecture and information flows.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2026-03-04 16:55:35
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Last update:
2026-08-13 16:38:46
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