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Work item:
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G.781.1
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Subject/title:
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Synchronization layer functions for packet-based synchronization
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Status:
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Approved on 2025-05-14 [Issued from previous study period]
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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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Rev.
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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IEEE 802
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Supporting members:
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Huawei, Ericsson, Nokia, Microchip, CMCC
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Summary:
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Recommendation ITU-T G.781.1 specifies a functional architecture model and corresponding atomic functions for the transport of time and frequency synchronization via packet-based methods using the precision time protocol (PTP).
This revision of G.781.1 provides the following updates:
• Revised terminology based on inclusive language
• Updated Figure 6-1 "The high-level functional architecture for transport of packet-based synchronization via PTP ober transport layers"
• Updated Figure 8-11 "Clock mode state transitions", the definitions of the modes and Table 8-10 "Transition information"
• Updated clause 9.2 "OTUk to SD-p adaptation functions"
• Corrected OTSn to OSC in clause 9.3
• Added clause 9.4 "FlexE to SD-p adaptation functions"
• Added clause 9.6 "MTNSy to SD time sync adaptation functions"
• Added details in Appendix III "Analysis of message delay times for NEs in packet-based synchronization networks"
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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:
2022-11-30 15:33:35
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Last update:
2025-04-14 17:09:07
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