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ITU-T - G.8271.1

(Pre-Published) Network limits for time synchronization in packet networks

inactive
Organization: ITU-T
Publication Date: 1 August 2013
Status: inactive
Page Count: 33
scope:

This ITU-T Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be provided at the boundary of these packet networks at phase and time synchronization interfaces. It also outlines the minimum requirements for the synchronization function of network elements.

This Recommendation addresses the case of time and phase distribution across a network with packetbased method with full timing support to the protocol level from the network. The packet networks that are in the scope of this Recommendation are currently limited to the following scenarios:

  • Ethernet ([IEEE 802.3], [IEEE 802.1DTM], [IEEE 802.1QTM ] and [IEEE 802.1QayTM ])
  • MPLS [[IETF RFC 3031], [ITU-T G.8110]]
  • IP [[IETF RFC 791], and [RFC 2460]]

The physical layer that is relevant to this specification is the Ethernet media types as defined in IEEE Standard 802.3 TM -2005.

Document History

G.8271.1 AMD 1
June 1, 2023
Network limits for time synchronization in packet networks with full timing support from the network Amendment 1
This Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
G.8271.1
November 1, 2022
Network limits for time synchronization in packet networks with full timing support from the network
This Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
G.8271.1 AMD 2
February 1, 2022
Network limits for time synchronization in packet networks with full timing support from the network Amendment 2
This Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
ITU-T G.8271.1
October 1, 2020
Network limits for time synchronization in packet networks with full timing support from the network Amendment 1
This Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
ITU-T G.8271.1
March 1, 2020
Network limits for time synchronization in packet networks with full timing support from the network
This Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
ITU-T G.8271.1
August 1, 2019
Network limits for time synchronization in packet networks Amendment 2
A description is not available for this item.
ITU-T G.8271.1
March 1, 2018
Network limits for time synchronization in packet networks Amendment 1
A description is not available for this item.
ITU-T G.8271.1
October 1, 2017
Network limits for time synchronization in packet networks
A description is not available for this item.
G.8271.1
August 1, 2013
(Pre-Published) Network limits for time synchronization in packet networks
This ITU-T Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
View Less
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References

This document references:
1588A - A Precision Clock Synchronization Protocol for Networked Measurement and Control Systems Amendment 3: Precision Time Protocol (PTP) Enhancements for Best Master Clock Algorithm (BMCA) Mechanisms
Published by IEEE on September 21, 2023
Updates to information and messages for the Enhanced Accuracy TLV are provided in this amendment to IEEE 1588-2019. This amendment also clarifies the operation of the best master clock algorithm...
This document references:
IEEE 802.1Q - Local and Metropolitan Area Networks - Bridges and Bridged Networks Amendment 31: Stream Reservation Protocol (SRP) Enhancements and Performance Improvements
Published by IEEE on June 14, 2018
Enhancements to the configuration of time-sensitive streams are provided by this amendment to IEEE Std 802.1Q-2018.
This document references:
IEEE 802.3 - Standard for Ethernet Amendment 4: Physical Layers and Management Parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s Operation over Single‐Mode Fiber
Published by IEEE on November 7, 2019
Abstract: This amendment to IEEE Std 802.3-2018 adds Physical Layer (PHY) specifications and management parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s operation over single-mode fiber with reaches of...
This document is referenced by:
ITU-T G.8273 - Framework of phase and time clocks
Published by ITU-T on March 1, 2018
This Recommendation is a framework Recommendation for phase and time clocks for devices used in synchronizing network equipment that operate in the network architecture defined in [ITU-T G.8271],...
This document is referenced by:
ITU-T G.8275 - Architecture and requirements for packet-based time and phase distribution
Published by ITU-T on October 1, 2020
This Recommendation describes the general architecture of time and phase distribution using packet-based methods. This version of the Recommendation focuses on the distribution of time and phase...
This document is referenced by:
ITU-T G.8273.2 - Timing characteristics of telecom boundary clocks and telecom time slave clocks for use with full timing support from the network
Published by ITU-T on October 1, 2020
This Recommendation specifies minimum requirements for time and phase synchronization devices used in synchronization network equipment that operates in the network architecture as defined in [ITU-T...
This document is referenced by:
ITU-T G.8271 - Time and phase synchronization aspects of telecommunication networks
Published by ITU-T on March 1, 2020
This Recommendation defines time and phase synchronization aspects in telecommunication networks. It specifies the suitable methods to distribute the reference timing signals that can be used to...
This document is referenced by:
ITU-T G.8271.2 - Network limits for time synchronization in packet networks with partial timing support from the network
Published by ITU-T on August 1, 2017
This Recommendation specifies the maximum network limits of phase and time error that shall not be exceeded. It specifies the minimum equipment tolerance to phase and time error that shall be...
View Less
View All
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