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ISO/IEC FDIS 8802-1AS

2013 Edition, July 18, 2013

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INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - LOCAL AND METROPOLITAN AREA NETWORKS - PART 1AS: TIMING AND SYNCHRONIZATION FOR TIME-SENSITIVE APPLICATIONS IN BRIDGED LOCAL AREA NETWORKS



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NOW A PUBLISHED STD * SEE ISO/IEC/IEEE 8802-1AS
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Description / Abstract:

This standard specifies the protocol and procedures used to ensure that the synchronization requirements are met for time-sensitive applications, such as audio and video, across bridged and virtual bridged local area networks consisting of local area network (LAN) media where the transmission delays are fixed and symmetrical; for example, IEEE 802.3TM full-duplex links. This includes the maintenance of synchronized time during normal operation and following addition, removal, or failure of network components and network reconfiguration. It specifies the use of IEEE 1588TM specifications where applicable in the context of IEEE Std 802.1DTM-2004 and IEEE Std 802.1QTM-2005.1 Synchronization to an externally provided timing signal (e.g., a recognized timing standard such as UTC or TAI) is not part of this standard but is not precluded.

Purpose

This standard enables stations attached to bridged LANs to meet the respective jitter, wander, and time synchronization requirements for time-sensitive applications. This includes applications that involve multiple streams delivered to multiple endpoints. To facilitate the widespread use of bridged LANs for these applications, synchronization information is one of the components needed at each network element where time-sensitive application data are mapped or demapped or a time-sensitive function is performed. This standard leverages the work of the IEEE 1588 Working Group by developing the additional specifications needed to address these requirements.

1Information on references can be found in Clause 2.
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