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### P802.1ASbt: Timing and Synchronization for Time-Sensitive Applications
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The enhancements to current IEEE 802.1AS include [details](http://www.ieee802.org/1/files/public/docs2011/as-garner-p802-1ASbt-draft-par-0511-v4.pdf):
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- Support for Link Aggregation
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- Support for redundant pahts
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- c
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The enhancements to current IEEE 802.1AS include
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[details](http://www.ieee802.org/1/files/public/docs2011/as-garner-p802-1ASbt-draft-par-0511-v4.pdf):
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- support for Link Aggregation, no details specified yet, see
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[page 5](http://www.ieee802.org/1/files/public/docs2011/as-garner-summary-of-work-needed-for-p802-1ASbt-1111.pdf)
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- support for redundant paths, no details specified yet, see
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[page 9](http://www.ieee802.org/1/files/public/docs2011/as-garner-summary-of-work-needed-for-p802-1ASbt-1111.pdf)
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- improved performance (e.g., improved grandmaster changeover time,
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longer chains of time-aware systems), no details specified yet, see
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[page 12](http://www.ieee802.org/1/files/public/docs2011/as-garner-summary-of-work-needed-for-p802-1ASbt-1111.pdf)
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- management support for automatic measurement of link delay
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asymmetry:
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- [see](http://www.ieee802.org/1/files/public/docs2011/asbt-huang-measurement-of-link-delay-asymmetry-1031-v00.pdf)
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- [see](http://www.ieee802.org/1/files/public/docs2011/as-huang-compensation-for-physical-line-asymmetry-0311.pdf)
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### P802.1Qbv : Enhancements for Scheduled Traffic
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- to provide lower network delays
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- defines ways for bridges and end stations to schedule the
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transmission of frames based on timing derived from IEEE Std 802.1AS
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- improved performance (e.g., improved grandmaster changeover time,
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longer chains of time-aware systems)
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- management support for automatic measurement of link delay
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asymmetry,
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[see](http://www.ieee802.org/1/files/public/docs2011/asbt-huang-measurement-of-link-delay-asymmetry-1031-v00.pdf)
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### P802.1Qbu : Frame Preemption
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