... | @@ -58,13 +58,16 @@ achieved. |
... | @@ -58,13 +58,16 @@ achieved. |
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- it defines modified BMC (but similar to original)
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- it defines modified BMC (but similar to original)
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- IEEE 802.1AS devices are *logically syntonized* (time-aware
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- IEEE 802.1AS devices are *logically syntonized* (time-aware
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Bridgaes can correct time interval measurements using the
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Bridgaes can correct time interval measurements using the
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grandmaster frequency ratio conveyed in Follow\_UP's TLV \[p22
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grandmaster frequency ratio conveyed in Follow\_UP's TLV, p22 of
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of 2\]). Optional features \[1\]: IEEE 802.1AS bridges and end
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\[2\]). Optional features \[1\]: IEEE 802.1AS bridges and end
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stations are not be required to physically syntonize (using
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stations are not be required to physically syntonize (using
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frequency ratio) their frequency to the GM frequency (though
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frequency ratio) their frequency to the GM frequency (though
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they are be allowed to do this).
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they are be allowed to do this).
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- time synchronization requirement: -/+500ns with reference to
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- performance requirement, Annex B of \[2\]:
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network's grandmaster
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- synchronization over seven or fewer hops to within 1us
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peak-to-peak of each other during steady-state operation,B.3 of
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\[2\]
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- jitter and wander defined in B.4 of \[2\], page 250
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- references:
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- references:
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[1](http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4659212&tag=1),
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[1](http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4659212&tag=1),
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[2](http://standards.ieee.org/findstds/standard/802.1AS-2011.html)
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[2](http://standards.ieee.org/findstds/standard/802.1AS-2011.html)
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