A key challenge with the boundary clock based distribution model is that time is not delivered from a central point that can be monitored easily. Instead each and every boundary clock becomes a potential source of error.
Each point introduces the chance of error, each cable between these points introduces the possibility of error.
So long as the time feed from every boundary clock is not monitored by comparing it to several independent sources it leaves open the possibility that error in the system goes unnoticed.
Classic PTP: Only Single Source
Intelligent Mesh Creation
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Smart, effortless time distribution for a seamless network precision
If every node can automatically set itself up to receive time from the best sources available and distribute time to other sources with zero intervention and the transmission is nearly lossless, then some cool things follow as a result :
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As time is propagated from node to node the root distance is increased for every hop
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The cumulative error of the source is used to determine the hop cost
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Additionally, static hop costs can be added
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This approach ensures that we form a directed acyclic graph
PTP+Squared
Multiple independent sources
Precise network timing through
multi-source synchronisation
Timebeat takes a much more robust approach by allowing individual nodes in the network to compare time received from the:
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Existing boundary clock distribution network
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From an independent source of time
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And from other nodes in the network.
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