Multi-Path Time Synchronization
2016
Clock synchronization protocols are very widely used in IP-based
networks. The Network Time Protocol (NTP) has been commonly deployed
for many years, and the last few years have seen an increasingly rapid
deployment of the Precision Time Protocol (PTP). As time- sensitive
applications evolve, clock accuracy requirements are becoming
increasingly stringent, requiring the time synchronization protocols
to provide high accuracy. This memo describes a multi-path approach to
PTP and NTP over IP networks, allowing the protocols to run
concurrently over multiple communication paths between the master and
slave clocks, without modifying these protocols. The multi-path
approach can significantly contribute to clock accuracy, security and
fault tolerance. The multi-path approach that is presented in this
document enables backward compatibility with nodes that do not support
the multi-path functionality.
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