A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Multi-Path Time Synchronization
Author(s) : Alex Shpiner
Richard Tse
Craig Schelp
Tal Mizrahi
Filename : draft-shpiner-multi-path-synchronization-00.txt
Pages : 15
Date : 2012-10-15
Abstract:
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. Slave Diversity is a recently
introduced approach, where the master and slave clocks (also known as
server and client) are connected through multiple network paths, and
the slave combines the information received through all paths to
obtain a higher clock accuracy compared to the conventional one-path
approach. This document describes a multi-path approach to PTP and
NTP over IP netwokrs, allowing the protocols to run concurrently over
multiple communication paths between the master and slave clocks. The
multi-path approach can significantly contribute to clock accuracy,
security and fault protection. The Multi-Path Precision Time Protocol
(MPPTP) and Multi-Path Network Time Protocol (MPNTP) define an
additional layer that extends the existing PTP and NTP without the
need to modify these protocols. MPPTP and MPNTP also allow backward
compatibility with nodes that do not support the multi-path
extension.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-shpiner-multi-path-synchronization
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-shpiner-multi-path-synchronization-00
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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