Chapter 1:
Introduction
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v3.3-a 12/07/2022
1.4 About White Rabbit / High-Accuracy Technology
One of the key-feature of the WR-ZEN family is that it fully supports the White Rabbit protocol,
an extension of the IEEE 1588 (PTP), to achieve
ultra-accurate sub-nanosecond synchronization
in Ethernet-based networks. Since the publication of the new IEEE 1588-2019, White Rabbit is
also known as “PTP High Accuracy”
(HA) profile with the following characteristics:
•
Time Precision:
WR/HA provides a common clock for physical layer in the entire network,
allowing synchronization at sub-nanosecond level with picoseconds precision. In other
words, the timing budget consumed by WR/HA is almost insignificant.
•
Scalability:
WR/HA networks are designed to be highly scalable supporting thousands of
nodes and long-distance links within the range of metro area deployments. Its
performance is not affected by traffic as other PTP profiles.
•
Cost effective solution:
WR/HA avoid expensive costs related to calibration and complex
deployments with high requirements of maintenance, allowing plug-and-play links in
Local Area Networks (LANs).
•
Integration:
WR/HA is based on existing protocols and standards (such as PTP, Ethernet)
so it is very easy to integrate in the existing network infrastructure.
