Users Guide

1686 Audio Video Bridging
Figure 47-1. IEEE 802.1S Master/Slave Device Relationships
The 802.1AS implementation described in this document is based on the
IEEE P802.1AS/D7.6 draft standard [1].
IEEE 802.1AS time synchronization provides a common time base for
sampling data streams at a source device and presenting those streams at a
destination device with the same relative timing. End-to-end synchronization
of clocks is critical for traffic that is highly time-sensitive and has stringent
latency and jitter requirements.
The advantages of using 802.1AS include:
• Network clock synchronization in the sub-microsecond range
• Synchronization of clocks with different precision, resolution, and stability
• Simple installation and maintenance
• Fast convergence when topology changes occur
• Low-cost implementation in multicast messaging networks such as
Ethernet