MediaGateway
User Manual
82
Figure 5-1: Sync and Follow_Up messages
The Time synchronization information contained on the Sync and Follow Up messages
sent by the „Time-aware system i-1“ is redirected and only received by the
MediaGateway processor.
These packets are decoded, and the relevant information extracted. The extracted
information is used later to generate, together with the information extracted from the
propagation delay algorithm, the new corrected Sync and Follow Up messages that
will be sent to the „Time-aware system i+1“. In the new generated packets, a field called
“correction field” will be changed and this parameter will be used on reception side to
adjust the reference time of the system considering the delay of the switch and the
delay in the path „Time-aware system i-1“ to „Time-aware system i“.
