GEN7iB
291
GEN series SYNCHRONIZATION METHODS
GEN series SYNCHRONIZATION METHODS
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Fig. 14.9 Master/Slave offset measurement
The message exchange process is as follows:
1. The master sends a Sync message to the slave and notes the time, t
1
, at which it
was sent.
2. The slave receives the Sync message and notes the time of reception, t
2
3. The master conveys the timestamp t
1
to the slave the by either
a Embedding the timestamp t
1
in the Sync message (One-Step). This requires
some sort of hardware processing for highest accuracy and precision
OR
b Embedding the timestamp t
1
in a Follow_Up message (Two-Step).
4. The slave sends a Delay_Req message to the master and notes the time, t
3
, at
which it was sent.
5. The master receives the Delay_Req message and notes the time of reception, t
4
.
6. The master conveys the timestamp t
4
to the slave the by embedding it in a
Delay_Resp message.
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