1. Space-Time Diagrams for clock synchronization
Used at UNH-IOL for training and discussion
Network delay is displayed in orange.
Jeff Laird
July 2012

2. master slave sync message, response, and follow up
(in PTP: Sync, Delay_Req, Delay_Resp)

3. master slave T1 T2 T3 T4 (T2 − T1) + (T4 − T3) = (T4 − T1) − (T3 − T2)
with time labels T3 T4
(T2 − T1) + (T4 − T3)
(T4 − T1) − (T3 − T2) =

4. master
slave
delay asymmetry

5. peer peer peer-to-peer delay measurement (in PTP: Pdelay_Req,
Pdelay_Resp,
Pdelay_Resp_Follow_Up)

6. peer peer T1 T2 T3 T4 (T2 − T1) + (T4 − T3) = (T4 − T1) − (T3 − T2)
with labels T3 T4
(T2 − T1) + (T4 − T3)
(T4 − T1) − (T3 − T2) =