Clock Synchronization: Combining IEEE 1588 and Adaptive Oscillator Correction Method
Carleton University, Ontario, Canada. January 2012.

The thesis proposes to combine the IEEE 1588 protocol and the adaptive oscillator correction method (AOCM) to improve master-slave synchronization. This is done by extending the AOCM to a slave clock to train a model using the IEEE 1588 synchronization updates from a master clock. The model corrections are applied to the slave clock during the waiting period in between the synchronization updates and when the slave-master network experiences an outage. The NS-2 results indicate that the slave accuracy improves up to 10 times for no traffic networks depending on the slave clock training period.

 

In traffic scenarios, the slave accuracy is affected by the asymmetric delays such that the degree of accuracy is one half of the asymmetric latencies. During network congestion, the slave accuracy improves because the delays are less asymmetric. During an outage in a traffic scenario, the solution only improves the slave clock stability.