Patent Document ID: 7915962
Application ID: 12497980
Patent Flag: 1

Claim One:
1. A method comprising: for an oscillator local to a device that is disciplined by an external reference signal, for a duration of time the oscillator is locked to the external reference signal: determining a correction signal that is a function of the external reference signal and which is used to discipline the oscillator; sampling the correction signal; storing samples of the correction signal; for at least one mathematical model of the oscillator, for the duration of time the oscillator is locked to the external reference signal: training the at least one mathematical model based at least on the correction signal not including the samples of the correction signal; after a specified duration of time of the oscillator being locked to the external reference signal, determining a predicted correction signal; determining a difference between the predicted correction signal and the samples of the correction signal to produce a frequency error that represents an error that would occur if the predicted correction signal was used to discipline drift in the oscillator; integrating over time the frequency error to produce a time error that represents an error that would occur if the predicted correction signal was used to discipline drift in the oscillator; outputting the time error.