Patent ID: 7423935
Filing Date: 2008-09-09
Classification: G04G,G04R

Abstract:
1. An electronic equipment comprising: a radio information reception unit for receiving external radio information including time information having external time data; an internal time measuring unit for measuring the internal time based on a reference clock; a time data comparison unit for comparing external time data received by said radio information reception unit with internal time data measured by said internal time measuring unit, and for outputting the difference therebetween as difference data; a storage unit for storing at least a plurality of data sets, each data set including the observed time when each external time data is received and the corresponding difference data determined from the received external time data; a reception control unit having a correction calculation unit for calculating an estimated correction value using said plurality of data sets and the elapsed time since the last information reception operation of said radio information reception unit; and an internal time correction control unit for correcting the internal time by using said estimated correction value when reception of said external radio information having external time data fails.