Patent ID: 6223050
Filing Date: 2001-04-24
Classification: G04R,H04J,H04W

Abstract:
In a cellular mobile radiotelephone (""CMR"") system, including a mobile switching center (""MSC"") for transmitting messages to a remote timepiece located within an area of the CMR system served by the MSC, a method for setting the remote timepiece comprising the steps of:(a) creating a data message having an address for the remote timepiece and a time stamp, the data message formatted for transmission by the MSC over a data channel of the CMR system;(b) transmitting the data message to the remote timepiece using the data channel of the CMR system; and(c) receiving the data message by the remote timepiece based on the address, whereby the remote timepiece extracts the time stamp from the data message and uses the time stamp for setting the remote timepiece in accordance with the time stamp;(d) measuring activity on the data channel; and(e) if the activity on the data channel is within an acceptable range, then repeating steps (a)-(c) using an updated time stamp in place of the time stamp in creating an updated data message, the updated time stamp reflecting time elapsed since the data message was created in step (a).