System frame number (SFN) evaluator

A program product for evaluating a system frame number (SFN), the program product comprising computer-executable instructions contained on a computer-readable medium and configured for causing the following computer-executed steps to occur when executed by a processor:

• determining a time difference between a continuous counter elapsed time and a calculated elapsed time, the continuous counter elapsed time generated by a continuous counter remaining active during a sleep state and the calculated elapsed time based on a access terminal current SFN derived from a discontinuous counter value generated by a discontinuous counter deactivated during the sleep state;
• and
• invoking an SFN reacquisition procedure if the time difference is greater than a threshold.

A method for evaluating a system frame number (SFN), comprising:

• determining a time difference between a continuous counter elapsed time and a calculated elapsed time, the continuous counter elapsed time generated by a continuous counter remaining active during a sleep state and the calculated elapsed time based on a access terminal current SFN derived from a discontinuous counter value generated by a discontinuous counter deactivated during the sleep state;
• and
• invoking an SFN reacquisition procedure if the time difference is greater than a threshold.

An apparatus for evaluating a system frame number (SFN), comprising:

• means for determining a time difference between a continuous counter elapsed time and a calculated elapsed time, the continuous counter elapsed time generated by a continuous counter remaining active during a sleep state and the calculated elapsed time based on a access terminal current SFN derived from a discontinuous counter value generated by a discontinuous counter deactivated during the sleep state;
• and
• means for invoking an SFN reacquisition procedure if the time difference is greater than a threshold.