Timing control device and timing control method
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakahisa Yamauchi, Akihiro Shibuya
Life of this patent
Estimating the term…
Abstract
A control unit measures a phase error between a reference timing of a mobile station and a reception timing from a base station based on reception data from a reception unit and a count from a reference timing counter unit, determines a frequency deviation correction value calculation period corresponding to the measured phase error, and outputs it to a frequency deviation correction value calculation unit. The frequency deviation correction value calculation unit does not calculate a deviation at every reception time when intermittent reception is repeated, but calculates a deviation at intervals following the frequency deviation correction value calculation period given from the control unit.
Claims14
A timing control device in a mobile station which counts reference timing of the mobile station using an accurate high-speed clock at time of normal communication with a base station, and counts reference timing of the mobile station according to a low-speed clock corrected based on a deviation between the high-speed clock pre-calculated at the normal communication time and a low-speed clock with low accuracy at sleep time in intermittent reception time, so as to manage end timing of the sleep time in the intermittent reception time, comprising:
- a fluctuation detector which obtains a phase error between a detecting position of an assumed reception channel and an actually detected position of a reception channel represented by the reference timing of the mobile station counted according to the high-speed clock at the reception time via the sleep time.
A timing control method employed in a mobile station, comprising:
- counting a reference timing of the mobile station using an accurate high-speed clock at time of normal communication with a base station, and counting the reference timing of the mobile station according to a low-speed clock corrected based on a deviation of the high-speed clock pre-calculated at the normal communication time and a low-speed clock with low accuracy at sleep time in intermittent reception time, to thereby manage end timing of the sleep time in the intermittent reception time;
- and
- obtaining a phase error between a detecting position of an assumed reception channel and a position of a reception channel actually detected represented by the reference timing of the mobile station counted according to the high-speed clock at reception time via the sleep time.
Dependencies are inferred from the claim text.