Mediatek Corporation

Ming-Chi Chen

Ganning Yang

Yi-Jung Chiang

Ching-Chao Yang

Chun-Kun Chan

Jia-Ching Lin

To-Ping Wang

An apparatus for performing timer management regarding a system timer scheduler service includes: a processor arranged to control operations of the apparatus; an ordinary timer arranged to provide the processor with time ticks, for use of timing control; and a hardware-based Operating System (OS) timer arranged to provide the processor with at least one scheduler timer, for use of the system timer scheduler service. An associated method for performing timer management regarding a system timer scheduler service is also provided, and can be applied to the apparatus. In particular, the apparatus and the method can give considerations to both run-time power consumption and sleep mode power consumption. For example, the hardware-based OS timer can support an event-based OS timer scheduler to save the run-time power consumption. In another example, the hardware-based OS timer can support timer alignment in accordance with modulator/demodulator (modem) activities to minimize the sleep mode power consumption.

Apparatus for performing timer management regarding a system timer scheduler service, and associated method

A wireless communications device connected to a service network with a synchronized timing pattern therebetween is provided. In the wireless communications device, a wireless modem is configured to enable wireless signal transceiving from and to the service network in a non-sleep mode and disable wireless signal transceiving from and to the service network in a sleep mode. Also in the wireless communications device, a synchronization module is configured to initialize a first counter with a current time in the synchronized timing pattern in response to a first signal triggering the wireless modem to enter the sleep mode from the non-sleep mode, and enable counting of the first counter in a low-rate clock for the sleep mode. The synchronization module further provides the counted value of the first counter to the wireless modem to resynchronize with the service network in response to a second signal triggering the wireless modem to recover from the sleep mode to the non-sleep mode.

Resynchronization method for recovering from sleep mode and apparatuses using the same

A method for clock calibration is provided. The method comprises receiving discontinuous reception period (DRX period) information from a base station, computing a calibration duration according to the discontinuous reception period and a clock error tolerance of a first clock, and when receiving paging information that informs of possible sent transmissions, calibrating the first clock with a second clock for a period of the calibration duration.

Method for clock calibration

A dual-mode communication apparatus and a method thereof are provided. The dual-mode communication apparatus comprises a microprocessor, a first tick generator, a second tick generator, and an operation system tick module that comprises a tick converter and an OS tick generator. The microprocessor receives an OS clock tick to execute a real-time program task. The first tick generator receives a first predetermined number of first clocks to generate a first clock tick when the first clock is active. The second tick generator receives a second predetermined number of second clocks to generate a second clock tick when the second clock is active. The tick converter, coupled to the first and second tick generators, converts the second clock tick such that the converted second clock tick has a converted clock tick rate substantially identical to the clock tick rate of the first clock tick. The OS tick generator, coupled to the tick converter, receives the first clock tick and the converted second clock tick to generate the OS clock tick for use in the microprocessor.

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Taipei County, Taiwan

Ming-Chi Chen