104results about How to "Reduce CPU load" patented technology

An apparatus for controlling a Hybrid Automatic Repeat Request (HARQ) is provided. In the apparatus, a physical layer includes a decoder for decoding a control message received over the packet data control channel, a demodulator for demodulating packet data received over the packet data channel, and a turbo decoder for decoding the demodulated packet data. A physical layer's HARQ controller determines whether to demodulate and decode the received packet data depending on a decoding result of the control message, outputs the decoded control message to the demodulator and the turbo decoder for demodulation and decoding of the received packet data, controls output of a response signal according to decoding result of the packet data, and delivers the turbo-decoded packet data to an upper layer.

In a first-hop router, a reachability monitor monitors RP (Rendezvous-Point) reachability, and the number of times when a response time is not shorter than a predetermined time is stored in a RP management table. An RP selection process controls not to select RP whose reachability from the first-hop router is not stable, so that PIM Register transmission to an unstable RP is suppressed.

The invention discloses a method for recovering a lost media data packet. A stream media server sends and caches media data stream; a client-side receives and caches the media data stream; when the client-side detects that the cached media data stream internally loses a media data packet, the client-side sends a renunciative massage to the stream media server, wherein the renunciative massage carries packet lost information of the media data stream; the stream media server sets forward error correction coding redundancy according to the packet lost information of the media data stream and obtains a media data packet to be recovered from the media data stream cached by the stream media server; the stream media server encodes the media data packet to be recovered into forward error correction data to be sent the client-side according to the forward error correction coding redundancy; and the client-side recovers the lost media data packet according to the forward error correction data and the media data stream cached by the client-side. The invention also discloses a system for recovering the lost media data packet. By adopting the method, network bandwidth can be saved, and the CPU load of the stream media server can be reduced.

The invention discloses a method for adaptively adjusting the paging sending time number. The method includes the steps of obtaining configuration parameters CCCH and AG of a base station service cell, obtaining the twice-paging time number, the once-paging time number and the paging information request time number of the base station service cell, calculating a paging load, judging whether the current paging load is larger than or equal to a set paging load threshold value or not according to the current paging load, reducing the maximum paging information retransmission time number if the current paging load is larger than or equal to the set paging load threshold value, and increasing the maximum paging information retransmission time number if the current paging load is smaller than the set paging load threshold value. The invention further discloses a system for adaptively adjusting the paging sending time number. By means of the method and system, the maximum paging information retransmission time number can be dynamically and adaptively adjusted in real time, the load of a CPU can be lowered, the condition that retransmitted paging information loses efficacy due to long residence time is reduced, the use efficiency of an CCCH channel can be further improved, and indexes of the network paging success rate can be improved.

A CPU calculates, based on a frequency command value for driving a motor and on a state quantity of the motor, an output-voltage command value in which only the phase advances while amplitude is constant in each calculation period, without reducing the calculation period. An ASIC reflects the output-voltage command value in a triangular wave signal in a time-series order to compare with each other, and outputs a PWM signal to a switching circuit. Thus, a waveform of an output voltage is made close to a sine wave irrespective of an output frequency being high or low, and a processing load of the CPU is reduced.

A DMA controller achieving real-time control of a DMA transfer relating to periodically operated peripheral devices at a low cost and with low power consumption. A typical embodiment of the invention is a DMA controller having: a counter for counting time; a counter comparator comparing a value of the counter and a counter value indicating an expected time of a DMA transfer; a peripheral device read unit reading a register of the peripheral device to acquire a state of a peripheral device by; and a state comparator comparing a value of the register read by the peripheral device read unit and a start condition of the DMA transfer, in which, with being triggered by establishment of a comparison result by the counter comparator, in accordance with a specified order, a processing of updating the counter value indicating the expected time of a DMA transfer to a value indicating a next expected time, a read of the register of the peripheral device by the peripheral device read unit, a comparison by the state comparator, and a DMA transfer on the condition that the comparison result by the state comparator is established are executed.

The rotation angle detection apparatus for detecting a rotation angle of a rotating body on the basis of a resolver signal outputted from a resolver mounted on the rotating body includes a first function of detecting a specific phase timing of the resolver signal, a second function of measuring a time needed for the resolver signal to reach from the specific phase timing to a peak thereof, a third function of generating a sampling timing in accordance with the time measured by the second function, a fourth function of sample-holding the resolver signal at the sampling timing to hold a peak value of the resolver signal, and a fifth function of computing the rotation angle of the rotating body on the basis of the peak value of the resolver signal held by the fourth function.

A method for capturing an image using an image capturing module with multiple pixels configured in a 2-dimensional matrix and a focal plane electronic shutter function which sequentially slides the exposure timing by constant interval by pixel group which is a unit of predetermined number of the pixels while scanning; the method includes an image data input process for detecting shutter operation, obtaining a reference image while skipping one or more of the pixel groups by sequentially sliding the exposure timing by the constant interval, and obtaining a target image while not skipping pixel groups to be captured, a motion data detection process for calculating the motion data of the target image based on the reference image, and a distortion compensation process for compensating for distortion in the target image according to the motion data.

A microcomputer which obtains a rotor position signal from a biphase signal delivered by a resolver mounted on an electric motor according to a rotation phase of a rotor relative to a stator, thereby controlling the motor based on the rotor position signal. The microcomputer includes a digital signal converter which is configured by hardware and converts the biphase signal delivered from the resolver into a digital data position signal, the digital signal converter being mounted on a single chip.