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Showing papers on "Sleep (system call) published in 1998"


Patent
Makoto Sakai1
25 Nov 1998
TL;DR: In this paper, a power management event signal POWER_PME and an SCI interrupt are used to detect the change in power supply state by the internal battery or the external power supply, and the current system state changes to another system state.
Abstract: When the state of an internal battery or an external power supply changes, the change is detected by an embedded controller. The OS is informed of this change using a power management event signal POWER_PME and an SCI interrupt. In accordance with the change in power supply state by the internal battery or the external power supply, the current system state changes to another system state. Accordingly, the system state can dynamically change between sleep states in accordance with a change in power supply state of the computer. Trade-off between shortening of the time interval from a sleep state to system activation, and power saving during sleep can be optimized.

117 citations


Journal Article
TL;DR: It is found that shift work clearly affects sleep and wakefulness but that there is very little known empirically about optimal sleep-wake patterns--except for the ones commonly used but not evaluated, so computer simulations of the efficacy of alternative strategies must sometimes be used.
Abstract: This paper finds that shift work clearly affects sleep and wakefulness but that there is very little known empirically about optimal sleep-wake patterns--except for the ones commonly used but not evaluated, for example, extension of morning sleep after night work, split sleep (main sleep + nap), nap positioning and duration, delay of main sleep, full commitment to night work (including bright light), phase advance and napping in relation to morning work, and modification of sleep strategies depending on the speed and direction of rotation. Thus computer simulations of the efficacy of alternative strategies must sometimes be used. The paper tries several such approaches and finds some possible ways of optimizing sleep. Still, the need for empirical data is emphasized.

75 citations


Patent
27 Mar 1998
TL;DR: In this article, a high resolution calibrator for a sleep mode clock of a mobile station in a wireless communications system is presented, which is used to determine the wake-up time of the mobile station.
Abstract: The present invention concerns a high resolution calibrator for a sleep mode clock of a mobile station in a wireless communications system. When the mobile station is in idle mode (i.e., listening to a paging channel periodically, but otherwise taking no action), the control processor commands the mobile station to enter into sleep mode to minimize power consumption. During sleep mode, the high-frequency reference clock and circuitry clocked by it are turned off. Only the calibrated low-frequency clock remains operating to clock the sleep logic. In a preferred version, the calibrator includes two counters: a first counter which counts up to S*T0 cycles of the super chip rate clock through one data frame, then rolls over to zero, and a second counter which counts cycles of the sleep mode clock. Also included are three registers: a first register which stores a first value CNTSLP which is input from the second counter at the end of a calibration period and subsequently at wake up time; a second register which stores a second value SYSTIME1 which is input from the first counter at the beginning of a calibration period; and a third register which stores a third value SYSTIME2 which is input from the first counter at the end of a calibration period. Wake up time is determined using a relative frequency which is calculated from values stored in the above registers.

42 citations


Patent
17 Jan 1998
TL;DR: In this article, a sleep control circuit is used to set the memory into its low power mode upon detection of the sleep acknowledgement signal emitted by the processor, which is a bus transaction that is detected by the memory controller.
Abstract: An electronic device such as a computer, is provided with a processor responsive to a sleep signal being asserted to emit a sleep acknowledgement signal and enter a low power mode, and a memory which is also settable in a low power mode. The memory is, for example, a DRAM with a self refresh mode. Control of entry of the memory into its low power (or sleep) mode is effected by a sleep control circuit. This circuit sets the memory into its low power mode upon detection of the sleep acknowledgement signal emitted by the processor. Preferably, the sleep control circuit forms part of a memory controller, and the sleep acknowledgement signal is a bus transaction, that is detected by the memory controller.

39 citations


Patent
28 Apr 1998
TL;DR: In this article, the authors propose to extend the service life of a battery by counting nontransmission time of packet data through the use of connection and transiting an operating state of a mobile terminal to a sleep state where the operation relating to data transmission is stopped when the count time exceeds a predetermined count time so as to suppress power consumption of the mobile terminal for a packet communication period.
Abstract: PROBLEM TO BE SOLVED: To extend the service life of a battery by counting non-transmission time of packet data through the use of connection and transiting an operating state of a mobile terminal to a sleep state where the operation relating to data transmission is stopped when the count time exceeds a predetermined count time so as to suppress power consumption of the mobile terminal for a packet communication period. SOLUTION: A mobile terminal PS1 sets a timer on every occurrence of a transmission request of packet data, executes transmission reception processing of the packet data, starts the timer when the transmission reception processing of the packet data is finished and awaits transmission reception of succeeding packet data. In the case that transmission reception of packet data is not conducted over a prescribed period, sleep processing is executed with a gateway GW, sleep notice information is sent to the gateway, the mobile terminal PS1 transits the operating state of itself to the sleep state and interrupts a radio link to set its circuit to an inactive state. COPYRIGHT: (C)1999,JPO

39 citations



Patent
30 Nov 1998
TL;DR: In this paper, a portable computing device (e.g., a notebook type computer) also includes communications features including a pager receiver and a radio frequency modem which are supported by allowing the device, under application program control, to resume operation from a suspend (sleep) state upon receiving of a paging message.
Abstract: A portable computing device (e.g. a notebook type computer) also includes communications features including a pager receiver and a radio frequency modem which are supported by allowing the device, under application program control, to resume operation from a suspend (sleep) state upon receipt of a paging message. Additionally, depending upon the contents of the paging message, various application programs can be automatically launched in the main processor. Under application program control, the device can operate in a background state with for instance the main screen, its backlight and the keyboard powered down, but with the main processor running at full speed for unattended operation. Under application program control in normal or background mode, the device can request that the unit suspend operation without user intervention, for battery power savings during unattended operations. Under application program control, the device can set the state of a status message indicating a message pending or a urgent message waiting. Thus reception of messages during unattended and/or background state operation is communicated to the user without resuming full operation. Additionally, in response to a drop in output voltage from the battery which is the system power supply, transmission power of the RF modem is reduced, thereby allowing RF modem transmissions over the entire battery discharge curve.

36 citations


Patent
David Blair Gilgen1
31 Mar 1998
TL;DR: In this article, a sleep history associated with the location in the application is generated based on previous durations of sleep associated with location in application and the first predetermined time adjusted based upon the sleep history of the application so as to control the number of requests for entry of sleep mode associated with application location.
Abstract: Methods, systems and computer program products are provided which control execution of an application executing on a data processing system by receiving a first request for entry of sleep mode and determining a location in an application requesting entry of sleep mode. Execution of the application is suspended for a first predetermined time period based upon the application and location in the application requesting entry of sleep mode. A sleep history associated with the location in the application may also be generated based on previous durations of sleep associated with the location in the application and the first predetermined time adjusted based upon the sleep history associated with the location in the application so as to control the number of requests for entry of sleep mode associated with the location in the application.

31 citations


Patent
30 Nov 1998
TL;DR: In this article, a portable computing device (e.g., a notebook type computer) also includes communications features including a pager receiver and a radio frequency modem which are supported by allowing the device, under application program control, to resume operation from a suspend (sleep) state upon receiving of a paging message.
Abstract: A portable computing device (e.g. a notebook type computer) also includes communications features including a pager receiver and a radio frequency modem which are supported by allowing the device, under application program control, to resume operation from a suspend (sleep) state upon receipt of a paging message. Additionally, depending upon the contents of the paging message, various application programs can be automatically launched in the main processor. Under application program control, the device can operate in a background state with for instance the main screen, its backlight and the keyboard powered down, but with the main processor running at full speed for unattended operation. Under application program control in normal or background mode, the device can request that the unit suspend operation without user intervention, for battery power savings during unattended operations. Under application program control, the device can set the state of a status message indicating a message pending or a urgent message waiting. Thus reception of messages during unattended and/or background state operation is communicated to the user without resuming full operation. Additionally, in response to a drop in output voltage from the battery which is the system power supply, transmission power of the RF modem is reduced, thereby allowing RF modem transmissions over the entire battery discharge curve.

26 citations


Patent
07 Feb 1998
TL;DR: A sleep pattern timing apparatus for a user to record time before onset of sleep and separately record sleep time to assist in the diagnosis and treatment of sleeping disorders can include a timer for recording awake time and sleep time of the user and preferably a plurality of switches such as a galvanic skin response switch and a tactile plunger-type switch electrically connected to the timer so that the timer records sleep time when at least one switch is released as discussed by the authors.
Abstract: A sleep pattern timing apparatus for a user to record time before onset of sleep and to separately record sleep time to assist in the diagnosis and treatment of sleeping disorders can include a timer for recording awake time and sleep time of the user and preferably a plurality of switches such as a galvanic skin response switch and a tactile plunger-type switch electrically connected to the timer so that the timer records sleep time when at least one switch is released. Using an awake timer subsystem, the apparatus can also begin recording awake time when all switches are concurrently actuated and discontinues recording of awake time when at least one switch is released. A plurality of switches can reduce the opportunity for false actuation. The apparatus can be housed in a hand held housing to fall away when released to further reduce false actuation. The apparatus may be attached to the user with a wrist band for easy retrieval during sleep interruptions.

17 citations


Patent
25 Jun 1998
TL;DR: In this paper, a second task is created and associated with the first task, and a timer is created to expire when a predetermined wait interval is exceeded, when the timer expires, the sleeping second task can be awoken so that a sleeping task is generally prevented from waiting indefinitely for the I/O operations of another task.
Abstract: An apparatus, program product and method of handling tasks that are sleeping and waiting for the completion of I/O operations of other tasks comprises determining a second task which is to await the completion of the I/O operations of a first task, and putting the second task to sleep. A timer is created and associated with the second task. The timer expires when a predetermined wait interval is exceeded. When the timer expires, the sleeping second task is awoken so that a sleeping task is generally prevented from waiting indefinitely for the I/O operations of another task.

Patent
14 Jul 1998
TL;DR: In this paper, a method of controlling the sleep pattern of a baby by monitoring its state of sleep to ensure that it enters rapid eye movement sleep is presented. But, the method is not suitable for infants with a complex brain.
Abstract: A method of controlling the Sleep pattern of a baby by monitoring its state of sleep to ensure that it enters rapid eye movement sleep to ensure proper development of its central nervous system. If the baby does not enter the rapid eye movement sleep phase, then the baby may be frozen and is reawakened and comforted with smiles and laughter before being returned to sleep.

Patent
11 Feb 1998
TL;DR: In this paper, the authors present a control system that keeps a controlled device operating even when a microcomputer of the system overruns during operation of the controlled device, using a watch dog timer and an auxiliary operating circuit.
Abstract: A control system keeps a controlled device operating even when a microcomputer of the system overruns during operation of the controlled device. The control system includes a microcomputer which outputs an operating signal to operate a vehicle-mounted device when the qualifications of operation of the device are met and which outputs a program run signal representing that a control program is being normally executed by the microcomputer and a sleep signal representative of a sleep condition/low power consumption condition of the microcomputer, a watch dog timer which, when the microcomputer fails to output the program run signal, resets the microcomputer and when the microcomputer outputs the sleep signal stops the resetting of the microcomputer, an auxiliary operating circuit which, with a key switch of a motor vehicle kept ON and the sleep signal output from the microcomputer, outputs an auxiliary operating signal of the device subject to meeting of operating qualifications of the device, and a drive circuit which drives the vehicle-mounted device when receiving the operating signal from either one or the microcomputer and the auxiliary operating circuit.

Patent
Yoshikazu Nara1
15 Apr 1998
TL;DR: In this paper, a clock supply apparatus includes a low-rate source clock generating unit for generating a low rate source clock signal, a frequency multiplication/division unit for performing frequency multiplication and division processing for the low rate signal to generate a high-rate clock signal to be utilized in signal processing only during a period in which a sleep signal remains nonactive.
Abstract: A clock supply apparatus includes a low-rate source clock generating unit for generating a low-rate source clock signal, a frequency multiplication/division unit for performing frequency multiplication/division processing for the low-rate source clock signal to generate a high-rate clock signal to be utilized in signal processing only during a period in which a sleep signal remains nonactive, a sleep time measuring unit for measuring a sleep time duration from the moment the sleep signal becomes active and issuing a sleep end signal upon measurement of a predetermined time period, and a sleep control unit for controlling whether the signal processing block is placed in a sleep or non-sleep mode. The sleep control unit decides the end of the sleep period upon detection of the sleep end signal.

Patent
18 Feb 1998
TL;DR: In this paper, a sleep time controller 200 turns a radio telephone into a low power sleep mode for a period based on the timing accuracy of a sleep clock generator 205 and the call processor calculates the enable oscillator time, the warm-up time for restarting one part of RF part and the pre-wake time for restaring the reference timer of the modem.
Abstract: PROBLEM TO BE SOLVED: To provide a method for low power for maintaining exact time at a mobile station while controlling the in/out of slotted paging mode by calculating time to wake up and the other intermediate time corresponding to a wake-up event before turning into a low power sleep state SOLUTION: Based on the control of a call processor, a sleep time controller 200 turns a radio telephone into a low power sleep mode for a period based on the timing accuracy of a sleep clock generator 205 The call processor calculates the enable oscillator time, the warm-up time for restarting one part of RF part and the prewake time for restaring the reference timer of the modem In the sleep mode, the sleep time controller 200 simulates system timing for getting out of the sleep mode to the end of sleep period determined by the call processor COPYRIGHT: (C)1998,JPO

Patent
30 Jun 1998
TL;DR: In this article, a graphic processing part 20 to control a graphics accelerator 30 is provided with a command converting part 21, command transferring part 22, a sleep control part 25, a restarting part 27 to restart the user program 10 in the state of sleep, an ID table 28 to hold ID data of the user programs 10, a virtual factor register 24 to hold information on an operation state of the program 10 and a conversion table 23.
Abstract: PROBLEM TO BE SOLVED: To provide a graphic processing system capable of efficiently executing a graphic plotting processing as balancing with other processing. SOLUTION: A graphic processing part 20 to control a graphics accelerator 30 is provided with a command converting part 21, command transferring part 22, a sleep control part 25 to set a user program 10 as a state of sleep, a restarting part 27 to restart the user program 10 in the state of sleep, an ID table 28 to hold ID data of the user program 10, a virtual factor register 24 to hold information on an operation state of the user program 10 and a conversion table 23. When hardware interruption is received by the sleep control part 25, the user program 10 is specified by referring to the ID table 28, corresponding information in the virtual factor register 24 is set to indicate the state of sleep and when the user program 10 in the state of sleep is restarted by the restarting part 27, the corresponding information in the virtual factor register 24 is set to indicate that the user program 10 is being operated.

Patent
11 Sep 1998
TL;DR: In this article, the authors proposed a system for receiving the supply of power from a power source and operating at a "sleep" mode, where a system clock, a vibration detection means and a means activating the system when the system is at the sleep mode are provided.
Abstract: PROBLEM TO BE SOLVED: To provide a system for receiving the supply of power from a power source and operating at a 'sleep' mode. SOLUTION: A system clock 12, a vibration detection means 13 monitoring the operation of a system clock and a means 16 activating the system when the system is at the 'sleep' mode are provided. When the reactivating means of the system is in the system and the system is switched to the 'sleep' mode, an autonomous time base is immediately formed. When a prescribed time interval terminates, the system is activated again. When the system is not at the 'sleep' mode, it functions differently from the time base and reactivation.


Patent
17 Nov 1998
TL;DR: In this article, the authors proposed a device system which can enable a user to sleep well, by automatically turning of the power switch of electric equipment after detecting that the user gets to sleep.
Abstract: PROBLEM TO BE SOLVED: To provide a device system which can enable a user to sleep well, by automatically turning of the power switch of electric equipment after detecting that the user gets to sleep. SOLUTION: When a person is awake after getting into bed, the person causes relatively large vibrations by making turning over, etc., in the bed. In this fist sleep, however, the person usually gets into a non-REM sleep and does not make any movement. Therefore, a timer circuit 10 is started by turning on a device switch 8 and, when stoppage of vibration is detected (9) until the set time of the circuit 10 elapses, an equipment switch 4 is turned off. However, since the person makes minor vibrations by breathing while the person is in a sound sleep, the movement of the person while the person is awake is distinguished from the breathing of the person by omitting the count of vibrations less than 1 mm/sec .

Patent
23 Jun 1998
TL;DR: In this article, the power state of a computer connected to a monitor having a power control button (sleep button) is controlled by connecting the computer to the monitor by a video cable.
Abstract: PROBLEM TO BE SOLVED: To provide a more convenient means which switches the power state of a computer for a user. SOLUTION: The power state of the computer 8 connected to a monitor 6 having a power control button (sleep button) is controlled. In this case, the computer is connected to the monitor by a video cable 14 and the actuation of the power control button 118 is communicated to the computer 8 through the wire in the video cable. In response to the actuation signal, a system interruption is initiated to call an SMI handler, and the power state of the computer is changed. The power state of the computer includes an ON state, an intermediate power state (like sleep state), and a suspend state (like soft-off state).

Patent
11 May 1998
TL;DR: In this article, a microcontroller enters a sleep state in which it operates in a battery power conservation mode during periods of time when functional activity of the microcontroller is reduced, and it awakens from the sleep state for resumption of activity when such a period ends.
Abstract: The microcontroller enters a sleep state in which it operates in a battery power conservation mode during periods of time when functional activity of the microcontroller is reduced The microcontroller awakens from the sleep state for resumption of activity when such a period ends Timing to the LCD is decoupled from the microcontroller^s own internal clock when the independent internal on-chip clock , which may be an RC oscillator , is selected by the user of the device This allows the chip to continue to drive the LCD display even though the microcontroller^s inernal clock has stopped during the sleep

Patent
22 May 1998
TL;DR: In this paper, the authors propose a sleep function to enable the simple setting of time to turn off or reduce the output to a lamp, etc., by setting the time to stop the power supply to or perform the control of a specific part.
Abstract: PROBLEM TO BE SOLVED: To enable the simple setting of time to turn off or to reduce the output to a lamp, etc., by setting the time to stop the power supply to or perform the control of a specific part. SOLUTION: In the case that a driving part which lights the light source lamp 4 of a detector is controlled by a control part 2 which executes the time program of the whole, a sleep setting part 6 sets the time to turn off the lamp 4 to the control part 2. By enabling the OFF setting of the lamp 4 to be performed in a sleep function, it is possible to improve operability and to prevent the exhaustion of the lamp 4. When the sleep function is set, if time a program is executed, the lamp 4 is turned off at the time when the program is completed. In addition, it is possible to apply this sleep function not only for turning off the lamp 4 but also for reducing output such as excitation and operating speed of a display and motor.


01 Jan 1998
TL;DR: In this article, the authors tried several such approaches and found some possible ways of optimizing sleep, but the need for empirical data is emphasized and computer simulations of the efficacy of alternative strategies must sometimes be used.
Abstract: about optimal sleep- wake patterns - except for the ones commonly used but not evaluated, for example, extension of morning sleep after night work, split sleep (main sleep + nap), nap positioning and duration, delay of main sleep, full commitment to night work (including bright light), phase advance and napping in relation to morning work, and modification of sleep strategies depending on the speed and direction of rotation. Thus computer simulations of the efficacy of alternative strategies must sometimes be used. The paper tries several such approaches and finds some possible ways of optimizing sleep. Still, the need for empirical data is emphasized.

Patent
24 Apr 1998
TL;DR: In this article, a radio (10) executes a method (100) for entering and exiting a halt status, where a control unit (18) and an internal timing unit (16) have a control logic (32), a status register (46), a counter (30), and a clock source (37).
Abstract: A radio (10) executes a method (100) for entering and exiting a halt status. Radio (10) has a control unit (18) and an internal timing unit (16). The timing unit (16) has execution logic (32), a status register (46) a counter (30) and a clock source (37). The control unit (18) writes instructions I(i) and their execution times T(i) to a memory (42) within the execution logic (32). One of these instructions is a 'SWITCH CLOCK' instruction causing the timing unit (16) to switch between clock signals. One of the instructions is 'HALT COUNTER' causing the radio (10) to enter a halt state. The radio (10) can be synchronized to the end of a first communication frame received by it after exiting a halt state.