Showing papers on "Sleep (system call) published in 2008"

Therapy program selection

Abstract: A therapy program is selected based on a patient state, where the patient state comprises at least one of a movement state, sleep state or speech state. In this way, therapy delivery is tailored to the patient state, which may include specific patient symptoms. The therapy program is selected from a plurality of stored therapy programs that comprise therapy programs associated with a respective one at least two of the movement, sleep, and speech states. Techniques for determining a patient state include receiving volitional patient input or detecting biosignals generated within the patient's brain. The biosignals are nonsymptomatic and may be incidental to the movement, sleep, and speech states or generated in response to volitional patient input.

Rethinking Sleep Analysis Comment on the AASM Manual for the Scoring of Sleep and Associated Events

Abstract: Visual sleep scoring is the obligatory reference for sleep analysis. An essential step in sleep scoring is sleep staging. This technique was first described in 1937 and later adapted 3 times: first, in 1957, after the detection of rapid eye movement (REM) sleep, when electrooculography (EOG) was added; second, in 1968, when sleep staging was standardized and electromyography (EMG) was added; and third, in 2007, to integrate accumulated knowledge from sleep science, adding arousals and respiratory, cardiac, and movement events. In spite of the dramatic changes that have taken place in recording and storing techniques, sleep staging has undergone surprisingly few changes. The argument of the present comment is that sleep staging was appropriate as long as sleep biosignals were recorded in the analog mode as curves on paper, whereas this staging may be insufficient for digitally recorded and stored sleep data. Limitations of sleep staging are critically discussed and alternative strategies of sleep analysis are emphasized.

Using DTX and DRX in a wireless communication system

Abstract: Systems, methodologies, and devices are described that can facilitate reducing power consumption associated with mobile devices. A mobile device can utilize a sleep mode controller that can facilitate selecting and/or switching to a desired sleep mode based in part on predefined sleep mode criteria. The sleep modes can include a non-sleep mode, light sleep mode, and/or deep sleep mode. The mobile device can employ an analyzer to evaluate information related to explicit signals, implicit signals, and/or the current sleep mode to determine whether a condition is met based in part on the predefined sleep mode criteria such that a transition to a different sleep mode is to be performed. If such a condition is met, the sleep mode controller can facilitate transitioning from the current sleep mode to a different sleep mode to facilitate reducing power consumption by the mobile device.

Methods and devices for reducing power consumption in a passive optical network while maintaining service continuity

Abstract: The present invention discloses methods for reducing power consumption in a PON while maintaining service continuity, the method including the steps of: providing an OLT operationally connected to at least one ONU; triggering a sleep request for at least one requesting ONU; upon receiving a sleep acknowledgement, activating a sleep mode for at least one requesting ONU according to a sleep period designated in the sleep request; and terminating the sleep mode according to the sleep period. Preferably, the sleep acknowledgement is transmitted from the OLT to the requesting ONU. Preferably, the sleep period is executed by a sleep command in the sleep acknowledgement. Preferably, the method further includes the step of: upon completion of the sleep period, transmitting buffered data traffic from the OLT to a sleeping ONU. Preferably, the step of transmitting is performed without the sleeping ONU being re-registered and without causing packet reordering.

Sleep stage detection

Abstract: Therapy delivery to a patient may be controlled based on a determined sleep stage of the patient. In examples, the sleep stage may be determined based on a frequency characteristic of a biosignal indicative of brain activity of the patient. A frequency characteristic may include, for example, a power level within one or more frequency bands of the biosignal, a ratio of the power level in two or more frequency bands, or a pattern in the power level of one or more frequency bands over time. A therapy program may be selected or modified based on the sleep stage determination. Therapy may be delivered during the sleep stage according to the selected or modified therapy program. In some examples, therapy delivery may be controlled after making separate determinations of a sleep stage based on the biosignal and another physiological parameter, and confirming that the sleep stage determinations are consistent.

Sleep to find your way: The role of sleep in the consolidation of memory for navigation in humans

Abstract: Although a large body of evidence indicates that sleep plays an important role in learning and memory processes, the actual existence of a sleep-dependent spatial memory consolidation has been not firmly established. Here, by using a computerized 3D virtual navigation tool, we were able to show that topographical orientation in humans largely benefits from sleep after learning, while 10 h of wakefulness during the daytime do not exert similar beneficial effects. In particular, navigation performance enhancement needs sleep in the first post-training night, and no further improvements were seen after a second night of sleep. On the other hand, sleep deprivation hinders any performance enhancement and exerts a proactive disruption of spatial memory consolidation, since recovery sleep do not revert its effects. Spatial memory performance does not benefit from the simple passage of time, and a period of wakefulness between learning and sleep does not seem to have the role of stabilizing memory traces. In conclusion, our results indicate that spatial performance improvement is observed only when learning is followed by a period of sleep, regardless of the retention interval length.

Monitoring sleep stages to determine optimal arousal times and to alert an individual to negative states of wakefulness

Abstract: A system and method for monitoring sleep stages to determine optimal arousal times and to alert an individual to negative states of wakefulness. In an embodiment, a device receives pressure data from at least one pressure sensor, where the pressure sensor is associated with furniture used for an individual to sleep. The device uses the pressure data to determine a sleep stage for the individual. The sleep stage is used to determine whether it is an optimal arousal time for the individual. The device sends an indication to not wake the individual if it is not the optimal arousal time for the individual. Other embodiments are described and claimed.

Arrangement and method to wake up a sleeping subject at an advantageous time instant associated with natural arousal

Abstract: Intelligent alarm clock arrangement adapted into an electric device like a mobile cell phone or a small personal computer (PDA) and utilizing the microphone, loudspeaker or other alarming device, memory unit, processor and timer feature thereof. The apparatus is located near to the sleeping subject so as to sample and analyse the statistical properties of the sound signals produced by the movements of the sleeping subject and to classify the sleep states according to the analyzed signals into a peaceful calm deep sleep, a light sleep with arousals and awake periods associated with the movements. An alarm wakes up the subject during a pre-programmed time window, if there are arousals, awake state and movements present at that time to induce the awakening at a biologically advantageous instant. Instead of the local alarm function, the device may perform a remote alarm using a call or sending a message to a pre-programmed phone number when the awakening of the sleeping subject is detected. The sensitivity and specificity of the detection relative to the movements may be increased by applying a proper physical material.

Transfer then sleep

Abstract: A second communication device is detected in proximity to a first communication device engaged in a call. A substantially uninterrupted transfer of the call is provided from the first communication device to the second communication device. At least a part of the first communication device is placed into a sleep mode in response to transfer of the call to the second communication device.

System and Method for Monitoring Information Related to Sleep

Abstract: A system configured to monitor ambient illumination experienced by a subject. In one embodiment, the system comprises an illumination sensor, a timer, and a storage module. The illumination sensor is configured to monitor an intensity of ambient illumination within two or more wavelength ranges by generating one or more output signals that convey information related to the intensity of ambient illumination within the two or more wavelength ranges. The timer is configured to indicate the passage of periods of time. The storage module is configured to store information related to the intensity of ambient illumination within the two or more wavelength ranges, as conveyed by the one or more output signals, for individual periods of time. The system is portable to be carried by the subject.

Therapy program selection based on patient state

Abstract: A therapy program is selected based on a patient state, where the patient state comprises at least one of a movement state, sleep state or speech state. In this way, therapy delivery is tailored to the patient state, which may include specific patient symptoms. The therapy program is selected from a plurality of stored therapy programs that comprise therapy programs associated with a respective one at least two of the movement, sleep, and speech states. Techniques for determining a patient state include receiving volitional patient input or detecting biosignals generated within the patient's brain. The biosignals are nonsymptomatic and may be incidental to the movement, sleep, and speech states or generated in response to volitional patient input.

Sleep mode control for real-time services in broadband wireless access communication systems

Abstract: Consideration of Quality of Service is taken into account during the establishment of a sleep cycle in a mobile station providing real-time services. Upon the mobile station's identification of a need for a real-time service to enter into sleep mode, a request conveying that need is sent to the base station. The base station replies with a start frame number and other sleep parameters. Thereafter the mobile station enters sleep mode comprising sleep intervals interleaved with listening intervals. To prevent transmission packets from being buffered at the mobile station for an excessive period of time due to attempts to transmit packets to the base station during a sleep interval, the length of the sleep interval is set so as not to exceed the maximum latency value reflecting the QoS of the real-time service negotiated during establishment of the real-time services.

Performance analysis of the IEEE 802.16e sleep mode for correlated downlink traffic

Abstract: In this paper, we evaluate the performance of the IEEE 802.16e sleep mode mechanism in wireless access networks. This mechanism reduces the energy consumption of a mobile station (MS) by allowing it to turn off its radio interface (sleep mode) when there is no traffic present at its serving base station (BS). After a sleep period expires, the MS briefly checks the BS for data packets and switches off for the duration of another sleep period if none are available. Specifically for IEEE 802.16e, each additional sleep period doubles in length, up to a certain maximum. Clearly, the sleep mode mechanism can extend the battery life of the MS considerably, but also increases the delay at the BS buffer. For the performance analysis, we use a discrete-time queueing model with general service times and multiple server vacations. The vacations represent the sleep periods and have a length depending on the number of preceding vacations. Unlike previous studies, we take the (short-range) traffic correlation into account by assuming a D-BMAP arrival process, i.e. the distribution of the number of packet arrivals per slot is modulated by the transitions in a Markov chain with N background states. As results, we obtain the distribution of the number of packets in the queue at various sets of time epochs, the distribution of the packet delay and the antenna activity rate. We apply these results to the IEEE 802.16e sleep mode mechanism with correlated downlink traffic. By means of some examples, we show the influence of both the configuration parameters and the traffic correlation on the delay and the energy consumption.

Adaptive method for system re-acquisition in power saving mode operation in a mobile wiMAX system

Abstract: Methods and apparatus for re-acquiring a WiMAX network after a relatively long power saving mode (e.g., sleep or idle mode) using a “pre-wakeup” scheme are provided. According to this pre-wakeup scheme, a mobile station (MS) may power up receiving circuitry to search for the current channel or, if unsuccessful, a neighbor channel. After a successful network search during sleep mode, the MS may return to sleep for the remainder of the sleep window until the circuitry is powered up a second time to wakeup and then listen for an expected message. By pre-waking up and searching before waking up for the expected message, the MS may counteract the effects of the potential error in the local oscillator frequency accumulated during the long sleep mode. In this manner, the message miss rate may be reduced, thereby saving power and extending the time in which the MS may operate between battery rechargings.

A brief behavior therapy administered by correspondence improves sleep and sleep‐related behavior in poor sleepers

Abstract: This study examined the long-term effects of a brief behavioral intervention for sleep improvement. The program was designed as a complete self-help approach by correspondence, and consisted of self-assessments of sleep-related behavior, target-setting for behavior change, an educational booklet, self-monitoring of the behaviors for one month and reinforcement. The participants of the program at a Japanese worksite replied for a one-year followed up survey. Forty-seven poor sleepers whose sleep onset latency was 30 min or more and/or sleep efficiency was less than 85% were analyzed. Eight sleep parameters and nine sleep-related behaviors were evaluated using questionnaires at baseline, post-intervention and follow-up. At one year, total sleep time increased by 27 min, sleep onset latency shortened by 17.5 min and sleep efficiency improved by 6.9 points. Desirable changes were obtained in 4 sleep-related behavior including not being active before bedtime, not working or watching TV in the bedroom, not oversleeping on holidays and having a relaxed bath time. These results suggest that this brief behavioral intervention could improve sleep quality through the modification of sleep-related behavior.

Apparatus and method of managing quality of sleep

Abstract: An apparatus of managing quality of sleep includes a weight sensor unit including a plurality of pressure sensors, which detect pressures in response to a presence and a movement of a user; an environment sensor including multiple sensors, which detect an environment surrounding the user in a sleep; and a controller for collecting and analyzing information, detected by the weight sensor unit and the environment sensor unit, and classifying and managing the analyzed information according to quality of sleep. The apparatus provides an optimized sleep environment adequate for a subject by learning various sleep environments, and provides a comfortable and cozy sleep environment to the subject to restore energy and be refreshed, so that the subject can enjoy energetic and effective daytime life.

Method of improving sleep disordered breathing

Abstract: A diaphragm pacing stimulatory method and a system to implement the method are provided to improve respiratory function and the quality of sleep in patients whose sleep is compromised by poor respiration. The diaphragm pacing method includes adaptations that make it particularly compatible with the onset of sleep and sustaining sleep. Embodiments of the method are operated independently of breathing effort the patient may make during sleep. Patients for whom the invention is appropriate include those with a neuromuscular disease, such as amyotrophic lateral sclerosis (ALS). System elements include an external electrical stimulator coupled to one or more implanted electrodes that stimulate diaphragm contraction. The system and method provide for a pacing of the diaphragm, improved breathing, and improved sleep. Features of improved sleep include longer sleep time, an increased amount of REM sleep, and fewer episodes of wakefulness and restlessness.

IT system behavior measurement and analysis system and method thereof

Abstract: When a process sleep event, a process wake-up event, a process save event, and a process resume event occur in an IT system having a multiprocessor configuration, a tracer respectively generates sleep event data, wake-up event data, save event data, and resume event data and records them as trace data in a trace buffer. The analysis unit generates an analysis result by referring to the trace data to accumulate a number of times of execution of the process wake-up process and a first time as a time from the process save event to the process wake-up event or to the process resume event with respect to a plurality of processes to be executed. When a contention for a shared resource occurs, the process wake-up process is repeatedly executed among relevant processes. For this reason, based on the analysis result, a possibility can be presented that the shared resource contention occurs in the IT system.

Sleep: a good investment in health and safety

Abstract: Sleep management is critical to both good health and safety. Most people do not know how much sleep is needed and place themselves and sometime others at risk for medical problems and increased risk for injuries or fatal accidents. Sleep need is discussed and the amount of sleep required as a function of age is provided. Agriculture is a high-risk industry with many injury-related or fatal accidents. SLEEP Model, a Web-based simulation model, was used to predict increase in odds ratio for injuries for farmers and other professionals who tend to work with a buildup of sleep debt because of the nature of their work. Results are given for working the day after a night of no sleep with and without use of caffeine and for a gradual buildup of sleep debt for daily sleep amounts of 0, 2, 4, 5, and 5.5 hours of sleep for a 58-year-old person with predicted sleep need of 6.2 hours per day. Results were also compared to some measurements reported in the literature. Odds ratio of about 10 times normal for average of caffeine and non-caffeine use are associated with working a day after no sleep and no previous sleep debt or with a gradual buildup of sleep debt typical of farmers involved in planting and harvesting seasons. Generally, caffeine use can reduce risks by about 70 times but may have little benefit for a night of no sleep after a buildup of severe sleep debt.

Sleep improvement device and program

Abstract: PROBLEM TO BE SOLVED: To provide a sleep improvement device capable of improving sleep based on an improvement that a user can easily perform. SOLUTION: This sleep improvement device includes a sleep information acquisition section 11 that acquires sleep information from a plurality of sensors, an information processing block 30 that selects information suited to improve the situation of sleep, out of advise information of database 12 based on the sleep information and sets one having a lowest difficulty level for the user out of the selections, as an output target, and a display control section 23 that outputs the advice information, or the output target, to a monitor 4. COPYRIGHT: (C)2010,JPO&INPIT

Device for inducing better sleep

Abstract: A device for inducing better sleep embedded with music having a tempo of about sixty to about eighty beats-per-minute. Listening to music with a tempo of approximately 60 to approximately 80 beats-per-minute results in significantly better sleep quality, better perceived sleep quality, longer sleep duration and greater sleep efficiency. Embodiments of the device can include, among other things, an alarm clock, a pillow, mobile, sleep mask, crib or a stuffed toy for use with children. Embodiments of the device including a travel clock, travel pillow, or mobile device allowing the device to be easily transported for purposes of inducing better sleep during travel are also contemplated.

Using traffic patterns to improve sleep mode efficiency in a radio handset

Abstract: Disclosed is a method of using observed traffic pattern data to improve sleep mode efficiency in a radio handset. The radio handset determines quality of service (QoS) requirements of an application currently executing on the radio handset and selects a pre-defined sleep mode mask from among a plurality of pre-defined sleep mode masks wherein the selected pre-defined sleep mode mask provides the closest available match in terms of sleep/listen pattern to the QoS requirements. The traffic pattern data between the radio handset and a serving basestation is observed while under the initial sleep/listen pattern of the selected pre-defined sleep mode mask or the reactivated sleep/listen pattern after sleep mode deactivation. An alternate sleep mode mask is created based on the observed traffic pattern data between the radio handset and the serving base station wherein the alternate sleep/listen pattern is better suited to the actual traffic pattern than the initial sleep/listen pattern of the selected pre-defined sleep mode mask or the reactivated sleep/listen pattern after sleep mode deactivation.

Wireless communication system

Abstract: A sleep length calculation unit 410 of a terminal calculates a sleep length based on what is contained in a PLCP header of a frame, and sets the calculated length on a timer 430 An address detection unit 420 of the terminal detects a destination address from inside a MAC header of the frame to see if this frame is destined for another terminal If the frame is found destined for another terminal, then this terminal gives a power supply unit 180 an instruction to start sleeping while causing the timer 430 to start counting time When the sleep length is found to have elapsed on the timer 430 , the terminal gives the power supply unit 180 an instruction to stop sleeping If what is contained in the PLCP header or MAC header is not deemed reliable, then a sleep inhibit determination unit 440 inhibits the power supply unit 180 from going to sleep The structure allows a wireless communication system to effect a transition into power-saving mode upon acquiring necessary information, without making changes to existing standards

Information processor and system state control method

Abstract: PROBLEM TO BE SOLVED: To make it possible to execute a shift from a standby state to a dormant state efficiently with power consumption suppressed. SOLUTION: Upon occurrence of a sleep event, system information is stored in an HDD 113 and then a system state is shifted into a standby state. If a wake-up event occurs during the standby state, the system state is returned from the standby state to an operating state with the HDD 113 held in an inactive state. Then a CPU 111 determines whether or not an occurrence cause of the wake-up event is the occurrence of an alarm signal indicating shifting to the dormant state. If the occurrence cause of the wake-up event is the occurrence of the alarm signal, power supply is halted to each of almost all modules in operation, including the CPU 111 and a main memory 112, and the system state is shifted into the dormant state. COPYRIGHT: (C)2008,JPO&INPIT

Adaptive sleep area

Abstract: Techniques for determining a sleep area of a sleep group in a wireless communications network based on a value of a dynamically changing communication characteristic. In various embodiments, a sleep area may be determined to reduce resource use in a wireless communication network supporting a sleep mode of a mobile station. In one embodiment, the sleep area may be determined based on a speed of a mobile station.

Method and apparatus for activating sleep mode

Abstract: An integrated circuit includes a circuit including a plurality of functional blocks, a sensor associated with one of the plurality of functional blocks for sensing a state of activity thereof, and a sleep switch receiving an output from the sensor and placing the associated functional block in a sleep state in response to the sensed state of activity.

Automatic home care system for monitoring HR/RR during sleep

Abstract: This paper described an automatic home care system for monitoring HR/RR during sleep. Pressure signal is measured with a completely unconstrained pressure sensor beneath a pillow; then the signal is digitalized and the data are transmitted to a remote server using TCP/IP via a netbox. The data are processed and analyzed with a wavelet-based algorithm to obtain the heart rate and respiration rhythm during sleep. Through analyzing 180 days' data obtained from a female subject, it was found that this system can be used for daily monitoring heart rate and respiration rhythm during sleep and evaluating the quality of sleep at home.

Information processor and control method therefor

Abstract: PROBLEM TO BE SOLVED: To suppress power consumption when returning a system to an operation state from a sleep state. SOLUTION: In this control method for an information processor, a register 106A of a south bridge 106 is referred to, and it is distinguished whether it is return starting from an S4 sleep (hibernation) or not. When it is decided that it is the starting by the return from the S4 sleep, a BIOS (Basic Input Output System) does not issue a command for commanding spinup of a magnetic disk 202. A boot sector is read from a nonvolatile memory 203 of an HDD 126, and control is transfered to an operating system. COPYRIGHT: (C)2008,JPO&INPIT

Wake-up timer with periodic recalibration

Abstract: A power saving sleep timer has a first clock and a second clock having greater frequency and temporal stability than the first clock. The second clock has an associated second clock period value which is accumulated once for each said second clock interval during one or more first clock periods, thereby forming a calibrated period value. During an operational interval, the calibrated period value is accumulated once per first clock interval until the accumulated value is equal or greater than a sleep time value, after which a power-up output is asserted.

Re-programming media flow phone using speed channel switch time through sleep time line

Abstract: A multicasts wireless telecommunication system to reprogram preset sleep time line to earlier point to wake up ASIC at right moment to obtain new channel OIS to prevent screen in the device display from going black, and save power by saving extra wakeup time and extra going to sleep cycles.