90results about How to "Extended sleep time" patented technology

The invention relates to an independent self-adaptive adjusting method for duty ratio of a sensor node based on an IEEE 802.15.4 protocol. When the flow rate of the node is less, the dormancy time of the node is prolonged to further reduce power consumption of the node; simultaneously, the receiving frequency of a beacon frame of the node is reduced to further lessen corresponding receive power consumption of the node; when the flow rate of the node is larger, the dormancy time of the node is independently shortened to ensure the performance of end-to-end time delay of the node; and simultaneously, the number of the node in a competitive channel at the same time is reduced to further improve the thuoughput performance. The node simultaneously adopts a high-efficiency energy dormancy mechanism so that the node carries out dormancy ahead of an active phase within a cycle, thereby further saving power consumption of the node. The method ensures high-efficiency energy of the node so that the network power consumption and the end-to-end time delay obtain good balance under different network loading conditions and a network coordinator independently and simultaneously carries out self-adaptive adjustment on the duty ratio of each node and an alternate cycle of a beaconing according to data frame sending queue information received from each node.

The invention relates to a distributed self-adapting industrial wireless network energy saving method for reducing the energy consumption of nodes in industrial wireless monitoring network, belonging to industrial wireless communication technology field. The energy saving project comprises: sorting all devices in the whole wireless network into node device (ND) for acquiring and sending data, energy manager for gathering and transmitting data and managing the energy consumption of the node devices, and gateway (GW) for communicating between the wireless network users and transferring monitoring data and energy managing data. By using energy manager to control the energy consumption of each node, the method provided in the invention enable the industrial wireless network to prolong network life cycle, adjust the dormancy time of the node self-adaptingly and enlarge the information amount of wireless messages, consequently, reduces the energy consumption of nodes in industrial wireless monitoring network and furthest reduces communication energy consumption.

Disclosed are a power saving method and a device for a WiFi access point apparatus belonging to the technical field of wireless communication. In the present invention, when reaching a preset maximal connection number of the wireless access point apparatus, changing the working mode of the present wireless access point apparatus, extending the beacon frame transmission period of the wireless access point apparatus, transmitting the beacon frame with a maximal power used by wireless terminals during communications, wherein the wireless terminals are connected with the wireless access point apparatus, stopping responding to any messages transmitted from unconnected wireless terminals, and on the basis of wireless local network channel bandwidth distributed to the wireless terminals connected with the wireless access point or wide area network communication bandwidth obtained by the wireless access point apparatus, determining the sleep time of the wireless local network communication module of the wireless access point apparatus, so as to reduce the power consumption and extend the use time of portable wireless access point apparatus.

The invention discloses a wireless communication device and a power saving method thereof and an encapsulation packet filter method. The wireless communication device comprises a Modem processor for connecting a wireless network system to transceive encapsulation packet data, and a data processor for executing an application program to perform network service through the wireless network system. When the data processor is to enter a dormant state, the data processor generates network information related with the application program, for example, a communication port or an IP, and the Modem processor filters the encapsulation packet data according to the network information; and when the encapsulation packet data accords with the network information, the Modem processor awakens the data processor to process the encapsulation packet data, thus prolonging the dormancy time of the data processor and further reducing the power consumption of the wireless communication device.

The invention relates to a low-energy consumption sleeping monitoring method synchronous relative to time of a wireless sensor network. The traditional method is high in energy consumption. The method in the invention comprises the following steps: in the stage of creating a relative synchronization table at a new node, broadcasting addition request network packets by the new node firstly to obtain synchronizing information of a neighbourhood node; then estimating clock skew, and linearly fitting multigroup of synchronization information of the neighbourhood node to estimate clock drift; and finally saving the sleeping period of the neighbourhood node, the estimated clock skew and the clock drift into the relative synchronization table; and in the stage of prediction and transmission of data packets of the node, realizing relative synchronization with a target node by the node according to the created relative synchronization table, then predicting the waking time at the next time according to the sleeping period of the node, setting a transmission timer, and finally transmitting data packets by a short permeable when the transmission timer is triggered. According to the invention, the energy overhead for sending the data packets by the node can be saved, and the idle time of a transmitting node is reduced, and the sleeping time of the transmitting node is increased.

The invention discloses a heartbeat detection method of a wireless sensor network and an apparatus thereof. The method comprises the following steps that a master control node sends a broadcast beacon and determines whether a backbone node time slot or a sensor node time slot arrives; when the backbone node time slot arrives, the master control node sends first heartbeat inquiry information to a backbone node; after receiving the first heartbeat inquiry information, the backbone node sends first heartbeat reply information including a self-health state value H and a communication pressure value P; the master control node calculates a heartbeat service value F according to the health state value H and the communication pressure value P and dynamically adjusts a first heartbeat period according to the heartbeat service value F. By using the heartbeat detection method of the wireless sensor network and the apparatus, a backbone network and a microsensor network heartbeat period are dynamically adjusted so as to adapt to characteristics of low power dissipation and long dormancy time of an electric power wireless sensor network. A node fault detection speed and detection accuracy are increased.

The invention discloses a rosa roxburghii enzyme and a preparation method thereof. The rosa roxburghii enzyme is prepared from raw materials in parts by weight as follows: 40-60 parts of rosa roxburghii and 16-40 parts of other plant food materials. The preparation viewpoint that a conventional enzyme adopts a formula using a single raw material is broken through, a formula using multiple raw materials is adopted, accordingly, the enzyme can be supplemented for human bodies through drinking of the enzyme, substances required by the human bodies at the moment can also be supplemented while the enzyme is supplemented, and the substances can be substances prompting the enzyme capability and can also be substances required by the human bodies after the reaction.

The invention discloses a wireless communication device and an electricity saving method thereof. The wireless communication device comprises a modem processor and a data processor, wherein the modem processor is electrically connected to a wireless network system so as to receive and send network packets. When the data processor is in a sleeping mode, an internet protocol (IP) packet protocol module of the modem processor unpacks the received network packets to acquire packet data. The modem processor wakes the data processor up if determining that the packet data need to be processed by the data processor; and otherwise, the data processor remains in the sleeping mode. Accordingly, the sleeping time of the data processor is prolonged and electricity is saved.

The invention discloses a body area network energy-saving method based on sparse representation and compressed sensing. The method specifically includes: performing normal and abnormal classification and coding on sample data in an existed database and establishing an over-complete dictionary D, performing dimension reduction processing on a test sample y and the dictionary D by employing a sub-Gaussian random matrix, calculating the sparse representation sparsity shown in the description of a compression signal shown in the description by employing a sparse representation-based algorithm, then determining whether the test sample is an effective signal shown in the description, if not, directly filtering the signal and re-starting sampling by a node, if yes, calculating the signal minimum residual error position i through residual error identification, performing marking and checking with the database, directly entering a sleep state by the node if the signal is a normal signal, transmitting the compression signal shown in the description to a central base station for node reconstruction by the node if the signal is an abnormal signal, and finally sending a reconstruction signal y' to a remote medical center for diagnosis and analysis and taking first aid measures. According to the method, the body area network node sleep energy saving and data compression transmission energy saving are realized, and the energy consumption of the body area network is reduced.

The invention provides a multi-band fusion-based power distribution and utilization telephonic communication wireless Ad-Hoc network method. The method comprises the steps of establishing a multi-band fusion-based wireless Ad-Hoc network protocol model, expanding the standard-frame format of an adaptation layer in the multi-band fusion-based wireless Ad-Hoc network protocol model, adding the scanning information and the real-time indication scheduling information for scheduling the multi-band and multi-channel transmission and service data flow, and conducting the multi-band adaptation for the multi-band fusion-based wireless Ad-Hoc network. According to the method, the characteristics of wide geographical distribution of intelligent power distribution and utilization, multiple measurement monitoring points, high communication reliability and high transmission bandwidth are realized. Meanwhile, the combined scheduling of 230M/433M/470M/780MHz sub-networks and a backbone network is realized based on the cross-band networking technology. The communication is enabled based on a multi-band- networked multi-mode-access collaborative communication mechanism. Therefore, the system provides novel power wireless communication techniques for realizing flexible communication transmission and networking modes, and is applicable to complex application environments and multi-service loading requirements. Based on the method, the autonomous self-healing networking communication is realized. Therefore, a novel communication means is provided for the smart grid.

The present invention provides a sleep quality improving solid drink composition. The composition is prepared from the following raw materials in parts by weight: 0.5-5 parts of alpha-lactalbumin, 0.5-5 parts of a casein hydrolyzate, 0.5-5 parts of gamma-aminobutyric acid, 29-65 parts of dairy products and 26-69.5 parts of other auxiliary materials. The solid drink composition contains high-quality proteins, is good in mouthfeel and convenient for taking, has effects of improving sleep quality in a regular consumption, and is particularly suitable for a consumption by people suffering from sleeping problems.

The invention discloses a neighbor discovering method of IEEE802.15.4e (Institute of Electrical and Electric Engineer 802.15.4e) network. The method comprises the following steps of: S1, designing a message monitoring algorithm E-OPT, starting to monitor a message; S2, when monitoring the first message, recording the message type and the time for message detection, and forecasting the range of beacon frame order b; S3, forecasting a recently possible time slot T of the beacon frame; S4, sleeping until the time slot, at the time slot T, monitoring the channel appointed by the E-OPT algorithm, if the beacon frame is not monitored, removing the current b value, returning back to the step S3, if the beacon frame is monitored, stopping, if the total neighbor discovering time is greater than a certain value tmax, judging that neighboring discovery is failed. In the method, based on the relation between the normal message and the beacon frame in the network, the position of the beacon frame is forecasted by monitoring the normal message, thus monitoring becomes easier; and meanwhile, the time for monitoring the normal message is shorter, so that the beacon frame can be monitored just by limited times of monitoring, energy waste caused by aimless monitoring is reduced, and monitoring energy is saved more.

The invention relates to the technical field of low-power wireless communication, in particular to a low-power wake-up method combining detection and scheduling mechanism, comprising the following steps: when a master node needs to wake up a slave node, encoding to generate a series of continuous bit streams with self-correlation characteristics, separating the series of bit streams by equal length and forming segments; a wake-up data segment is formed by inserting a time synchronization message at that start position of each segment and the end position of the last segment, and the wake-up data packet is for by arranging and connecting the wake-up data segments. The master node modulates the wake-up data packet into a wireless signal and continuously sends it, and the slave node periodically starts the wireless receiving function under the sleep mode, and decodes the received wireless data. The invention increases the sleep time through the detection and scheduling method, and avoidsthe energy consumption caused by the premature wake-up of the node.

The invention discloses ginseng root and common jujube seed nerve calming and immunity enhancing health maintenance tea and a preparation method thereof. The health maintenance tea comprises ginseng roots, common jujube seeds, Siberian solomonseal rhizomes, palmleaf raspberry fruits, barbary wolfberry fruits, Chinese dates, ural licorice roots, lobed kudzuvine roots, cape jasmine fruits, Mongoliandandelion herbs, fleshfingered citron fruits and Indian bread. According to the tea, by the aid of synergistic effects of components such as the ginseng roots and the common jujube seeds, the functions of invigorating primordial energy, restoring pulse, relieving depletion, calming nerve and increasing intelligence of the ginseng roots are furthest played, the functions of nourishing heart, calming nerve, calming and hypnotizing of the common jujube seeds are furthest played, so that the health maintenance tea has good calming and hypnotizing functions and good effects on neurasthenia, insomnia and headache, sleep is effectively facilitated, sleeping time is prolonged, sleep quality is improved, the health maintenance tea has a physiological health care function of preventing and treatinginsomnia and does not have toxic and side effects on human bodies, dependence is avoided, medicinal and edible homologies are achieved, the health maintenance tea has the effects of nourishing spleen, tonifying qi, nourishing blood and calming nerve, palpitation and neurasthenia are relieved, human memory can be effectively enhanced, senility can be effectively resisted, and human immunity is enhanced.

The present disclosure relates to a method for antenna calibration, includes predicting a predicted phase difference at a predetermined number of predicted time points within a next measurement time interval based on a time value at a previous measurement time point, a time value at a current measurement time point, an antenna phase difference measured at the previous measurement time point, and an antenna phase difference measured at the current measurement time point; and outputting a predicted phase difference at each predicted point in time. The present disclosure also relates to an apparatus for antenna calibration. With the prediction process of the present disclosure, the AC update interval can be significantly expanded, thereby reducing the negative impact of AC.

The invention is directed to a wireless communication device that includes: a radio unit configured to provide two-way wireless communications; a host processing unit; and a sleep mode unit, coupled to the host processing unit and the radio unit, configured to control a sleep time of the host processing unit and the radio unit, wherein if the radio unit does not receive a signal from the access point that associates the wireless communication device with the access point, the sleep unit increases the sleep time of the host processing unit and the radio unit after each set of one or more failed attempts by the wireless communication device to associate with the access point.

The invention provides an underwater sound awakening circuit. A receiving transducer converts the sound signal into an electric signal; the circuit works according to a method which comprises the following steps: inputting the electric signal into a wake-up circuit module, amplifying the electric signal through a pre-amplification circuit, filtering out a signal with a target bandwidth through a band-pass filter, demodulating the signal by using a detector, dividing the demodulated wake-up signal into two paths, outputting one path to a CPU of a node, and performing sampling and digitalizing through analog-to-digital conversion; and judging whether the other path of signal is a wake-up signal through a detector. According to the invention, an on-demand dormancy mechanism is realized; the data-free active time is reduced; according to the circuit, the dormancy time of the nodes is prolonged, so that the node energy consumption of a communication system can be reduced, the chip cost is relatively low, the implementation cost of a circuit is reduced, the underwater nodes can be awakened under different transmission distances, and the method has important value and significance especially for realizing remote awakening of an underwater platform.

The invention provides an operation control center, a rail vehicle and a dormancy method, device and system. The dormancy method comprises the following steps that the rail vehicle receives a dormancyinstruction sent by an operation control center; and the rail vehicle disconnects a constant electricity power supply loop of the rail vehicle according to the dormancy instruction, and the constantelectricity power supply loop is a loop when a constant electricity power supply of the rail vehicle supplies power to a vehicle-mounted controller and a vehicle-mounted control and management systemof the rail vehicle. According to the dormancy method of the railway vehicle, disconnection control of the railway vehicle constant electricity power supply loop can be achieved, a problem that due toa fact that a capacity of a constant power supply is limited, lasting dormancy cannot be achieved is solved, a service life of the railway vehicle constant electricity power supply is prolonged, andthe dormancy time of the railway vehicle is prolonged.

The invention provides a dynamic beacon interval (BI) design method based on a wireless multimedia sensor networks enhanced distributed channel access (EDCA) mechanism. The invention has the advantages that: the method is applied to wireless multimedia sensor networks, the characteristics of different data traffic are completely utilized, corresponding BIs are designed according to different types of data; on one hand, collision between high priority traffic sensitive to time such as audio streams and video streams and low priority traffic, which is generated during channel competition, can be reduced, more chances of accessing channel can be acquired, so that energy waste caused by the collision can be effectively reduced, network power consumption is reduced, meanwhile, data is continuously transmitted by using a transmission opportunity (TXOP) mechanism after entering a channel, so that the network throughput rate is greatly improved, and network time delay is effectively reduced; and on the other hand, the network power consumption can be effectively reduced by increasing the sleep time of transmitting nodes of the low priority traffic such as E-mail which is not sensitive to the time, and user experience cannot be influenced simultaneously; in addition, the data volume of the low priority traffic is small, so that the influence of low priority traffic on the network throughput and time delay is low.

The invention discloses health-protection traditional Chinese medicinal porridge capable of improving insomnia. The health-protection traditional Chinese medicinal porridge is prepared from the following raw materials in parts by weight: 10 parts of salviae miltiorrhizae, 10 parts of radix ophiopogonis, 10 parts of polygala tenuifolia, 10 parts of lotus seeds, 15 parts of longans, 50 parts of barley, 100-300 parts of sticky rice and 0-50 parts of crystal sugar. The traditional Chinese medicinal porridge disclosed by the invention has the effects of nourishing heart, soothing nerves, tonifying spleen and tonifying kidney, can stimulate the appetite, strengthen the body, promote the sleeping of people in early time, prolong the sleep duration and reduce the night awakening times and has an obvious effect.

The invention discloses a stopper rod head and a preparation method thereof, wherein the stopper rod head comprises spinel particles with different particle sizes, graphite 199, graphite 899, an additive and a binding agent, and specifically comprises, by weight, 30-40% of white corundum 36#, 10-20% of white corundum 80#, 30-40% of white corundum 325#, 10-20% of graphite 199, 5-10% of graphite 899, 5-10% of an additive, and 10-15% of a binder. According to the invention, spinel is adopted to replace previous corundum to serve as the main material of the stopper rod head, and reacts with the additive to generate forsterite or calcium forsterite to seal part of the gas holes in the material, so that the additive is prevented from permeating into the material, the erosion resistance is improved, and the service life of the stopper rod head is prolonged through the special ratio.