177results about How to "Reduce transmission power consumption" patented technology

The invention discloses a wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device which comprises a duplexer, a radio frequency front end, a variable gain complex filter, an automatic frequency tuning circuit, a programmable gain amplifier, a phase-locked loop frequency synthesizer, a digital processor, a storage, a variable gain power amplifier, a mixer and a low pass filter, wherein the duplexer, the radio frequency front end, the variable gain complex filter, the automatic frequency tuning circuit and the programmable gain amplifier form a receiving link which is used for receiving and processing a radio frequency signal and converting the radio frequency signal into a low-medium frequency digital signal so that the signal can be conveniently processed by a subsequent analog-digital converter later; the duplexer, the variable gain power amplifier, the mixer and the low pass filter form an emitting link which is used for mixing a baseband analog modulation signal into a carrier frequency and sending a wireless signal; and the receiving link and the emitting link share the duplexer. The wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device realizes singlechip integration by adopting a standard CMOS (Complementary Metal Oxide Semiconductor) process, is simple in structure and low in power consumption, and is applicable to a wireless sensor network.

The invention discloses a bean failure processing method, an auxiliary base station failure processing method and a terminal. The method comprises the following steps: receiving a downlink reference beam or a downlink reference signal sent by network side equipment; and if the downlink reference beam or the downlink reference signal is failed to receive, adjusting an uplink transmission way corresponding to the downlink frequency beam or the downlink frequency signal according to the preset beam processing way. Through the processing method disclosed by the invention, the terminal processes the uplink transmission corresponding to the downlink reference beam or the downlink reference signal according to the preset beam processing way when being failed to receive the downlink reference beamor the downlink reference signal sent by the network side equipment; and the processing way of how to process the defined uplink sending behavior is given out after the terminal detects the beam failure.

The invention discloses a convolutional neural network acceleration engine, a convolutional neural network acceleration system and a convolutional neural network acceleration method, and belongs to the field of heterogeneous computing acceleration, wherein the physical PE matrix comprises a plurality of physical PE units, and the physical PE units are used for executing row convolution operation and related partial sum accumulation operation; the XY interconnection bus is used for transmitting the input feature image data, the output feature image data and the convolution kernel parameters from the global cache to the physical PE matrix, or transmitting an operation result generated by the physical PE matrix to the global cache; the adjacent interconnection bus is used for transmitting anintermediate result between the same column of physical PE units; the system comprises a 3D-Memory, and a convolutional neural network acceleration engine is integrated in a memory controller of eachVault unit and used for completing a subset of a convolutional neural network calculation task; the method is optimized layer by layer on the basis of the system. According to the invention, the performance and energy consumption of the convolutional neural network can be improved.

The invention discloses a low-energy cooperation transmission method in a heterogeneous network. A heterogeneous network system comprises a macro cell and a micro cell. The macro cell comprises a macro base station. The micro cell comprises a micro base station. A cooperation cluster is composed of the macro cell and the micro cell. The low-energy cooperation transmission method in the heterogeneous network includes a first step of obtaining normalization precoding of a Co MP-JP model, a micro base station (MBS) model and a micro base station (m BS) model based on P-ZFBF, a second step of constructing mixed cooperation precoding, wherein the Co MP-JP model, the MBS model and the m BS model are arrayed in a weighted and plural mode to obtain mixed precoding vector quantity of a user i of all base stations, a third step of ensuring data range of compound weighted coefficient amplitude value |Lambada ij| and obtaining circuit power consumption, signal processing power consumption, backbone network power consumption and emission power consumption in the data range and a fourth step of obtaining corresponding total power consumption of seven mixed models in the third step and obtaining a service model which enables the total power consumption to be the minimum, corresponding mixed precoding and the minimum power consumption. The low-energy cooperation transmission method in the heterogeneous network self-adaptively selects a cooperation model with the minimum power consumption, thereby achieving the minimum energy consumption.

The invention discloses an internet of things gateway supporting ubiquitous green community control network protocol (UGCCNet) and 6lowpan. The gateway comprises a bottom layer extension network interface module, a protocol conversion module and a UGCCNet interface module. The bottom layer extension network interface module receives data from a bottom extension network and sends data that have been processed by the protocol conversion module and a correlated command to the bottom layer extension network; the protocol conversion module is responsible for converting protocols between the bottom extension network and a network supporting UGCCNet, thereby realizing interaction between the two networks; and the UGCCNet interface module is responsible for sending data with a standard format that has been processed by format conversion to a network server supporting the UGCCNet and receiving command data issued by the server. According to the invention, because the provided gateway is arranged between the bottom layer sensing extension network and the UGCCNet, unified control and management on diversified bottom layer extension networks can be realized; meanwhile, objectives that transmission power consumption is reduced and transmission efficiency is improved can be achieved.

A method for reducing the consumption of the transmission power in the base station by adjusting the transmission interval between the control signals comprises the steps of: changing the interval between the control signals transmitted from the base station from a first interval to a second interval and transmitting the control signal; receiving a first message including transmission interval adjustment request information of the control signal; and changing the interval between the control signals to the first interval and transmitting the control signal.

The invention provides a measurement and transmission apparatus for marine riser fatigue parameters and a calculation method of optimal repeater spacing. The apparatus comprises an underwater sound signal receiving device, a plurality of repeaters and a marine riser fatigue monitoring device. The marine riser fatigue monitoring device detects a fatigue signal and transmits the fatigue signal to the repeaters; and after multiple transmissions by the repeaters, the fatigue signal is transmitted to the underwater sound signal receiving device. According to calculation of energy consumption of different repeater spacing single hop links, total transmission energy consumption of employing different repeater spacings is figured out, thereby figuring out the optimal repeater spacing corresponding to a lowest total transmission energy consumption by comparison. The invention employs repeaters to shorten a signal transmission distance, reduce transmission power consumption of a single hop distance; besides, an optimal distance scope exists, so as to realize a lowest total transmission energy consumption.

The invention relates to a wireless communication device for implantable medical instruments and belongs to the technical field of implantable medical instruments. The wireless communication device comprises an in-vitro transceiver and implantable in-vivo transceivers, and is characterized in that a communication frequency band covers 401MHz-406MHz and 420MHz-445MHz and is capable of achieving an adaptive frequency hopping function within the frequency band, one in-vitro transceiver can be in simultaneous real-time communication with a plurality of in-vivo transceivers, body penetrating communication distance is longer than 2m, modulation modes are flexible, communication rate and transmission power can be adaptively adjusted, the maximum communication bitrate is not less than 100kbps, and wireless communication can be simultaneously performed with existing wireless charging. The wireless communication device for the implantable medical instruments has the advantages of simple implementation mode, reliable communication processes, high intelligent degree and anti-interference capability, small size, low transmission power, long distance, high speed and the like, is capable of achieving a one-to-many communication function and can be widely applied to various implantable medical instruments.

The invention discloses a virtual MIMO power distribution transmission proposal based on a wireless sensor network, comprising the following steps: firstly, nodes which are required to transmit information in a cluster respectively transmit RTX packets to convergent nodes in the wireless sensor network; secondly, the convergent nodes estimate channel impulse response of a link according to a RTS packet which is transmitted by each node; thirdly, optimized transmission power of each node is calculated by utilization of channel impulse response information, under the condition that total transmission power is certain, and an optimum power distribution algorithm based on a Karush-Kuhn-Tucker(KKT) condition and an suboptimum power distribution algorithm based on signal to interference and noise ratio (SINR) are adopted; fourthly, optimized transmission power information is added into CTS packets and then transmitted to the entire cluster by means of broadcast, and an idle MIMO channel is established; fifthly, after the transmission nodes in the cluster receive the CTS packets, the transmission nodes transmit signals simultaneously according to the optimized transmission power; sixthly, after the convergent nodes receive the signals which are transmitted by a plurality of nodes, decoding of each layer of signals is performed by adoption of a layer detection algorithm and through combination of the transmission power of each node; seventhly, wireless sensor network applications like target tracking and positioning and so on are performed according to information integration of each node. The invention is suitable for application in the wireless sensor network.

The invention discloses a method for searching a mapping scheme between tasks and nodes of an NoC and a network code position. According to mapping of multicast applications on the wireless NoC, during searching of an optimal node distribution and route selection scheme, total power consumption and response time of the unicast task serve as priority indexes for checking the scheme, and meanwhile, the maximum throughput rate of the multicast task and the lowest network transmission power consumption of the multicast task are guaranteed. Thus, the performance of the network designed as per the scheme selected according to the method is optimal, and compared with other methods for searching priority schemes of mapping between the tasks and the nodes under the conditions of multiple objective functions, the method has the advantages of being low in complexity and easy to implement.

The invention relates to a short-wave communication system based on fountain codes and single carrier frequency domain equalization and a transmission method thereof, and belongs to the technical field related to wireless communication systems, communication signal processing and channel encoding and decoding. Fountain codes are employed in the short-wave data transmission system, and source encoding-channel encoding-modulation combined optimized technology is used, thereby effectively shortening the file transmission time delay in short-wave unidirectional non-feedback channels, enhancing the reliability of a communication system under severe channel environment, improving file transmission efficiency, and effectively ensuring data reliability. Single carrier frequency domain equalization technology based on time-frequency mixed channel estimation is employed to greatly reduce the complexity of a receiver of a single carrier system, and greatly increase the capability of the system to resist frequency domain selectivity fading due caused by multipath transmission of short-wave channels.

Embodiments of the invention provide a method and a device for controlling wireless transmitting power. The method comprises the following steps that a wireless device detects wireless signal strength of each wireless terminal which communicates with the wireless device; and the wireless device judges the relationship between the wireless signal strength of each wireless terminal and a signal strength threshold and adjusts the wireless transmitting power of data which is sent to each wireless terminal by the wireless device according to a judging result. According to the method and the device for controlling the wireless transmitting power, which are provided by the embodiments of the invention, the disturbance of the environment to a wireless terminal signal can be more precisely recognized, so that a purpose of further reducing the transmitting power consumption is realized.

The invention discloses a networking method for a wireless sensor network, which comprises the following steps that sensor nodes establish connection and reception power tables with adjacent sensor nodes in a broadcast detection way; the sensor nodes converge towards a root node according to a connection situation of the root node; the connection tables and reception power tables of the nodes are combined in sequence to generate corresponding link feedback table data packets in a converging process; the data packets are gathered to be uploaded to the root node; the root node dispatches node transmitting-receiving sequence numbers of main links and branch links where the sensor nodes are located for the sensor nodes according to link feedback tables and networking rules; and networking of the sensor nodes is conducted according to the dispatched node transmitting-receiving sequence numbers. According to the method, link transmitting-receiving sequence numbers are issued to end nodes by taking advantages of the strong calculation processing capacity of the root node, plan networking of all the nodes in a whole network is realized, the circuit configuration of the nodes is greatly reduced, a communication process is simplified, and the networking is optimized.

The invention relates to a wireless sensor network outlier data self-adaption detecting method based on entropy measurement. The wireless sensor network outlier data self-adaption detecting method is characterized by comprising the following steps of 1, network model building: if IV sensor nodes are randomly deployed in a square region A (1*1), a sensor network is divided into a plurality of clusters, one cluster comprises one cluster head and a plurality of cluster member nodes, cluster members are only in charge of collecting and transferring data, the cluster head has the functions of a sensor node and also manages the members in the cluster, and the following network model is built. The wireless sensor network outlier data self-adaption detecting method has the advantages that the concepts of node information entropy and two-dimensional information entropy in the cluster are provided, and the node information entropy and the two-dimensional information entropy can be used as statistical characteristic quantities for respectively describing the information quantity level of global data in the cluster and single node data.

The invention discloses a frequency offset compensation method and system. The method comprises the steps of: carrying out preprocessing on N paths of received array element signals; respectively carrying out digital down-conversion processing on the N paths of preprocessed array element signals so as to obtain N paths of target signals; aiming at each path of signal to be compensated, acquiring a relative frequency difference between the signal to be compensated and a reference signal, wherein the reference signal is a random path of signal in the N paths of target signal, and the signals to be compensated are signals in the N paths of target signals except for the reference signal; and aiming at each path of signal to be compensated, according to the relative frequency difference between the signal to be compensated and the reference signal, carrying out frequency offset compensation on the signal to be compensated. Implementation of the frequency offset compensation method and system disclosed by the invention has the beneficial effects that by a frequency offset compensator and a phase retrieval module, one random path of signal is used as the reference signal and the rest of channels are subjected to frequency offset compensation, so that frequency offset nonuniformity of the N paths of signals, which is generated by relative motion and a local oscillation error, can be improved.

The invention discloses a networking method in RTK measurement. According to the method, a base station is used as a center node, an observation station is used as a child node, a neighbor node of the center node is used as a first layer child node, a neighbor node of the first layer child node is used as a second layer child node, and the like; the child nodes of the layer with the small sequence number are relay nodes from the child nodes of the layer with the large sequence number to the center node; when networking is needed, a networking order and networking parameters are sent to the center node, and after receiving the networking order, the center node carries out active networking or passive networking according to the received networking parameters. According to the method, the observation station is used as a relay in the communication process, so that the theoretical measurement range is widened infinitely, then the emission power consumption of the base station is reduced, and the equipment cost is reduced.

The invention provides a soaking and drowning alarm system and a control method thereof. The system comprises a transmitting module and a receiving module. The transmitting module comprises a first microprocessor, and one or more water immersion sensors, a first alarm module and a signal transmitting module which are connected with the first microprocessor. The receiving module comprises a second microprocessor, and a second alarm module and a signal receiving module which are connected with the second microprocessor. The first microprocessor and the second microprocessor communicate with each other through the signal transmitting module and the signal receiving module. The risk of drowning to users can be reduced effectively. The system is an effective means of drowning detection and prevention. The system adapts to various complex environments, is of low transmitting power and high receiving sensitivity, and raises the sound and light alarm automatically. Whether the transmitter goes into water can be detected in real time. The occurrence of drowning can be effectively prevented and reduced. The scheme has the advantages of low cost, simple manufacture, easy popularization, and high practicability.

The invention discloses a composite phase change heat exchange system for flue gas heat recovery of boiler, comprising an original coal saving device of the boiler and an air pre-heater, a dust remover and a desulfurization tower; a heat conducting oil heater, a stage I composite phase changer, a stage II composite phase changer, a stage III composite phase changer, and a temperature adjusting system matched with the stage I, state II and stage III composite phase changers are disposed in the flue; the temperature adjusting system can be used for conveniently adjusting the wall surface temperature of the phase change heat exchanger; the heat conducting oil is used as the heat source of the stage III phase change heat exchanger, so as to improve the flue purity and reach the flue discharge requirement. The invention can solve the difficult problem that it is difficult to dispose the evaporation section of the heat exchange round tube in vertical flue or oblique flue, so as to realize the integrated compact arrangements of the evaporation section and condensation section of the phase change heat exchanger; the disadvantage of GGH is overcome; the hazard degree of low-temperature corrosion is decreased, so as to realize the targets of energy saving, water saving and emission reduction.

This invention relates to a special diastatic nutritive complex zyme specially used in alcohol and fuel alcohol including the following components in weight percentage: compound cellulose: 10-20%, pectic enzyme; 3-7%, proteinase: 5-15%, debranching enzyme: 5-15%, phytase: 5-15%, beta-amylase: rest. This invention adds the said diastatic nutritive complex zyme into the being saccharificated materials at one run at the diastatic stage. This invented multizyme reagent compound recipe can replace the beta-amylase in the current technology.

The invention discloses a power transmission line monitoring data transmission system comprising a central server and a plurality of first-layer data acquisition units; the plurality of first-layer data acquisition units are of a series structure, and the adjacent first-layer data acquisition units are in communication connection through a first-type transmission protocol and / or a second-type transmission protocol; The tail end node of the first-layer data acquisition unit is connected with the central server through a third-type transmission protocol; Each first-layer data acquisition unit isconnected with a plurality of second-layer data acquisition units through a fourth-type transmission protocol; Wherein the first type of transmission protocols are long-distance and large-data-volumetransmission protocols, the second type of transmission protocols are low-power-consumption and small-data-volume transmission protocols, the third type of transmission protocols are Internet of Things communication protocols, and the fourth type of transmission protocols are near-field communication protocols. The system can construct a network for transmitting data in a cellular-free mobile data network area, and can obtain the highest data transmission efficiency with the lowest energy consumption.

The invention relates to a 360-degree learning infrared forwarding system based on carrier communication and a method thereof. The system adopts electric carrier communication as the communication way, the electric carrier communication has the advantages of penetration of walls and no need of wires, so that the system integration of the infrared forwarding system is simplified. The 360-degree learning infrared forwarding system based on carrier communication comprises an infrared forwarding device, a control terminal, a gateway and a server. The infrared forwarding device comprises an infrared forwarding device circuit board, the infrared forwarding device circuit board is provided with a learning / forwarding system, the learning / forwarding system comprises a single-chip, the single-chip is connected to an indicator light circuit, a power supply, an electric carrier module and an infrared learning / emitting module, the electric carrier module and the infrared learning / emitting module have two way communications with the single-chip, and the electric carrier module is connected to the single-chip through a serial port communication circuit.

The invention provides a data message transmission method and device. The transmission method comprises the steps of determining a first sending rate and a transmitting power for sending the first preset number of data messages; sending the first preset number of data messages to an opposite end device according to the first sending rate and the transmitting power, and obtaining a first data sending bit error rate; after the first preset number of data messages are sent completely, obtaining a second sending rate for sending the data messages; if the second sending rate is the same to the second sending rate and the first bit error rate is smaller than a first preset threshold value, reducing the transmitting power; and continuing to send the data messages to the opposite end device according to the reduced transmitting power and the second sending rate. Under the condition that the sending rate is unchanged, when the data sending bit error rate is smaller than the preset value, the transmitting power of the data is reduced, thereby reducing the data sending power consumption when the bit error rate is relatively low.

The invention provides a crosstalk resistant and low power consumption coding and decoding method and a codec thereof, which can effectively reduce the dynamic power consumption of data transmission and improve the quality of the data transmission. The coding and decoding method of the invention changes the encoding mode of data by considering the reduction of the number of turns between data; compared with original data, the number of turns can be reduced by 37.56%, so that the dynamic power consumption in the data transmission is effectively reduced; and by inserting a mask code in the worst crosstalk condition, the crosstalk between data can be effectively reduced on the premise of minimizing the additional power consumption. For a random data source, the crosstalk resistant and low power consumption coding and decoding method and the codec thereof provided by the invention reduce the transmission power consumption by 37.51% while avoiding the worst crosstalk.

The invention discloses an ECG signal processing method based on an unbalanced training two-level neural network, which comprises the following steps: preprocessing: collecting ECG signal, adopting filter to eliminate baseline drift and power frequency interference, searching an R peak of the waveform of the ECG signal,and segmenting the beat of the ECG signal; signal recognition: ECG signals after heart beat segmentation are recognized by two-level neural network with unbalanced training, and abnormal ECG signals and normal ECG signals are obtained, wherein unbalanced training needs to be combined with two-level neural network; and compression processing: the ECG signal is subjected to adaptive compression based on intelligent diagnosis.

The invention discloses a symmetrical transmitting-receiving integrated infrared thru-beam sensor. Two parts forming the thru-beam sensor are completely the same, transmitting and receiving are integrated, and pairing is not needed when the two parts are used in pairs; the two parts of the thru-beam sensor do not need to be connected, and thru-beam detection signals can be independently outputted.The thru-beam sensor comprises an infrared receiving part and an infrared transmitting part which are provided with converging lenses, a driving circuit for generating infrared pulses, a decoding circuit for processing received infrared signals, and an indicator lamp for shielding detection output and indicating the quality of the received signals. The thru-beam sensor alternately receives and transmits discontinuous pulse sequence coded infrared signals, can give consideration to correlation detection distance and detection response speed, and reduces emission power consumption at the same time. When in use, the two parts only need to be installed at two sides of a monitored channel, and the shielding detection signals can be simultaneously output at two sides by observing the signal quality indicating lamp to adjust the alignment direction, so the installation and debugging are simple and convenient, and the application is more flexible.

The invention discloses a field observation data transmission method and device. The device comprises data transmission devices of a sending terminal and a receiving terminal, and the data transmission devices of the sending terminal and the receiving terminal separately comprise two parts, namely a protocol board and a data radio station board card. The transmission method comprises the followingsteps: improving a response mechanism, a timeout mechanism and a window mechanism of a selection-retransmission ARQ; extracting observation data, and sending the observation data to a data receivinghost; and finally integrating a power management function and a working time management function on the protocol board. The field observation data transmission method and device disclosed by the invention have the advantages that after the realization processes of various reliability protocols are analyzed, the low-power-consumption design is incorporated into the protocol improvement, and under the assistance of the power management on the respect of the hardware system, the transmission power consumption can be effectively reduced during field data transmission, the volume is small and the cost is low.

The invention discloses a low-power multi-mode positioning label which comprises at least one radio frequency module, which supports multiple radio frequency modes including at least one low-power narrow-band transmission mode, a micro-controller module, an electric quantity monitoring module which is used for monitoring the residual electric quantity condition of the electric quantity monitoringmodule and connected with the micro-controller module, and an accelerometer module which is used for monitoring that the accelerometer module is in a motion state or a static state and connected withthe micro-controller module. The positioning label uses an accelerometer to judge whether the label is in a motion state, and broadcasting collected positioning nodes and sending acquired informationcan be done frequently only in the motion state, so that a large amount of power consumption is reduced. Due to the fact that the positioning label adopts an emerging low-power narrow-band mode to transmit data, the transmission power consumption is low, and the long-standing problem that the battery life of the positioning label is short is solved.

The invention discloses an air-conditioning refrigeration method and air-conditioning refrigeration system of a data center as well as the data center. The refrigeration method comprises the step of switching among the following refrigeration modes: when the data center operates in summer, spring and summer transition season and summer and autumn transition season, cooling water cooled by a cooling tower takes away heat of a condenser of a water cooling unit; freezing water of multiple water cooling units which are connected in parallel or in series is fed into an air-conditioning unit and exchanges heat with the air; and when the data center operates in winter, refrigerant water prepared after the freezing water is cooled by the cooling tower is fed into a heat exchange unit and exchangesheat with the freezing water on the tail end side of the air conditioner, and the freezing water after heat exchange is fed into the air-conditioning unit and exchanges heat with the air. The air-conditioning refrigeration system comprises the air-conditioning unit, the heat exchange unit, at least two groups of cooling towers and at least two groups of water cooling units, is connected with a circulating pump through a pipeline and switches the refrigeration modes through a valve on the pipeline. The data center comprises the above air-conditioning refrigeration system, the refrigeration modes are switched according to the operating environment of the data center, the air-conditioning water energy is utilized maximally and energy is saved.

The invention discloses an algorithm for avoiding a routing loop for an RPL (IPv6Routing Protocol for Low-Power and Lossy Networks) protocol, which belongs to the technical field of a wireless sensor network. In the case of a consistent event, continuous transmission for Vcon times is firstly carried out, if consistency still exists, Q*Imin times are added between each two transmission intervals, information exchange between nodes is enhanced, a situation in which link quality deterioration happens to nodes at one side, and the other side of nodes cannot be timely informed is avoided, and the probability of loop appearing can be reduced. In the case of an inconsistent event, continuous transmission for Vcon times is firstly carried out, if inconsistency still exists, transmission interruption is added cyclically in each two times of continuous transmission, transmission interruption is controlled through Crand, 1 is increased each time when Crand is used for one time, time for transmission interruption is a product between the minimal transmission interval Imin and a variate between (0, Crand),and by the analogy, when the Crand value is equal to P, a variable is reset, and control on the inconsistent event is started again. A transmission interval between consistency and inconsistency by the existing Trickle algorithm is improved, and the probability of routing loops is reduced.

The invention discloses a hydrological data acquisition and transmission system of a public network based on a GPRS (general radio packet service) network, which mainly comprises a hydrological sensor, a GPRS data transmission device, the GPRS network, the Internet and a data center connected sequentially. The data center comprises a modem, and the modem is connected with the Internet. The invention has the advantages that: 1, the reliability is high; 2, the real-time performance is high; 3, the collection and reading scope is wide; 4, the system construction cost is low; 5, the system operating cost is low; and 6, the system transmission capacity is high.