191 results about "Switching algorithm" patented technology

The invention discloses a switching method and a switching device of a wireless local area network. The method comprises the steps as follows: when a client end device detects that the signal intensity of a current access point is lower than a predetermined scan threshold, the client end device scans adjacent AP; when the client end device detects the adjacent AP the signal intensity of which is larger than or equal to the predetermined back-up AP threshold, the adjacent AP is added to a back-up AP list; and when a predetermined switching condition is satisfied, the client end device is switched to the adjacent AP in the back-up AP list from the current AP. In the invention, when moving, a wireless terminal device can start scan in time to acquire information of the adjacent AP according to parameters indicated by a network side AP, adjusts switching algorithm according to the parameters indicated by the network side AP to select the adjacent AP to carry out switching, and then is switched to a proper AP in real time when fast moving in a WLAN overlay area and obtains satisfied access service and communication effects.

The invention relates to a rapid switching method for a wireless local area network, wherein, in a beacon frame being sent, an access point contains a channel used by an adjacent access point, SSID (service set identifier) and BSSID (basic service set identifier) information; a mobile station receives and stores the information of a target access point in the beacon frame, and when switching condition is satisfied, the information is used as a reference for selecting the target access point in switching. The mobile station preferentially searches the beacon frame or sends a polling request frame on a channel appointed by the information, and selects a next access point needing to be switched according to the RSSI (received signal quality indication) of the beacon frame or a polling response frame. Through the rapid switching algorithm of the invention, the mobile station does not need to scan all channels in the wireless local area network, thus greatly reducing switching delay.

A reconfigurable optical blocking filter deletes a desired optical channel(s) from an optical WDM input signal, and includes a spatial light modulator having a micro-mirror device with a two-dimensional array of micro-mirrors that tilt between first and second positions in a “digital” fashion in response to a control signal provided by a controller in accordance with a switching algorithm and an input command. A collimators, diffraction grating, and Fourier lens, collectively collimate, separate and focus the optical input channels onto the array of micro-mirrors. The optical channel is focused on the micro-mirrors onto a plurality of micro-mirrors of the micro-mirror device, which effectively pixelates the optical channels. To delete an input channel of the optical input signal, micro-mirrors associated with each desired input channel are tilted to reflect the desired input channel away from the return path.

The invention discloses a multi-band structure self-adaptive filter switching method for AEC (acoustic echo cancellation). Firstly, a far-end voice signal is acquired; a voice endpoint is detected, and a VAD (voice activity detection) flag bit and an improved envelope decision threshold are output; the voice signal is fed into a loudspeaker to serve as a desired signal and also input into a self-adaptive filter; the self-adaptive filter adopts a switchable multi-band structure and a corresponding self-adaptive algorithm, parameters of the filter are adjusted by use of the least mean square criterion according to feedback information, and the optimal solution is obtained. According to the provided switching method, voice characteristics are considered sufficiently under the condition that steady maladjustment is guaranteed, and optimized configuration of the convergence rate and the algorithm complexity is realized while advantages of the algorithm in the convergence rate are utilized. During actual application of echo cancellation, a single algorithm does not easily meet various variable demands. The variable switching algorithm provides more probability for a user and has great significance in application of self-adaptive echo cancellation.

An dynamic optical filter 10 is provided to selectively attenuate or filter a wavelength band(s) of light (i.e., optical channel(s)) or a group(s) of wavelength bands of an optical WDM input signal 12. The optical filter is controllable or programmable to selectively provide a desired filter function. The optical filter 10 includes a spatial light modulator 36, which comprises an array of micromirrors 52 that effectively forms a two-dimensional diffraction grating mounted in a retro-reflecting configuration. Each optical channel 14 is dispersed separately or overlappingly onto the array of micro-mirrors 52 along a spectral axis or direction 55 such that each optical channel or group of optical channels are spread over a plurality of micromirrors to effectively pixelate each of the optical channels or input signal. Each channel 14 or group of channels may be selectively attenuated by flipping or tilting a selected number of micromirrors to thereby deflect a portion of the incident radiation away from the return optical path. The micro-mirrors operate in a digital manner by flipping between a first and second position in response to a control signal 56 provided by a controller 58 in accordance with an attenuation algorithm and an input command 60. The switching algorithm may provide a bit (or pixel) map or look-up table indicative of the state of each of the micro-mirrors 52 of the array to selectively attenuate the input signal and provide a modified output signal 38 at optical fiber 40.

A chromatic dispersion compensation device selectively delays a respective portion of spectral sections of each respective optical channel of an optical WDM input signal to compensate each optical channel for dispersion compensation, and includes a spatial light modulator having a micromirror device with a two-dimensional array of micromirrors. The micromirrors tilt or flip between first and second positions in a “digital” fashion in response to a control signal provided by a controller in accordance with a switching algorithm and an input command. A collimator, diffraction gratings, and Fourier lens collectively collimate, disperse and focus the optical input channels onto the array of micromirrors. Each optical channel is focused onto micromirrors of the micromirror device, which effectively pixelates the optical channels. To compensate an optical channel for chromatic dispersion, a portion of the spectral sections of each channel is delayed a desired time period by tilting an array of mirrors (i.e., spectral array) disposed in each spectral section at different spatial positions on the micromirror device.

A reconfigurable optical interleaver/deinterleaver device combines/separates a pair of optical input signals from and/or to an optical WDM input signal. The interleaver device includes a spatial light modulator having a micro-mirror device with a two-dimensional array of micro-mirrors that flip between first and second positions in a “digital” fashion in response to a control signal provided by a controller in accordance with a switching algorithm and an input command. A pair of collimators, diffraction gratings and Fourier lens collectively collimate, separate and focus the optical input channels and optical add channels onto the array of micro-mirrors. Each optical channel is focused on a plurality of micro-mirrors of the micro-mirror device, which effectively pixelates the optical channels.

The invention provides a trans-camera target tracking method and a trans-camera target tracking device on the basis of dynamic path trees. The trans-camera target tracking method includes carrying out single-camera target tracking on specified targets in the visual angle range of each optional camera in each preliminarily constructed camera network until the specified targets leave the visual angle range of the current camera; acquiring currently required-to-be-searched camera lists according to target search region switching algorithms; detecting objects for video data of all cameras in the camera lists and screening suspicious objects by the aid of visual similarity matching algorithms; processing the suspicious objects according to dynamic path tree models and inferring movement tracks of the specified targets. The similarity of the visual appearance of the suspicious objects and the visual appearance of the specified targets is higher than preset thresholds. The trans-camera target tracking method and the trans-camera target tracking device have the advantages that accurate trans-camera target tracking can be carried out under the condition of the possibly minimum computational resource expenditure, and paths can be accurately predicted.

The present invention relates to a method for controlling a transmission control protocol window size in an asynchronous transfer mode which determines a TCP congestion window size by using an explicit rate value in a resource management cell. According to the present invention, cells transmitted pursuant to the explicit rate value are rarely dropped or tagged by a switch algorithm, thereby reducing a ratio of transmission.

The invention relates to a switch method, a switch device and a switch system in a communication network. The method comprises the following steps: defining the switch grade of a source network and the switch grade of an object network; deciding whether to conduct switch operation based on the switch grade of the source network and the switch grade of the object network; and when switch operationis determined to conduct based on switch decision result, sending a notice to conduct the switch operation. The embodiment of the invention takes the switch grade of the source network and the switchgrade of the object network into consideration respectively, including switch urgency degree of the source network, or whether the object network is allowed to switch, and the like, so as to ensure reasonability of switch process and balance different network applications, thereby improving effectiveness of switch algorithm and keeping balance between user satisfaction and network efficiency.

The present invention provides a rail traffic scene-based service cell switch processing method. The method comprises the steps that a source eNode B performs measurement configuration on UE, and the UE reports the measurement according to measurement configuration; the source eNode B determines pre-switch according to train geographical position information reported by the UE, and triggers the UE to enter a pre-switch state, and the UE is in a continuous scheduling state and reports the measurement more frequently; the source eNode B determines switch according to a preset loose switching algorithm, and sends a switch request message; a target eNode B receives the request and then prepares for switching, and does not need to perform acceptance control; and the source eNode B transmits a switching command to the UE, and the UE receives the switching command and then executes synchronization with the target eNode B. The present invention mainly provides a faster, more stable and reliable rail traffic service cell switch processing method that has high market value.

In order to solve the problem of selection of optimum switching reference points of a high speed railway fixed-point switching algorithm, the invention provides an optimum switching reference point selecting method. The method comprises the steps of firstly utilizing the RSRP and the BLER calculated by the RSRP for conducting initial selection of switching reference points, then, according to the switching reference point recording obtained by a large number of measurements, establishing a probability statistics model, and analyzing and obtaining the optimum switching reference points. According to the algorithm, the rapid switching problem under the high-speed mobile environment can be solved, the times of dropped calls of the communication can be reduced, the switching success rate is improved, the service quality of the high-speed broadband mobile service can be enhanced, conducting of multimedia broadband mobile internet services in high-speed trains is promoted, and the increasingly-growing requirements of passengers for mobile communication services are met.

The invention discloses an instant communication system and method based on autonym/anonymity switching. The instant communication system comprises a first communication module and a second communication module which are communicated through a server. The server is used for providing different conversation modes for users carrying out communication through the first communication module and the second communication module, and the users can be switched between the autonym and the anonymity through a user identity switching algorithm in the conversation modes. The instant communication method comprises autonym-anonymity (anonymity-autonym) identity chatting and anonymity-anonymity chatting. By means of the instant communication system and method, the problems that in the prior art, the users can use the instant communication service only with the single real identity and the unique ID, the real identity information of a publisher of sensitive information and a receiver is revealed, the service requirement of the users for carrying out communication with multiple identities is limited, and the user experience is reduced are solved.

The invention discloses a capacitive screen comprehensive testing circuit, a testing method and an output data switching algorithm of the testing method. The capacitive screen comprehensive testing circuit comprises a master control chip, a USB (Universal Serial Bus)-to-serial port chip, a dial switch and an adapter plate, wherein an output end of the master control chip is connected with a USB-to-serial communication chip and an input end of the dial switch respectively; the master control chip is connected with the capacitive touch screen through the adapter plate; an output end of the USB-to-serial communication chip is connected with an input end of a computer serial communication port; and the computer serial communication port is connected with testing software. A set of circuit board device is adopted, a software algorithm is designed in a firmware of CTP (Capacitive Touch Panel), and the two are matched for use, so that the CTPs of various different ports can be connected to perform various different kinds of data analysis test working by using only one set of circuit board device and only one firmware at a research, development and debugging stage, a production testing stage and a repair stage of the CTP.

The invention relates to a duplicate hot standby method of an embedded system, and belongs to the technical field of embedded systems. The method comprises the following steps: firstly adopting the "firstly started being the main" active/standby computer identity identification mechanism to confirm the identity of active/standby computers; configuring two heartbeat wires for the heartbeat communication between the active/standby computers, and creating a mutual exclusion signal amount on the host in a normal working state so as to determine that only one machine is in a working state at present, thereby avoiding the occurrence of the double host phenomenon; establishing an active/standby computer synchronous communication mechanism, and ensuring the states of the active/standby computers and the real-time communication of received data; and monitoring the working states of the active/standby computers in real time, diagnosing the system faults in time, and adopting an automatic active/standby computer switching algorithm to achieve a duplicate hot standby function.

The invention discloses an indoor and outdoor positioning seamless switching method based on a mobile terminal, which relates to the technical field of mobile terminal positioning. The method includesthe following steps: processing a positioning switching buffer region; setting a buffer time threshold, an indoor positioning error threshold and an outdoor positioning error threshold required in amobile terminal positioning switching algorithm; and determining the region where a mobile terminal is located currently, and if the mobile terminal is in the positioning switching buffer region, starting the positioning switching algorithm, and starting an indoor-to-outdoor positioning switching or outdoor-to-indoor positioning switching mode by determining whether the mobile terminal is locatedindoors or outdoors, in order to carry out seamless switching between indoor positioning and outdoor positioning of the mobile terminal. The advantage is that an indoor positioning coordinate datum isconverted into an outdoor GPS/BeiDou positioning coordinate system, and the problem of coordinate conversion in indoor and outdoor positioning seamless switching is solved. Seamless switching betweenindoor positioning and outdoor positioning is realized.

The invention discloses a successive approximation type analog-to-digital converter and a low power consumption switching algorithm thereof. By adopting a split capacitor array structure and a reasonable control logic setting, the energy consumed by the capacitor array in the switching process of the SAR ADC is greatly reduced. Compared with the traditional switching algorithm, the switching algorithm of the invention saves 99.76% of the conversion energy and 75% of the capacitor area, and improves the economic benefit. In addition, the switching algorithm provided by the invention makes the output common-mode voltage of the capacitor array only change slightly when the lowest bit is converted, thereby greatly reducing the design complexity of the comparator.

The invention discloses a positioning method for a digital electric valve. A positioner consists of a control unit, an I/P electric conversion unit, a valve position feedback unit and a fault diagnosis unit. The positioning method includes the following steps: flow characteristic parameters of the positioner are configured; on the basis of providing the entire diversified flow characteristics and acting directions of an adjusting valve, correction is carried out aiming at work flow characteristic distortion caused by factors such as the change of the pressure drop ratio of the adjusting valve and the like; the valve position control of the adjusting valve is based on a Fuzzy-PI dual-mode non-interference switching algorithm; the fault diagnosis depends on internal relationships among a valve position given value, a valve position feedback value and valve film head pressure which are set by a control center, and a user selects to release or partially release the valve film head pressure when in valve stuck freeing operation according to the rule-based knowledge reasoning, so as to realize the fault diagnosis; the valve displacement/electric conversion of the valve position feedback unit depends on a non-contact magnetic sensitive potentiometer, the man-machine interaction adopts the touch screen technology, and the control unit accesses to a control network by an Ethernet interface.

The invention discloses a double-frequency WiFi intelligent switching algorithm based on a 2.4 G adaptive threshold value. The algorithm is used for wireless double-frequency terminal equipment supporting an 802.11 v wireless network protocol. By dynamically setting a frequency cutting threshold value of WiFi of a wireless terminal on a 2.4 G connection frequency point and fixedly setting the thefrequency cutting threshold value of the WiFi of the wireless terminal on a connection frequency point, so that the wireless terminal can be successfully switched to a proper frequency point when theWiFi needs frequency cutting, and meanwhile, the wireless terminal is ensured not to be switched back and forth at two frequency points. It is guaranteed that the routing device or the AP can have onefrequency point to be provided for the wireless terminal to be connected, and the user experience under double-frequency WIFI frequency switching is improved. Therefore, the routing equipment or theAP can process the switching of different terminals more smoothly, and the switching of the wireless terminal is smoother. Therefore, the algorithm has very high use value and popularization value.

The invention discloses an automatic control method for blast furnace top pressure in blast furnace coal gas residue pressure electricity generator, it uses automatic control software to realized the fluctuating real-time automatic control of pressure, thus ensures the TRT appliance can meet the demands of blast furnace refining process extremely. The method includes: (1) establishes mathematics and physics equation; (2) Xi parameter calculating and switching algorithm; (3) establishes automatic control system; (4) works out control software according to mathematics and physics equation and specialist algorithm. The invention can enhance the scientific content of TRT appliance product, enhances the competitive power of it. It solves difficulty in variable flow calculation and control technology, changes the analog control into digital control, and realizes the on-line supervising of pressure in TRT appliance.

The invention discloses an Internet of Things calculation task scheduling system and method. The system comprises a starting module, a task trigger frequency predication module, a task parameter measurement module, a task switching algorithm module, an auxiliary processor module and a main processor module, wherein the starting module is used for stating a node, the main processor module executes former multi-tasks and calculates execution time on executing the former multi-tasks for one time and task trigger situations; the task trigger frequency predication module predicates task trigger frequency for a period of time in future according to the task trigger situations; the task parameter measurement module performs measurement to obtain a plurality of parameters required by the task switching algorithm module according to the former multi-tasks; the task switching algorithm module evaluates whether the optimal execution mode of the next calculation task is a hardware task or a software task according to the task trigger frequency and the plurality of parameters; the auxiliary processor module executes the hardware task; the main processor module executes the software task. By means of respective advantages of the auxiliary processor module and the main processor module, real-time performance of the system is ensured, and overall power consumption of the node is the lowest.

The invention discloses a binary capacitor array applied to a near-threshold SARADC and a switching method with low power consumption thereof. By means of special construction of a core module thereof, namely a DAC capacitor array, the power consumption of the DAC part in the conversion process of the SARADC can be greatly reduced in combination with a provided new switching algorithm. Only two reference levels are adopted in the algorithm, such that the algorithm is applied to designing the SARADC under near-threshold voltage. Compared with the area of the capacitor array required by the ordinary two-level capacitor switching technology, by means of flexible application of united, split and floating capacitor switching technologies, the total area of the capacitor array is reduced by 50%.

The invention provides an antenna switching control method, a multi-antenna terminal and a computer readable storage medium. Aiming at a defect that an existing multi-antenna terminal frequently operates an antenna switching algorithm to carry out antenna switching so that power consumption is large, an antenna switching threshold during previous antenna switching is used to calculate the antenna switching threshold which needs to be satisfied when current antenna switching is performed again; when the antenna switching needs to be performed again, even if a signal parameter of each current antenna satisfies an initial antenna switching threshold, the antenna switching is not performed, and the antenna switching is performed again only when the signal parameter of each current antenna satisfies the calculated antenna switching threshold when the switching is performed again. With continuous operation of antenna switching, the antenna switching threshold maintains dynamic changes simultaneously so that an antenna switching process is delayed; a problem that the existing multi-antenna terminal frequently operates the antenna switching algorithm to carry out antenna switching so that power consumption is large is solved; control to a ping-pong effect in an antenna switching field is realized; and a usage experience of a user is enhanced.