36 results about "Bandwidth measurement" patented technology

The invention relates to the field of data transmission, and particularly discloses a data bandwidth guarantee and encryption transmission system based on a tunnel technology, which comprises the following steps: through an intelligent preprocessing module, before a message enters a tunnel encapsulation process, carrying out strategy matching so as to identify a target flow, and accurately capturing an original length without any tunnel overhead; based on the original length, the system not only can perform fair and accurate bandwidth measurement and solve the problem that the actual available bandwidth of a user is damaged due to tunnel encapsulation overhead, but also can perform dynamic and probabilistic intelligent access decision by further combining the service priority of the message with the current network resource state, so that the network access efficiency is improved. Therefore, the communication quality of the high-value service is guaranteed preferentially when the network is congested. Finally, only the message which passes through the layer of accurate and intelligent screening can be sent to be encrypted and packaged.

The invention discloses a bandwidth determination method and device for a host channel adapter, and relates to the field of computers.The bandwidth determination method comprises the steps that a preset interface of an operating system is adopted to drive and directly access a hardware register of the host channel adapter through the host channel adapter, and data invisibility of an operating system layer in a remote direct memory access framework is penetrated; original values of a receiving byte counter and a sending byte counter maintained by firmware in a hardware register are accurately captured, and the byte increment change is dynamically calculated in combination with a preset time interval, so that the aim of millisecond-level real-time monitoring on the network traffic is fulfilled on the premise of not modifying a kernel and not intercepting a data packet; therefore, the technical effects of high-precision bandwidth measurement, ultra-low performance overhead, full-flow penetration capability and cross-platform expandability are realized, and the fault diagnosis and performance tuning efficiency of the distributed system is remarkably improved.

The invention belongs to the field of reconfigurable on-chip spectrometers, and particularly discloses a reconfigurable on-chip spectrometer based on a low-loss GST superlattice phase change material. According to the invention, the GST-SL2 material is combined with the double-cascade micro-ring array architecture, so that the performance of the device is improved in a breakthrough manner, a large amount of spectral response can be generated only through a limited number of micro-ring resonators on a chip, the flexible regulation and control of the spectral resolution and the working bandwidth are supported, and the customization requirements of different application scenes are met; a resolution regulation and control array is formed by cascading # imgabs0 first MRRs which are arranged at equal intervals in the extension direction of a bus waveguide, the lengths of resonance micro-rings of the first MRRs are increased progressively, and due to the cascading design, through the synergistic effect of the multiple MRRs, the overall regulation and control capacity is remarkably enhanced, and it is ensured that sampling points can uniformly cover the whole working bandwidth of an on-chip spectrometer; the measurement bandwidth regulation and control array divides the working bandwidth into a plurality of channels, the irrelevance of a system response function is successfully enhanced, and a reliable basis is provided for spectrum reconstruction.

The invention discloses a system memory peak bandwidth measurement method and electronic equipment, and relates to the technical field of bandwidth measurement, the memory bandwidth measurement process is optimized through cooperation of dynamic selection of a maximum width vector instruction, forced non-cache access and NUMA perception binding, and the bandwidth measurement efficiency is improved by utilizing the vector processing capacity of a CPU (Central Processing Unit). The data throughput of a single operation is improved to 512 bits or even higher, through cooperation of a non-temporary instruction and a memory barrier instruction, a cache level is bypassed, interference of cache hit or jitter on a measurement result is eliminated, it is ensured that the measurement result truly reflects the performance of a memory system, and the measurement accuracy is improved. Through an automatic NUMA binding mechanism, delay and congestion caused by cross-node access are avoided, and the accuracy, stability and repeatability of a test result are improved.

The invention discloses a high-integration-level miniaturized TMR magnetic field sensor and a use method thereof, relates to the technical field of electrical equipment measurement, and solves the problems that most existing TMR sensors in the prior art are discrete devices, the system integration level is low, and the noise immunity and the stability are not high in an electric power environment with high-frequency signals and strong electromagnetic interference. The TMR magneto-sensitive unit, the signal conditioning circuit and the analog / digital interface are highly integrated in the same package, and the size of the sensor is remarkably reduced while high sensitivity and broadband response are kept. Besides, by optimizing the magnetoelectric structure design and the signal chain topology, background noise and bias drift are reduced, the measurement precision is improved, and the method is particularly suitable for high-density layout, complex electromagnetic environments and high-bandwidth measurement scenes. According to the invention, a better current measurement solution is provided for novel power systems such as a smart power grid, a modular power electronic device and a distributed energy system.

The embodiment of the invention provides a communication processing method and device based on quantum key distribution, equipment and a medium, and belongs to the technical field of communication. The method comprises the following steps: obtaining a bandwidth state value at the current moment through a bandwidth adaptation module according to an obtained bandwidth measurement value at the current moment and a bandwidth measurement value before the current moment; the quantum key distribution rate at the current moment is obtained through a bandwidth adaptation module based on the bandwidth state value at the current moment, the existing quantum key compression fragment size and the quantum key distribution maximum rate, and the quantum key distribution rate at the current moment is matched with the bandwidth state value at the current moment; and distributing the quantum key compression fragments to the target device through a quantum key distribution module according to the quantum key distribution rate at the current moment. According to the embodiment of the invention, the requirements of a low-bandwidth equipment scene and a scene with unstable bandwidth on a quantum key distribution technology can be met.

The application discloses a kind of wideband signal multi-domain parameter simultaneous measurement method based on space-time joint processing, belong to electronic reconnaissance field, first to radar signal AD sampling, after polyphase filtering, filter data are obtained;Filter data are respectively carried out time domain and space domain FFT transformation, and the spectrum sequence of space domain focusing is obtained;Direction correction is carried out to the problem of the spectrum sequence of space domain focusing exists direction deviation, and space-time two-dimensional spectrum matrix is obtained;Space-time two-dimensional spectrum matrix is projected in space domain, and through threshold setting and peak value screening, the angle of arrival measurement value is obtained;Center frequency and bandwidth measurement value are obtained by threshold design and peak value screening using angle of arrival measurement value to extract specific angle of arrival sequence.

The invention provides a device and method for measuring the real-time analysis bandwidth of a broadband real-time signal analyzer, and the device comprises a broadband signal generation device and a broadband sampling oscilloscope, and the broadband sampling oscilloscope is used for calibrating a broadband multi-sine pulse modulation signal generated by the broadband signal generation device. Measuring the real-time analysis bandwidth of the broadband real-time signal analyzer according to the standard signal; the method comprises the following steps: generating waveform data of a multi-sine pulse signal by using a control machine, uploading the waveform data to a baseband signal generation module to generate a multi-sine pulse modulation signal, converting the multi-sine pulse modulation signal to a measurement frequency band through an up-converter, and calibrating the formed broadband multi-sine pulse modulation signal by using a broadband sampling oscilloscope, and then the real-time analysis bandwidth and in-band frequency response of the broadband real-time signal analyzer are measured. The real-time analysis bandwidth of the measured equipment can be obtained only through one-time measurement, so that the measurement times are reduced, the real-time performance is enhanced, and the measurement result is more reliable.

The invention relates to the technical field of bandwidth measurement, in particular to a data-driven bandwidth measurement method, which comprises the following steps of: acquiring a write-in information construction sequence, screening a stable number accumulation threshold trigger interval, extracting a bandwidth record association context and outputting a result. According to the method, active identification of stable data behaviors is realized by sorting and screening the write-in time difference sequence and combining the write-in length trend and the time interval fluctuation characteristics, and the data behaviors are identified by tracking the continuous numbering record and the original write-in content and establishing the mapping relation between the data behaviors and the bandwidth result. The problem that a traditional method depends on an external test packet and interferes with service data due to a measurement behavior is effectively avoided, the real-time performance and context correlation of bandwidth measurement are improved, and the recognition capability for the network state continuity and the transmission load trend is enhanced by limiting a fluctuation interval and a data boundary threshold constraint. And dynamic continuous perception and fine description of the real bandwidth are realized.

The application discloses a response bandwidth measuring device and method of a capacitance type blade tip clearance measuring system based on a varactor, the capacitance type blade tip clearance measuring system is composed of a capacitance sensor, a measuring system host and an upper computer which are sequentially connected, the measuring system host comprises a signal demodulation module and an acquisition module, the capacitance sensor is composed of a sensor probe and a three coaxial cable which are connected with each other, the response bandwidth measuring device is connected with the three coaxial cable through an SMA joint after replacing the sensor probe, and a varactor is adopted to simulate the capacitance change caused by the blade tip sweeping through the capacitance sensor probe; the response bandwidth measuring device is composed of a varactor D, a resistor R1, a capacitor C1 and a capacitor C2; the two ends of the capacitor C2 connected in parallel with the varactor D are connected with the resistor R1 and the capacitor C1 in series respectively, the capacitor C1 is connected with the three coaxial cable, and the input end of the response bandwidth measuring device is connected with the resistor R1.

This invention relates to a multi-point concurrent UDP bandwidth measurement method, apparatus, and storage medium, applied in the field of network communication technology. It includes: concurrently connecting a client to multiple speed test servers and aggregating and calculating test data from all paths, effectively avoiding interference from momentary congestion of a single network path or load bottlenecks of a single server on the measurement results, enabling the measurement results to more realistically and stably reflect the client's local network access limit capacity; employing a two-stage rate control algorithm combining "target verification and binary search," first attempting to verify the user's expected target bandwidth. If network conditions are good, the test can be completed in one go, greatly improving efficiency; if the target is not achieved, binary search is used to quickly approach and converge to the limit bandwidth value within a fixed number of rounds. This automated detection process significantly improves testing efficiency and automation.

Embodiments of the present application provide a downlink interference avoidance scheduling method, device, apparatus and storage medium. The method comprises: determining the position of a target terminal; if the target terminal is located at the edge area of an interference cell, configuring a plurality of channel state information reference signal (CSI-RS) measurement bandwidths, wherein the plurality of CSI-RS measurement bandwidths comprise a full bandwidth CSI-RS measurement bandwidth and at least one CSI-RS measurement bandwidth with the size of the bandwidth of the interference cell; determining the interference level of the physical resource block (PRB) corresponding to the bandwidth of the interference cell based on the measurement values on the plurality of CSI-RS measurement bandwidths reported by the target terminal; and allocating resources for the data to be transmitted by the target terminal based on the interference level of the PRB corresponding to the bandwidth of the interference cell. The embodiments of the present application can effectively identify and avoid downlink interference, and improve the throughput of the serving cell.

The invention relates to a multipoint concurrent UDP (User Datagram Protocol) bandwidth measurement method and device and a storage medium, which are applied to the technical field of network communication, and comprise the following steps of: concurrently connecting a plurality of speed measurement servers through a client, and carrying out aggregation calculation on test data of all paths, the interference of instantaneous congestion of a single network path or the load bottleneck of a single server on the measurement result is effectively avoided, so that the measurement result can reflect the ultimate bearing capacity of the local access network of the client more truly and more stably; a two-stage rate control algorithm combining'target verification and binary search 'is adopted, firstly, a target bandwidth expected by a user is tried to be verified, if the network condition is good, the test can be completed at a time, and the efficiency is greatly improved; and if the target is not achieved, the target is quickly approached and converged to the limit bandwidth value in a fixed and few rounds through binary search, and the automatic detection process remarkably improves the test efficiency and the automation degree.

The application discloses a response bandwidth measuring device and method of a capacitive blade tip clearance measurement system based on an analog switch, the capacitive blade tip clearance measurement system is composed of a capacitive sensor, a measurement system host and an upper computer connected in sequence, the measurement system host comprises a signal demodulation module and an acquisition module, and the capacitive sensor is composed of a sensor probe and a three-coaxial cable connected with each other; the response bandwidth measuring device is used for replacing the sensor probe and is connected with the three-coaxial cable through an SMA joint, the response bandwidth measuring device adopts an analog switch to simulate the capacitance change caused by the blade tip sweeping through the sensor probe, and the analog capacitance type blade tip clearance measurement system is simulated as an input; the response bandwidth measuring device is composed of an analog switch, a first capacitor C1 and a second capacitor C2, the analog switch is connected in parallel with the second capacitor C2 and then connected in series with the first capacitor C1, and the analog switch is simplified as a single-pole double-throw switch S and an equivalent capacitor C s(off) .

The present application discloses a bandwidth determination method and apparatus for a host channel adapter, which relates to the field of computers. The method comprises: using a preset interface of an operating system to directly access the hardware registers of a host channel adapter via a host channel adapter driver, thereby penetrating the data invisibility of the operating system layer in a remote direct memory access architecture. Furthermore, by accurately capturing the original values ​​of a receive byte counter and a send byte counter maintained by firmware in the hardware registers, and dynamically calculating byte increments based on preset time intervals, the method achieves the purpose of millisecond-level real-time monitoring of network traffic without requiring kernel modifications or intercepting data packets. This method thus realizes the technical effects of high-precision bandwidth measurement, ultra-low performance overhead, full traffic penetration capability, and cross-platform scalability, significantly improving the efficiency of fault diagnosis and performance tuning of distributed systems.

The application belongs to the field of reconfigurable on-chip spectrometer, and specifically discloses a reconfigurable on-chip spectrometer based on a low-loss GST superlattice phase change material. The application combines the GST-SL2 material with a double-cascade micro-ring array architecture to achieve a breakthrough in device performance, and a large number of spectral responses can be generated with only a limited number of micro-ring resonators on the chip, while supporting flexible regulation of spectral resolution and working bandwidth to meet the customized needs of different application scenarios. A resolution regulation array is composed of a plurality of first MRRs arranged at equal intervals along the extension direction of the bus waveguide, and the resonant micro-ring lengths of the first MRRs increase. This cascade design significantly enhances the overall regulation capability through the synergistic effect of multiple MRRs, ensuring that the sampling points can uniformly cover the entire working bandwidth of the on-chip spectrometer. The measurement bandwidth regulation array divides the working bandwidth into multiple channels, successfully enhancing the non-correlation of the system response function and providing a reliable foundation for spectral reconstruction.

The utility model discloses a response bandwidth measuring device of a capacitance type blade tip clearance measuring system based on a variable capacitance diode, the capacitance type blade tip clearance measuring system is composed of a capacitance sensor, a measuring system host and an upper computer which are connected in sequence, and the measuring system host comprises a signal demodulation module and an acquisition module. The capacitance sensor is composed of a sensor probe and a tri-coaxial cable which are connected with each other, the response bandwidth measuring device is connected with the tri-coaxial cable through an SMA connector after replacing the sensor probe, and a variable capacitance diode is adopted to simulate capacitance change caused by the fact that a blade tip of a rotating blade sweeps the capacitance sensor probe; the response bandwidth measuring device is composed of a variable capacitance diode D, a resistor R1, a capacitor C1 and a capacitor C2. Two ends of the capacitor C2 connected in parallel with the variable capacitance diode D are respectively connected in series with the resistor R1 and the capacitor C1, the capacitor C1 is connected with the tri-coaxial cable, and the input end of the response bandwidth measuring device is connected with the resistor R1.

The present application relates to the technical field of bandwidth measurement, in particular to a data-driven bandwidth measurement method, comprising the following steps: obtaining write information to construct a sequence, screening a stable number accumulation threshold trigger interval, extracting bandwidth record associated context and outputting results.In the present application, through sorting and screening the write time difference sequence, combining the write length trend and time interval fluctuation characteristics, the active identification of stable data behavior is realized, the mapping relationship between data behavior and bandwidth result is established by tracking continuous number records and original write content, the problem of dependence on external test package and interference of measurement behavior on business data of traditional method is effectively avoided, the real-time and context correlation of bandwidth measurement are improved, through limiting the fluctuation interval and data limit threshold constraint, the identification ability of network state continuity and transmission load trend is enhanced, the continuous perception and fine description of real bandwidth dynamics are realized.

The utility model discloses a response bandwidth measuring device of a capacitance type blade tip clearance measuring system based on a bipolar plate rotating structure, the blade tip clearance measuring system is composed of a capacitance sensor, a measuring system host and an upper computer which are connected in sequence, and the measuring system host comprises a signal demodulation module and an acquisition module; the response bandwidth measuring device comprises a sensitive polar plate, a receiving polar plate, a rotating table, a displacement table and a blocking capacitor; the rotating table comprises a rotating shaft, a mounting seat and a controller; the controller is used for controlling the rotating speed of the rotating shaft and displaying the rotating speed in real time; the supporting rod on the mounting seat is sleeved with a displacement table; the rotating shaft is rotatably mounted on the mounting seat; the sensitive polar plate is fixed on the rotating shaft as a rotating component; the receiving polar plate is fixedly arranged on the displacement table and is positioned above the sensitive polar plate; the distance between the receiving polar plate and the sensitive polar plate is changed by adjusting the height of the displacement table; and the receiving pole plate is sequentially connected with a blocking capacitor and a core pole of a tri-coaxial cable.

The invention discloses a sub-second level network bandwidth measurement method and system. The method specifically comprises the following steps: S1) collecting network environment configuration of a client, and obtaining a broadband distribution probability in a corresponding scene according to the network environment configuration; s2) selecting a test server; s3) selecting a maximum modal broadband value in the broadband distribution probability as an initial rate R0 of bandwidth detection, and starting to transmit data; s4) acquiring the detection rate value of each broadband sampling point, comparing the acquired detection rate value with the broadband detection rate value for judgment, and executing S5) according to the judgment result; and S5) feeding back the measured bandwidth estimation fed back in the step S4) to the server side, and updating the bandwidth expectation distribution corresponding to the network environment configuration. According to the method provided by the invention, the client bandwidth distribution can be priori estimated based on the client network configuration and the previous bandwidth measurement data according to the client bandwidth distribution estimation module, and the priori information is utilized to guide the network bandwidth measurement to be quickly and accurately carried out.

Embodiments of the present application provide a bandwidth measurement method and apparatus. A head node obtains a measurement packet, the measurement packet comprising a measurement identifier and the remaining available bandwidth of a first interface of the head node, and the measurement identifier being used for instructing to measure the remaining available bandwidth of a first forwarding path; and the head node sends the measurement packet by means of the first interface corresponding to the first forwarding path. A protocol packet is extended, and the protocol packet carries the identifier for instructing to measure the remaining available bandwidth, so that a forwarding node is triggered to automatically collect the remaining available bandwidth of a local interface, thereby reducing the implementation complexity of obtaining the remaining available bandwidth of the forwarding path.

The invention provides a pulse parameter high-precision measurement method for multi-modulation radar signals, and relates to the field of radar signal processing, and the method comprises the steps: obtaining original IQ data, and carrying out the preprocessing; performing dynamic threshold pulse edge detection on the preprocessed original IQ data, and extracting time domain parameters; and judging the modulation type of the signal according to the time domain parameter, and automatically routing the preprocessed original IQ data and the corresponding time domain parameter to three parallel special high-precision bandwidth measurement channels through a decision point according to known modulation type information to obtain a bandwidth measurement result. The method has the remarkable beneficial effects of high precision, high reliability, high automation degree, high practicability and the like.

A method for deploying and linking a ROS application package in a ROS-based distributed computed environment including multiple hosts includes: deploying a ROS application package to a specific host and predicting performance of a topic generated by a ROS-based module to which the ROS application package is deployed; measuring a maximum bandwidth between hosts for a plurality of hosts by using a network bandwidth measurement tool; generating localhost mode setting information based on the predicted performance; generating host-to-host middleware setting information based on the predicted performance; and transmitting a deployment command including the localhost setting information and the host-to-host middleware setting information to a target host.

The invention discloses a polarization multiplexing multi-range metasurface dispersion spectrum analysis device. The device comprises a collimator, a polarization multiplexing metasurface and a photoelectric detector which are arranged in sequence, the collimator collimates the optical signal to be measured to form a collimated light beam; and the polarization multiplexing metasurface applies different wavelength-related phase regulation on the collimated light beam and then focuses the collimated light beam to different spatial positions on the photoelectric detector, so that multi-range spectral analysis is realized. According to the invention, multiplexing of the multi-range spectral analysis function of the polarization dimension is realized, and the function integration level of the device is improved; multi-spectral range setting is supported, and customized resolution and wide bandwidth measurement can be realized; the device is compact and small in structure, and can be used as an on-chip spectrometer or a portable spectrum detection device.

The invention discloses a video code rate control method and device, equipment and a storage medium. Comprising the following steps: analyzing a received video segment by adopting a general media application format CMAF to determine a bandwidth measurement value sequence; respectively inputting the bandwidth measurement value sequence into a first prediction model and a second prediction model to obtain a first bandwidth prediction value and a second bandwidth prediction value; determining a target bandwidth prediction value based on the first bandwidth prediction value and the second bandwidth prediction value; and adjusting the code rate based on the target bandwidth predicted value, and adjusting the playing speed of the video based on the delay information. According to the video code rate control method provided by the embodiment of the invention, the video quality and the playing fluency are ensured while the low delay is ensured.

A charged particle beam apparatus includes a charged particle beam source, a charged particle optical system, a charged particle detector, and a controller. The charged particle beam source generates a beam of primary charged particles. The charged particle optical system directs the beam of primary charged particles at a sample surface. The charged particle detector detects secondary charged particles associated with interaction of the primary charged particles with the sample surface. The controller determines an image of the sample surface based on the detected secondary charged particles. The image includes an array of pixels. The controller also determines an autocorrelation function between a signal represented by a line of the pixels and delayed copies of the signal. The controller also determines a bandwidth of the charged particle detector based on the autocorrelation function.

The application discloses a kind of available bandwidth measurement method, device, system, node and readable storage medium, belong to communication technical field.The available bandwidth measurement method includes: source node sends probe data packet to destination node, including first information in the probe data packet, the first information is used to indicate the first available bandwidth determined according to the available bandwidth of the source node;Receiving the reply data packet sent by the destination node;Second information is included in the reply data packet, and the second information is used to indicate second available bandwidth, when the available bandwidth of destination node is greater than or equal to the first available bandwidth, second available bandwidth is equal to the first available bandwidth;When the available bandwidth of destination node is less than the first available bandwidth, second available bandwidth is equal to the available bandwidth of destination node;Second available bandwidth is determined as the available bandwidth of transmission link between source node and destination node.Thereby, the available bandwidth of network can be accurately measured using a small amount of measurement flow.

The application discloses a system memory peak bandwidth measurement method and electronic equipment, and relates to the technical field of bandwidth measurement. The application optimizes a memory bandwidth measurement process by cooperating with a dynamically selected maximum width vector instruction, forced non-cache access and NUMA awareness binding. The application improves single operation data throughput to 512 bits or even higher by using the vector processing capability of a CPU. The application bypasses a cache level by cooperating a non-temporal instruction with a memory barrier instruction, eliminates the interference of cache hits or jitter on measurement results, ensures that measurement results truly reflect the performance of a memory system itself, avoids delay and congestion caused by cross-node access through an automatic NUMA binding mechanism, and improves the accuracy, stability and repeatability of test results.

The present application provides a method, apparatus and product for dynamically measuring link bandwidth. The method is applied to the field of bandwidth measurement technology and includes: in the startup phase, every time an RTT time elapses, control the length of the congestion window to increase by a target packet length step by step until the increase in the throughput of the congestion window stops rising and is less than the first threshold, and enter the emptying phase; in the emptying phase, every time an RTT time elapses, control the length of the congestion window to decrease by a target multiple step by step until the decrease in the RTT time of the congestion window is less than the second threshold and stops decreasing, and enter the dynamic measurement phase; in the dynamic measurement phase, every time an RTT time elapses, determine the adjustment ratio of the congestion window at the current RTT time, and adjust the length of the congestion window according to the adjustment ratio of the congestion window; repeat the above step to adjust the length of the congestion window multiple times until the change amount of the length of the congestion window remains stable, and determine the link bottleneck bandwidth.

The application discloses a kind of optical domain channelization microwave signal time-frequency analysis device and method, by based on the parallel measurement principle of three optical frequency comb, for the frequency-time mapping based on sweep signal and filter structure The optical domain analog time-frequency conversion of realization provides new measurement performance promotion dimension, i.e. optical frequency comb spectral line number.Different optical frequency comb spectral line is responsible for the measurement of the time frequency information of different frequency bands of the signal to be measured.Signal to be measured different frequency band time frequency information is mapped into time domain by different carrier modulation electric domain pulse, through the sampling of electric domain pulse, and combining the channel label of carrier identification, the time-frequency information of different channels mixed in time domain is separated through subsequent processing, and further the complete time frequency information of the signal to be measured is obtained.The application introduces new measurement performance promotion dimension by optical frequency comb, can realize the promotion of time-frequency conversion analysis bandwidth, time resolution and frequency resolution, reduce the dependence on large-bandwidth high-speed sweep signal source when system large-bandwidth measurement.