70 results about "Random delay" patented technology

The invention discloses a network security protection method, system and device, and a medium, particularly relates to the technical field of network information security, and is used for solving the problem that the attack of constructing a covert channel by using a time interval is difficult to find in time in the prior art. Through sliding window segmentation and multi-granularity time standardization, extracting multi-scale time sequence characteristics of network traffic; classifying time sequence modes by using a bidirectional long short-term memory network, and separating normal protocol traffic from covert channel behaviors; further constructing a cross-scale causal transfer graph through symbolization discrete mapping, and combining continuous coherence analysis to quantify the traffic topology stability to form a multi-dimensional anomaly criterion to improve the detection precision; aiming at covert channel confrontation requirements, dynamic random delay parameters are generated based on Poisson distribution, a target data stream is injected, channel time synchronism is destroyed, a protocol baseline template is updated adaptively, and it is ensured that traffic after interference still conforms to protocol statistical characteristics.

The invention relates to the technical field of power system control, solves the problems of network attack, limited bandwidth and transmission delay of a power system in a signal transmission process and conservative DET parameter selection and controller design, and particularly relates to a power system dynamic event triggered load frequency control method under Dos attack and random delay. Comprising obtaining a continuous time system parameter matrix; setting an event triggering threshold function; state parameters facing Dos attack and random time delay conditions are set; constructing a state feedback controller; and collaborative design optimization is carried out by applying a GA optimization algorithm. Compared with a traditional control method, the method has the advantages that on the premise of ensuring the stability of the system, by optimizing event triggering conditions, the communication requirement and bandwidth occupation are remarkably reduced, the utilization efficiency of communication resources is improved, network congestion and delay possibly caused by frequent communication are reduced, and the service life of the system is prolonged. And the operation efficiency of the whole power system is improved.

The invention relates to a master-slave communication technology, and discloses an automatic slave address allocation method of a master-slave communication system and the master-slave communication system, and the method comprises the following steps: when all slave addresses need to be reallocated, a host sends a first broadcast frame containing a first instruction identifier and a random seed; and after receiving and analyzing, each slave generates random delay and a slave address in combination with the unique identifier of the slave and the random seed, and sends a response frame containing the slave address and equipment information to the host according to the random delay. And the host receives the response frame, updates the slave equipment information table and establishes a special communication link for the slave. And when a new slave is accessed, the host sends a second broadcast frame containing a second instruction identifier, a random seed and an allocated address list. And the slave with the allocated address does not respond, the new slave generates an address sending response frame according to a rule, and the host establishes a link for the new slave. The invention further discloses a computer readable storage medium. The invention aims to improve the efficiency of allocating addresses to the slave by the master-slave communication system and facilitate the expansion and access of the new slave.

The invention provides an underwater multi-robot distributed elastic positioning method and system, and relates to the field of underwater robots. Establishing a kinematic model of the target robot and a measurement model of monitoring node fusion distance, depth and attitude information; when the state variation of the target robot exceeds a preset threshold value, communication is triggered; identifying a random delay state of a measurement signal by adopting a binary indicative function, dividing a scene according to a relationship between the current moment and the total time length of a task, and converting random delay information into a non-delay equivalent sequence; on the basis of the kinematic model, the measurement model and the non-delay equivalent sequence, delay channels are selected in different scenes to execute state prediction and elastic gain correction, and a state estimation value of the target robot is obtained; wherein the tight upper bound of the positioning error covariance matrix is constructed, and the optimal positioning gain is solved to iteratively optimize the elastic gain. By adapting time-varying delay and optimizing gain control errors, efficient cooperative positioning in a complex environment is ensured, and reliable pose information is provided for underwater tasks.

The invention relates to the technical field of data lines, and particularly discloses a data line system and a data line for intelligently switching data transmission and charging, and the system comprises a dual-core synchronization management module which is used for enabling dual cores to enter an initial detection state through encryption synchronization signaling when equipment is connected; the asynchronous signal processing module is used for generating state judgment parameters through multi-scale sliding window processing and time-frequency domain feature fusion; the consensus decision arbitration module outputs a backtracking trigger signal through dynamic projection transformation and self-adaptive threshold comparison; the state backtracking recovery module is used for generating a retry instruction with a random delay period based on the historical backtracking success rate and the signal quality evaluation; the safety mode control module is used for identifying dominant features by analyzing historical failure records and switching to a safety operation mode; through distributed dual-core cooperative processing and an intelligent fault recovery mechanism, the technical problems of confusion of protocol stacks and deadlock of a state machine in a complex electromagnetic environment are solved, and the anti-interference capability and reliability of the system are improved.

The invention relates to the technical field of information fusion, in particular to a robust filtering method for solving uncertainty of one-step random observation time delay, which comprises the following steps of: taking multiplicative noise, one-step random time delay, data packet loss, continuous loss observation and uncertain noise variance which are dependent on a system state and a state in an observation matrix into consideration; specifically, based on a maximum and minimum robust estimation principle, a CI fusion Kalman estimator (a predictor, a filter and a smoother) and two FCI fusion Kalman estimators are provided. According to the method, an augmentation method and a virtual noise method are combined, a robustness proving method based on permutation matrixes and a Lyapunov equation is introduced, it is proved that the proposed fusion estimator has robustness by defining different permutation matrixes, and in addition, through an application example of autoregressive moving average signal processing, the robustness of the fusion estimator is improved. It is verified that the robust local and fusion signal estimation problem can be solved through the state estimation method, and therefore solid practical application support is provided for the system modeling result.

The invention discloses a federated learning time series data analysis method based on shuffling differential privacy, which comprises the following steps that: a central server initializes global model parameters and distributes an initial model to all federated learning clients; each client uses a local time sequence data training model, calculates a gradient, then cuts the gradient, and adds Laplacian noise; the client uploads the disturbed gradients to a shuffling device, and the shuffling device allocates random delay time to each gradient and disrupts an uploading sequence to realize privacy amplification; the central server aggregates the gradients processed by the shuffling device to generate a global gradient, and broadcasts the updated model parameters to the client; repeating the above steps to perform iterative training, and tracking privacy budget consumption in real time through a privacy accounting method until a preset privacy budget threshold value or model convergence is reached; according to the invention, privacy amplification is realized, and noise injection is reduced.

The application discloses a kind of based on time random number identification sequence's internet of things node adaptive access method, comprising the following steps: S1, node initialization resource;S2, node generates identification sequence X and is packaged with initial number and sends;S3, gateway verifies node message after extracting identification sequence X and searches idle number;S4, gateway generates identification sequence Y after random delay and is packaged with identification sequence X and number and sends;S5, node verifies identification sequence X in message and extracts identification sequence Y and number;S6, node will new number and identification sequence Y package and send;S7, gateway verifies number and identification sequence Y in node message and sends response package back;S8, gateway waits for node to resend to judge registration completion.The method does not need floating-point operation unit and other additional hardware and software cost requirements, deployment is simple, stability is good, can greatly reduce the operation cost of artificial operation and maintenance and avoid the waste or conflict situation of node number resource caused by misoperation.

The invention relates to the field of information security passwords, and discloses a password security measurement method based on a large language model and a multi-side channel differentiator, which comprises the following steps: analyzing the characteristics of SPA according to simple energy, and designing various side channel differentiators such as segmentation, preprocessing, data statistics, dimension reduction, clustering and continuous rule limitation based on common analysis means; when the password equipment runs a target algorithm, acquiring side information data such as illumination, energy or electromagnetism in the running process of the password equipment; based on the collected side information data, different side channel distinguishers are selected, expert version cues with side channel analysis knowledge are formed through fusion, and analysis targets and tasks are described. According to the method, security automatic measurement can be carried out on password equipment with multiple protection means such as random delay and mask by utilizing a general large language model without expert participation or professional analysis tools, and compared with a common SPA security measurement method, the false alarm rate gt is reduced under the condition of the same sample size; the sample size is reduced by gt under the same accuracy rate; and therefore, the accuracy of the side channel security measurement is greatly improved, and the cost of resources such as labor and the like is reduced.

The present invention relates to a collision-free connection method and system for large-scale low-power Bluetooth devices, and relates to the field of connection control of large-scale low-power Bluetooth devices. For all low-power Bluetooth slave devices, when the predetermined fixed broadcast time interval arrives, the random delay time generation algorithm calculates the target random delay time for itself by using the parameters generated by the offline dynamic parameter generation library; each low-power Bluetooth slave device starts broadcasting to attempt to establish a connection with the Bluetooth gateway after the target random delay time, and disconnects the connection after successfully interacting with data and enters the low-power mode; the low-power Bluetooth slave device repeats the next round of broadcasting and data transmission according to the preset time period. The randomization of the broadcast start time in this application greatly reduces the communication collision risk generated when multiple low-power Bluetooth slave devices attempt to connect to the Bluetooth gateway at the same time, ensuring that even in a high-density device network environment, an efficient connection process can be maintained.

The invention provides a laser radar point cloud anti-crosstalk method and system based on random time delay, and relates to the technical field of point cloud processing. Comprising the following steps: adding a random time delay amount on the basis of an original emission period of each emission channel of the laser radar, and obtaining a plurality of corresponding delay emission times when each emission channel emits laser in each period; each emission channel of the laser radar is controlled to emit laser according to the corresponding multiple delay emission times; acquiring an echo signal received by each receiving channel of the laser radar when the laser is emitted according to the delay emission time; and filtering the obtained echo signal to obtain anti-crosstalk point cloud data. According to the method, random time delay is increased when a single channel emits laser, so that points, reaching adjacent receiving channels, of the emission channel are dispersed, anti-crosstalk of the laser radar point cloud is achieved, the recognition precision of the laser radar point cloud is improved, and the problem that noise points generated between different channels are recognized as real objects through a sensing algorithm, and misrecognition is caused is solved.

The invention discloses a linear system delay probability estimation method based on an improved Kalman filtering algorithm, and belongs to the technical field of signal processing. By introducing the discrete Bernoulli random variable and constructing the layered Gaussian state space model, complex probability distribution is converted into an easy-to-process form, efficient joint estimation can be conveniently realized, unknown and time-varying delay probability can be adaptively estimated on line, the precision and stability of state estimation can be improved, and the method is suitable for large-scale popularization and application. The method is suitable for a linear system with one-step random delay measurement, and is especially suitable for state estimation of a visual inertial odometer (VIO) system.

This application discloses a verification method, system, device, and storage medium for a device under test (DUT), applied in the field of testing technology. The method includes: configuring N verification tasks for N operating modes of the DUT, with each verification task configured with a random delay; placing the N verification tasks into a first queue; selecting one verification task from the first queue; determining the cumulative number i of times the currently selected verification task has been selected from the first queue, and sending its i-th step to the DUT; after the DUT completes the execution of this step, after the random delay of the verification task, returning the verification task to the first queue, and repeating the operation of selecting one verification task from the first queue until all steps of each verification task have been executed by the DUT; and determining the verification result of the DUT. Applying the scheme of this application can effectively realize the verification of the DUT, improve the verification efficiency, and avoid errors.

The application is suitable for the technical field of rodent control, and provides a mouse driving method based on a dynamic composite sound field and an intelligent mouse driving device. The method comprises: when detecting rodent activity, outputting an ultrasonic electric signal and a simulated audio electric signal; performing random delay processing and random gain processing on the ultrasonic electric signal; performing random delay processing, random gain processing, three-dimensional sound field rendering processing and dynamic volume adjustment processing on the simulated audio electric signal; driving a plurality of surround-arranged ultrasonic transducers and synchronously driving a plurality of surround-arranged loudspeakers to generate a dynamic composite sound field. The application can form a dynamic composite sound field with physiological interference and psychological deterrence by performing random delay, gain processing, spatialization processing and dynamic processing operations on the ultrasonic signal and the simulated audio signal respectively, and cooperatively outputting by the surround-arranged sound generating units, avoid the mouse driving blind area, and is not easy to be adapted by rodents, thereby improving the instant effect and durability of mouse driving.

The invention discloses a steer-by-wire automobile stability control method, device and equipment considering time delay. The method comprises the steps that a steer-by-wire system model is established; establishing a non-linear time delay model existing in steer-by-wire; based on the steer-by-wire system model, performing linearization processing on the nonlinear time lag model to obtain a transfer function of a steer-by-wire actuating mechanism containing time lag; and based on the transfer function of the steer-by-wire executing mechanism containing the time delay, stability control is conducted on the automobile. Therefore, aiming at the delay problem existing in a steer-by-wire system, compared with passive control based on a wave variable theory and a dissipation theory, the operability is reduced, and the tracking precision cannot be ensured; according to the method, on the premise that the robust stability of the system is guaranteed, the tracking capacity, the anti-interference capacity and the like of the system under the condition of random delay can be guaranteed at the same time.

The invention discloses a multi-access point competition response method based on random time delay. The invention relates to the technical field of wireless communication, and solves the problems of wireless node retransmission, delay increase and even connection interruption caused by high conflict probability when a plurality of wireless access points receive signals at the same time. The method comprises the following steps: a wireless node terminal sends an access point competition inquiry instruction after being online, and all wireless access points in a channel receive the instruction; the wireless access point replies response information carrying the signal strength information to the wireless node terminal by adopting random time delay response; and the wireless node terminal selects the wireless access point with the highest received signal strength as the main access point. The communication reliability of the equipment can be improved, the problems of data loss, time delay and the like are avoided, and the transmission efficiency is improved. And for a low-power-consumption wireless node, the radio frequency retransmission power consumption of wireless node equipment can be further reduced, and the effective use time is prolonged.

The invention belongs to the technical field of charging piles, and particularly relates to a power-frequency small-current leakage protection low-frequency conducted interference resistance detection system and method. The system comprises a random phase-shift frequency-conversion oscillation module for converting low-frequency conducted interference of 10kHz-150kHz into an unstable equivalent low-frequency signal by introducing random delay to control the charging overturning time of a magnetic core; the dot frequency comb filtering module is used for filtering the current signals of a plurality of preset power frequency harmonic frequency points and outputting a maximum effective value; and the power frequency current judgment module is used for judging whether the effective value continuously exceeds a threshold value (such as 5mA) and reaches stable time (such as 50ms) so as to distinguish real electric leakage and interference. The method is realized based on the system. The core advantages of the invention lie in that misoperation caused by low-frequency conducted interference can be effectively avoided, the reliability of high-sensitivity (5mA) electric leakage protection in a complex electromagnetic environment (such as electric vehicle charging) is significantly improved, and the strict safety standard requirements such as UL2231 and the like are met.

The invention relates to the technical field of optical fiber communication, in particular to an optical time domain reflectometer and a laser driving method thereof. The method is applied to the optical time domain reflectometer. The optical time domain reflectometer comprises a laser emitting assembly and a laser receiving assembly. The laser driving method of the optical time domain reflectometer comprises the following steps: acquiring a random delay duration, and driving a laser emission assembly to emit target laser based on the random delay duration; and informing a laser receiving assembly of the random delay duration, so that the laser receiving assembly can receive reflected laser of the target laser according to the random delay duration, and obtaining a target signal in the reflected laser through a coherent accumulation method. According to the invention, the OTDR module can be miniaturized and the cost can be reduced.

The present application discloses a side channel attack detection method and system based on deep learning, the method comprising: deploying a side channel analysis detection system to capture the side channel timing data during encryption operation in real time; inputting the side channel timing data into an optimized deep learning model to identify abnormal side channel activities; and dynamically adjusting the execution of the encryption algorithm based on the abnormal side channel activities. The disclosed embodiment can identify slight deformations in the presence of random delay protection measures, thereby accurately predicting the key execution sequence of the encryption algorithm, with stronger adaptability and higher detection accuracy.

An embodiment of the present invention provides a code generation method, apparatus, device, and readable storage medium. Based on a target syntax tree corresponding to the code to be verified, a target module node corresponding to a module to be verified in the code to be verified is determined; a delay queue node corresponding to a target delay queue is inserted into the target module node, and nodes related to a specified signal group in the target syntax tree are modified; the target delay queue is used to randomly delay the output of the specified signal group; the modified target syntax tree is converted into target code including the target delay queue; the target code is used to verify the interface timing function of the module to be verified. Through the method of syntax tree instrumentation, it is convenient to inject errors into the module to be verified, reducing the complexity of error injection and the requirement threshold for the professional skills of verification personnel. At the same time, there is no need for verification personnel to write test cases corresponding to different transmission delays one by one, saving verification time and improving verification efficiency to a certain extent.

The application discloses a communication method based on a 485 bus and a smart home system, and relates to the technical field of communication, and aims at solving the problem of low communication efficiency of the 485 bus caused by the random delay method for solving the 485 bus conflict in the traditional 485 bus multi-master communication process. The method comprises the following steps: when a plurality of master devices receive data error indication sent by a slave device, at least two master devices determine delay time for delaying data transmission according to the device address of the self device, and the remaining master devices except the at least two master devices enter a waiting transmission state. A first master device with the shortest delay time among the at least two master devices sends data to the slave device again when the first delay time of the self device arrives, and if the plurality of master devices all receive data correct indication, the master devices except the first master device among the at least two master devices send data again.

The invention discloses an optical communication device configuration and authentication method and device, an optical communication device and an optical communication system, and belongs to the technical field of optical communication. The configuration method comprises the following steps: a first optical communication device determines a random time delay parameter, wherein the random time delay parameter is less than 48 [mu] s; and sending a broadcast message to a plurality of second optical communication devices, the broadcast message carrying configuration information, and the configuration information being used for configuring a random time delay parameter. The first optical communication device can flexibly configure the random time delay parameter of the second optical communication device through the broadcast message.

The application discloses a method for multi-access point contention response based on random time delay. The application relates to the technical field of wireless communication, and solves the problems of wireless node retransmission, increased delay, and even connection interruption caused by high conflict probability due to the fact that multiple wireless access points simultaneously receive signals. The method comprises the following steps: after a wireless node terminal is online, an access point contention inquiry instruction is sent, and all wireless access points in a channel receive the instruction; the wireless access points reply response information carrying signal strength information to the wireless node terminal by using random time delay response; and the wireless node terminal selects a wireless access point with the highest received signal strength as a main access point. The application can improve the communication reliability of equipment, avoid problems such as data loss and time delay, and improve transmission efficiency. For low-power wireless nodes, the radio frequency retransmission power consumption of the wireless node equipment can be further reduced, and the effective use time is prolonged.

Method, modules and a system formed by connecting the modules for controlling payloads are disclosed. An activation signal is propagated in the system from a module to the modules connected to it. Upon receiving an activation signal, the module (after a pre-set or random delay) activates a payload associated with it, and transmits the activation signal (after another pre-set or random delay) to one or more modules connected to it. The system is initiated by a master module including a user activated switch producing the activation signal. The activation signal can be propagated in the system in one direction from the master to the last module, or carried bi-directionally allowing two way propagation, using a module which revert the direction of the activation signal propagation direction. A module may be individually powered by an internal power source such as a battery, or connected to external power source such as AC power.

This invention provides a method, system, and storage medium for vector signal analysis and processing at the uplink signal receiver of a wideband code division multiple access (WCDMA) wireless communication system. It is used to perform frequency domain and modulation domain index measurements, channel decoding, and other processing on the uplink signal of a WCDMA wireless communication system. The beneficial effects of this invention are: by using an R&S cellular test instrument to sample WCDMA uplink signals, the various processes of this invention were debugged. Under conditions of AWGN, DC bias of -39dB, random delay, and random frequency offset, the uplink signal waveform of WCDMA FDD was generated. Simulation processing of various processes, including synchronization, carrier frequency offset estimation and compensation, descrambling, equalization, and despreading, was performed. The DC bias and error vector amplitude (EVM) of the uplink signal were measured, and the downlink physical control channel (DPCCH) and downlink physical dedicated channel (DPDCH) were demodulated and decoded. The CRC check of the DPDCH channel passed, verifying the correctness of each process.

Embodiments of the present application provide a ranging method, an electronic device and a storage medium, wherein the method comprises: sending a ranging instruction to a second node, wherein the ranging instruction at least comprises a ranging time slot indication, and the ranging time slot indication is used to indicate a time region in a corresponding logical frame structure in which the second node sends data in response to the ranging instruction; receiving ranging response content sent by the second node, wherein the ranging response content at least comprises random delay information of the second node and response duration information of the second node; determining equivalent delay information of the second node according to a sending time of the ranging instruction, a receiving time of the ranging response content, the ranging time slot, and the ranging response content; and sending the equivalent delay information to the second node. The embodiments of the present application can implement device ranging in a low-delay scenario, without interrupting normal service transmission, and can guarantee the stability of service transmission.

The invention relates to the field of encryption processing, and provides a PCIe-based hardware acceleration AES remote dynamic encryption method and system. The method comprises the following steps: generating an initial encryption key, and transmitting the initial encryption key to a local host to obtain local key data; sending the to-be-encrypted data to the FPGA hardware module, and performing encryption processing on the to-be-encrypted data through a pipeline to obtain encrypted output data; during encryption processing, receiving updated key information through the double-buffer key storage structure, and switching keys through the updated key information to obtain dynamically updated encryption configuration; performing randomized adjustment on the time sequence characteristics and the power consumption characteristics in the pipeline encryption processing process to generate an encryption execution environment; and performing encryption processing on the encrypted output data based on the encryption execution environment and the dynamic update encryption configuration to obtain final output data. On-line dynamic updating of the secret key is achieved through a double-buffering secret key storage structure, the PCIe bus bandwidth is fully utilized in combination with a full-assembly-line encryption architecture, and side channel attacks are effectively resisted through random delay insertion and a power consumption balancing mechanism.

The invention discloses a multi-device pairing method and communication method for time division multiplexing in the same channel by using codes, and the pairing method comprises the steps: each first device obtains an idle first code, and then enters a pairing mode to monitor a pairing request by using a pairing code; the second device obtains an idle second code, and then enters a pairing mode by using the pairing code to send a pairing request; after receiving the pairing request, each first device sends a pairing response after random delay, the second device sends a pairing confirmation request based on the pairing response, and the at least one first device replies the pairing confirmation response based on the pairing confirmation request. According to the application, pairing is carried out by using the same pairing code, the pairing process can be more convenient and accurate, and at the same time, by setting the random delay, at least one of the plurality of first devices is ensured to serve as the third device to complete pairing with the second device.

The invention discloses a channel determination method and device, a computer storage medium and electronic equipment. The method comprises the following steps: in response to a startup instruction, generating first random delay time within a preset range; the first random delay time is different from random delay time generated by other equipment; and after the first random delay time is over, wireless channel configuration processing is started, and a working channel is determined. By adopting the method, the stability of the wireless network can be ensured under the condition that a plurality of devices exist in the same scene, and the anti-interference capability of the network is improved.

The present application relates to the technical field of sensor connection control, and particularly relates to a wireless connection method of a power sensor, which comprises the following steps: each sensor is activated and parameter configured respectively after arriving at a scene, each sensor takes the time of completing parameter configuration as an initial start time T1; all the sensors are grouped, and each sensor in each group is respectively set with a time offset T2=T g +G i ×T s , wherein T g is a group wake-up period of a corresponding sensor in a group, G i is a group number of the corresponding sensor in the group, and T s is an inter-group step length of the corresponding sensor in the group; each sensor is respectively increased with a random delay T3, and the random delays of each sensor in the same group are not repeated; a wake-up period T of each sensor is T1+T2+T3, each sensor is started after being woken up according to the wake-up period, a main device is wirelessly connected with a corresponding sensor after receiving, and the sensor is restored to a sleep state after sending state data.