68 results about "Time Protocol" patented technology

The invention relates to the technical field of Ethernet communication and digital information transmission, and discloses an Ethernet-based time synchronization acquisition method, device and equipment and a medium, and the method comprises the steps: obtaining initial network time based on a network time protocol and a precise time protocol; recovering the synchronous clock signal from the Ethernet physical layer signal and generating a trigger pulse signal aligned with a second boundary to generate second-level reference time; the trigger pulse signal and the synchronous clock signal are used for executing high-frequency counting accumulation to generate nanosecond-level fine time; performing frequency division processing on the synchronous clock signal based on the sampling rate configuration parameter to obtain a sampling driving clock; the analog-to-digital conversion unit is triggered at the effective jump edge of the sampling driving clock to sample and latch nanosecond-level fine time to generate a sampling timestamp, and the sampling timestamp is output in combination with sampling data. According to the method, time recovery, time refinement and sampling time locking are realized through a unified time base, so that sampling action and time counting are accurately aligned, and the data synchronization precision and consistency of distributed acquisition nodes are improved.

The invention discloses a time sequence synchronization method and system for data fusion of a multi-modal wearable sensor, a terminal and a storage medium. The method comprises the following steps: acquiring an absolute timestamp as a global clock source; taking the global clock source as a master clock of a precision time protocol, configuring the plurality of wearable sensors as slave clocks, and executing multiple rounds of message interaction between the master clock and the slave clocks through the precision time protocol to obtain a timestamp corresponding to each round of interaction; and calculating the current path time delay and the current clock offset according to the corresponding timestamps, carrying out iterative judgment on the current path time delay and the current clock offset according to a preset path time delay threshold value and a preset clock offset threshold value, and determining whether to correct the local clock according to the current clock offset according to an iterative judgment result. The slave clock and the global clock source achieve time sequence synchronization; and after time synchronization is achieved, phase alignment is carried out on the periodic data sampling tasks of the multiple wearable sensors. According to the invention, the time sequence synchronization precision is obviously improved.

The invention discloses a time synchronization method, a time synchronization system and a storage medium, and the method comprises the steps: receiving and fusing multi-source time signals at the same time, and obtaining a local time reference signal; calculating the frequency compensation amount of a local clock source in real time based on an LSTM model trained by using a local time reference signal; detecting whether the time signal is available, and determining to switch an atomic clock taming mode or a timekeeping mode based on a detection result; inserting a timestamp with femtosecond precision for the initial data message through the PIC to obtain a target data message; and sending the time synchronization information and the target data message to a 6G network node through a precision time protocol of the FPGA chip. According to the invention, on the basis that the satellite signal is taken as a time reference, two conditions that the satellite signal is available and unavailable are considered, and a local clock source and photon time service are adjusted in combination with a multi-source satellite signal fusion result, so that the time synchronization precision is improved, and the 6G network requirement is met.

The embodiment of the invention provides a differential relay protection device, equipment, system and method and a storage medium, the differential relay protection device comprises a clock module, the clock module is configured to create a first clock for the differential relay protection device, the first clock is configured in a precision time protocol domain, and the clock module is configured to create a second clock for the differential relay protection device, the second clock is configured in a precision time protocol domain; the second clock and the first clock operate independently; a power data obtaining module configured to obtain power data collected based on a second clock; and a processing module configured to perform a differential relay protection function through the first clock. According to the differential relay protection device disclosed by the invention, an independent precise time protocol domain can be configured for a differential relay protection function, so that power data synchronization is realized in a mode of low hardware cost, low system framework complexity, high flexibility and high operation stability, and the differential relay protection function is realized.

The invention discloses a task synchronization and scheduling method for compensating CAN bus clock drift, which relates to the technical field of industrial automation control, and comprises the following four steps: initializing a system, loading a real-time protocol stack, completing hardware self-inspection and clock calibration, and sending a ready signal after confirming that a link is smooth; performing synchronization parameter configuration and task planning, defining clock synchronization reference parameters, dividing four types of tasks and setting priorities; performing dynamic calibration and data buffering on master and slave clocks, broadcasting a synchronous message with a timestamp by a master station, correcting a local timer by a slave station through a soft phase-locked loop, and constructing an annular buffer area to realize time domain decoupling; task cooperative scheduling and abnormal fault tolerance are carried out, a control task is triggered based on a calibration clock, edge calculation is carried out to reconstruct a motion state and feed-forward compensation is carried out, a multi-dimensional state is monitored in real time, and a fault tolerance mechanism is triggered. According to the method, clock synchronization precision and control stability are greatly improved, bus bandwidth limitation is broken through, high dynamic tracking precision is achieved, and long-term stable operation of the system is guaranteed.

The invention discloses an internal delay calibration method for a network time protocol measurement device, which comprises the following steps of: establishing a reference signal 1PPS as a unified time reference; sending a synchronous message and outputting message record receiving time; measuring the moment when the synchronous message is received, and outputting the actual receiving time; comparing the message record receiving time with the actual receiving time, and outputting the internal delay of a receiving path; the slave clock sends a delay request message, and outputs the message to record the sending time; measuring the moment of sending the request message, and outputting the actual sending time of the request message; comparing the message record sending time with the actual sending time, outputting the internal delay of a sending path, and separating a stable delay component; and taking the internal delay of the receiving path and the sending path as input, compensating the master-slave clock deviation, and outputting the real time deviation of the master-slave clock. According to the invention, internal delay calibration of the measuring device is realized.

Industrial devices and edge compute platforms are configured to synchronize their internal clocks to provide a common sense of time across application and data acquisition tasks, thereby allowing for an inherent common understanding of time across the devices and data sets. The industrial devices can synchronize their internal clocks using Precision Time Protocol (PTP) or IEEE 802.1AS synchronization. The accurate time stamping achieved by this synchronization can yield more accurate analysis of data sets acquired from multiple devices, and greater fidelity and synchronization between a digital twin of an automation system and the physical system represented by the digital twin.

The invention discloses a method for smoothly switching a clock input source, an electronic device and a storage medium, and the method comprises the steps: selecting a precision time protocol (PTP) input source according to initial configuration, and carrying out the time synchronization; judging whether the pulse signal of the PTP input source within T time is normal or not; if the pulse signal of the PTP input source in the T time is normal, locking the PTP input source; and dynamically adjusting an OCXO (Oven Control Crystal Oscillator) input source according to the PTP timestamp of the PTP input source so as to carry out calibration, so that the pulse signal of the OCXO input source follows the pulse signal of the PTP input source.

Various aspects of the present disclosure relate to include a user equipment, UE, comprising at least one memory and at least one processor coupled with the at least one memory. The processor is configured to cause the user equipment to transmit a user plane QoS session configuration request, the request comprising first and second information. The first information indicates at least one of a type of media, a set of QoS parameters requirements, or a protocol description, for one or more media components of multimedia application data, and the second information indicates a PDU Set marking configuration identifying a PDU Set marking for the one or more media components. The PDU Set marking configuration comprises information elements corresponding to or indicative of a Real Time Protocol, RTP, header extension configuration used for marking PDU Set information.

The application belongs to the technical field of power grid testing, and provides an automatic testing method and system and an electronic device. In the automatic testing system: a test control terminal is connected with a dispatch plan simulation server, a network time protocol server and a power conversion system respectively, is used for automatically starting the dispatch plan simulation server and the network time protocol server according to a test case, dynamically generating at least one dispatch plan table according to the test case, uploading the at least one dispatch plan table to the dispatch plan simulation server, and simultaneously controlling the power conversion system and the network time protocol server to perform time synchronization; the power conversion system is connected with the dispatch plan simulation server and the network time protocol server respectively, is used for requesting a target dispatch plan table from the dispatch plan simulation server according to its own operation requirement, and controlling output power according to the obtained target dispatch plan table on the premise that time is kept consistent with the network time protocol server.

The invention discloses a networking delay dynamic sensing and intelligent compensation method for a distributed test system. According to the method, a technical system of'high-precision perception-intelligent prediction-dynamic compensation-robust guarantee 'is constructed aiming at the networking delay and time variation problem caused by fixed delay, variable delay and system-level errors in a distributed test system; a subnanosecond clock synchronization reference is established through an IEEE 1588 (PTP) precision time protocol; unidirectional delay accurate measurement is realized based on a PTP delay request-response mechanism; modeling and predicting the delay time sequence by adopting an ARIMA (Autoregressive Integrated Moving Average) model, and sending an instruction in advance through dynamic forward compensation so as to achieve a quasi-synchronization test; and the test continuity and the precision controllability when the network state dramatically changes are ensured by combining the self-adaptive model updating and abnormal backspacing mechanism. According to the method, the time sequence synchronization precision and the environmental adaptability of the distributed test system are remarkably improved, and the technical problem that a traditional method is difficult to deal with delay jitter and dynamic change is solved.

The present invention discloses a method and system for measuring the shortest two-way delay link of a time-sensitive communication network, belonging to the field of 5G communication technology. The time-sensitive communication network includes a plurality of communication terminals, a plurality of switches for realizing information transmission between different communication terminals, and a plurality of communication links composed of the plurality of communication terminals and the plurality of switches; wherein the plurality of communication terminals and the plurality of switches all have the time synchronization characteristics of the time-sensitive communication network, and time synchronization is realized by the generalized precise time protocol gPTP in the 802.1AS standard. The present invention can measure the time symmetry of the two-way link delay, and can use a genetic algorithm to measure the optimal sending and response links that meet the 802.1Qat protocol before the data traffic is sent. By improving the genetic algorithm, the efficiency of iterative convergence is improved.

The invention provides a polling interval adjustment method, device and equipment based on a time synchronization request. Comprising the following steps: acquiring a synchronization result of a time synchronization request and index values of a plurality of time synchronization indexes; wherein the time synchronization request is a request which is initiated by a network time protocol (NTP) server and is used for calibrating local time; determining a synchronization polling interval adjustment strategy according to the synchronization result and the index values of the plurality of time synchronization indexes; generating a new polling interval according to a polling interval adjustment strategy; and sending a time synchronization request to the NTP server according to the new polling interval, so that the NTP server calibrates the local time. According to the method provided by the invention, the waste of bandwidth and computing resources is reduced, and the time deviation is calibrated in time.

The application discloses a kind of multi-modal wearable sensor data fusion-oriented timing synchronization method, system, terminal and storage medium, the method includes: obtaining absolute timestamp as global clock source;Global clock source is as the master clock of precision time protocol, a plurality of wearable sensors are configured as slave clock, through precision time protocol, multiple rounds of message interaction are performed between master clock and slave clock, and the timestamp corresponding to each round of interaction is obtained;According to the corresponding timestamp, the current path delay and the current clock offset are calculated, and according to the preset path delay threshold and clock offset threshold, the current path delay and the current clock offset are iteratively judged, whether the local clock is corrected according to the current clock offset is determined according to the iterative judgment result, until slave clock and global clock source achieve timing synchronization;After achieving time synchronization, the periodic data sampling tasks of a plurality of wearable sensors are phase-aligned.The application significantly improves timing synchronization accuracy.

The invention discloses an edge device communication method and system based on a private communication protocol, and relates to the technical field of Internet of Things communication, and the method comprises the steps: building a real-time communication link between an edge device and a server side based on the private communication protocol; based on a precise time protocol, performing clock synchronization calibration on the edge device and the server side; preprocessing the original time sequence data based on the sliding window, and performing timestamp marking and data encapsulation to obtain encapsulated data; based on the real-time communication link, sending the packaged data to a server side by adopting a data frame format of a private protocol, so that the server side performs data integrity verification, consistency verification and data processing on the packaged data to obtain a data processing result; and receiving a data processing result pushed by the server through the real-time communication link, and maintaining the real-time communication link based on the data processing result. According to the invention, the technical problems of high synchronization delay and resource waste in the prior art are relieved.

The application relates to a BMC management and time transfer implementation method based on communication fusion, and belongs to the fields of time transfer and BMC health management. The BMC information management function realizes the collection and reporting of the voltage, current, temperature and other sensor values of each functional board card through RS485, I2C and other data transmission protocols, and simultaneously judges the current working state of the board card according to a preset threshold value; the RMC time serial port information receiving and processing function realizes the compatibility of three kinds of input time protocols by analyzing the RMC time statements received by the serial port; the PPS signal acquisition and serial port external time function realizes the external six-way RS422 time and one-way PTP time by setting an interrupt processing function, collecting the time data of the FPGA in time when the PPS signal occurs, editing the message according to the protocol and sending the data through the serial port. The application realizes the simultaneous operation of the BMC management and time transfer.

The application discloses a kind of methods and systems for fault root cause positioning of server cluster, it is related to network fault diagnosis technical field;The present application realizes microservice call chain, container index, nanosecond level synchronous collection of physical node and network data by precise time protocol, constructs consistent data set after entity association and standardization processing;Based on this, service-resource topology graph is dynamically constructed, and the inter-service call edge weight model is innovatively designed: the real-time load factor is fused, and the historical fault index attenuation and processed by Sigmoid function are superposed, and the weight is periodically updated to accurately quantify the influence strength between nodes;Topology graph is converted into Bayesian network;When fault occurs, three-stage pipeline is used to compress alarm, frequent item set is mined by bitmap index and parallel FP-Growth, and strong causal association item set is screened by combining topology edge weight and KL divergence;Strong causal alarm is taken as evidence, and probabilistic root cause ranking is output by reverse random walk sampling, to realize high-precision positioning of complex distributed system fault.

The apparatus includes a memory configured to store security information, and at least one processing core, configured to generate the security information by defining a security policy concerning user plane transfer of precision time protocol messages, and to instruct at least one network node to implement the security policy by transmitting the security information to the at least one network node.

The invention belongs to the field of precise time synchronization, and discloses a precise time protocol-based time synchronization method and a related system, which adopt a timestamp calculation mechanism between a master node and a slave node in the traditional PTP and introduce a multi-message sampling and normalized clustering analysis mechanism. Through extraction, calculation and normalization of sending and receiving timestamps in a plurality of message sampling periods, time deviation fluctuation caused by network jitter, asynchronous delay, random message congestion and other factors can be effectively eliminated, so that clock synchronization is more stable and accurate. According to the method, on the basis of calculating the clock skew and the link transmission delay, K-means residual error clustering optimization is further introduced. By grouping and clustering the time offset or the link delay data, abnormal deviation data and network burst delay data can be automatically identified, so that the robustness of synchronization parameter estimation is improved.

This application relates to the field of data synchronization technology and discloses a method, system, device, and medium for multi-camera timestamp synchronization. The method includes: embedding a physical world timestamp generated by a hardware clock synchronized based on the Precise Time Protocol (PTP) into the Network Abstraction Layer (NAL) unit of the Supplemental Enhancement Information (SEI) of an H.265 encoder as the global master time reference for multi-camera collaborative acquisition; adding a device ID field to the embedded SEI timestamp of each camera; subsequently, each camera performs video acquisition and encoding to obtain a video stream; parsing the SEI timestamp with the device ID from the video stream to establish a frame-level global time reference; extracting the SEI timestamps of each camera for real-time verification; if the verification passes, it is determined that the multi-cameras have achieved frame-level synchronization; a data loader reads a dataset in a specified format, parses and extracts the SEI timestamps from the dataset, compensates for time drift caused by system scheduling delays, and outputs synchronized data. This application improves the synchronization accuracy of timestamps.

Disclosed in the present application are an information processing method and apparatus, and a first device, a second device, a storage medium and a computer program product. The method comprises: a first device generating a first message and a second message on the basis of a first clock, and sending the first message and the second message to a second device, wherein the first message is associated with a third clock, and the second message is associated with a fourth clock; alternatively, acquiring a satellite time reference source signal, using the satellite time reference source signal to determine a second clock, generating a third message on the basis of the second clock, and sending the third message to the second device, wherein the third message is associated with the fourth clock, the third clock comes from the satellite time reference source signal, and the fourth clock comes from a precise time protocol (PTP) signal; acquiring first information from the second device, wherein the first information represents the difference between the third clock and the fourth clock; and using the first information to determine second information, wherein the second information represents the accuracy of the difference.

There is provided mechanisms for relative time error (TE) information distribution in a telecommunication network using a precision time protocol (PTP). A method is performed in a gateway device in a telecommunication network having hierarchical segments. The method comprises receiving TE information from a telecom grandmaster (T-GM) of the hierarchical segments. The method comprises preserving a total TE information of the received TE information. The method comprises resetting an accumulated path TE of the received TE information. The method comprises outputting an indication of the reset accumulated path TE and the preserved total TE information to a sub-segment of the hierarchical segments.

The application relates to the technical field of industrial smart grid, and discloses a device clock calibration method and device based on a protocol conversion gateway and equipment, the method comprises the following steps: a protocol conversion gateway receives a reference time value of a master clock through a precision time protocol interface; a preset mapping table is inquired according to the identification of a target device to obtain a communication protocol type and a time data address, so as to obtain a local clock value of the target device; the deviation between the local clock value and the reference time value is calculated to obtain a time offset; the time offset is converted into a corresponding clock adjustment instruction based on the communication protocol type and is issued to calibrate the clock of the target device. The protocol conversion gateway and the built-in mapping table are arranged in the embodiment, high-precision and unified clock calibration of heterogeneous devices with different communication protocols in a light storage and charging integrated power station is realized, and a reliable time reference is provided for multi-source data fusion and collaborative control of the light storage and charging integrated power station.

The application provides a communication method and device, and relates to the field of communication. The communication method comprises the following steps: a sending end obtains a first transmission resource corresponding to a service data unit through a medium access control entity; the medium access control entity determines a first time for generating a protocol data unit according to a time domain resource included in the first transmission resource, and the protocol data unit comprises at least one service data unit; and the sending medium access control entity generates the protocol data unit based on the first time. The first time for generating the protocol data unit to be transmitted first can be advanced, the service data unit with a smaller sequence number is transmitted first due to the smaller sequence number of the service data unit applied to the protocol data unit packaged first, and the transmission window of the sending end can be updated in time, the transmission of new service data units is started, and the transmission delay is reduced.

This application relates to the field of communication technology and discloses a clock synchronization guarantee method and apparatus, which can guarantee clock synchronization between a terminal device and a user plane function network element when their clocks are out of sync. The method includes: a clock management network element receiving a General Precision Time Protocol (gPTP) clock synchronization request from an application function network element, the gPTP clock synchronization request including the identifier of the target user plane function network element and the identifier of the target terminal device; when the clocks of the target user plane function network element and the target terminal device are out of sync, the clock management network element obtains the clock deviation between the target user plane function network element and the target access network device, the target access network device being the timing access network device for the target terminal device; the clock management network element sends the clock deviation to the target user plane function network element or the target terminal device, the clock deviation being used by the target access network device or the target terminal device for clock synchronization.

The present application discloses a distribution network data transmission method, apparatus, device and storage medium, which relates to the field of communication technology, including: generating a plurality of first keys and sending a first key parameter containing the first key to a preset distribution network master station, so that the distribution network master station generates a second key and generates a first identity certificate of the first distribution network substation based on the first key parameter and the second key; obtaining the first identity certificate sent by the distribution network master station, and judging whether the first identity certificate is valid; if valid, using the first identity certificate to communicate with the second distribution network substation to transmit data; if invalid, sending a certificate update request to the distribution network master station, so that the distribution network master station directly updates the timestamp of the first identity certificate based on the first key parameter and the second key using a preset time protocol. This application makes the identity cancellation and update process more convenient by only updating the timestamp in the identity certificate, avoiding the excessive time and power consumption caused by the secondary generation of keys.

The application discloses an asynchronous constant-time multi-element verifiable consensus method and device, which comprises the following steps: each node proposes a value; the node executes a corresponding reliable broadcast instance; after the node waits for n-f reliable broadcast instances to end, the node executes the following first loop: determining a common random number k; according to the corresponding reliable broadcast instance of the node k, running a re-vote binary consensus instance to determine the value reaching consensus in the re-vote binary consensus instance; if the value reaching consensus in the re-vote binary consensus instance of the node is 0, the node enters the next round of the current first loop; if the value reaching consensus in the re-vote binary consensus instance of the node is 1, the node waits for the output of the kth reliable broadcast instance, and the asynchronous constant-time multi-element verifiable consensus protocol reaches consensus on the output. The application provides an information theory security constant-time protocol.

The invention discloses an energy industry Internet unknown threat detection layered architecture design method and equipment. The method comprises the following steps: cooperatively collecting multi-source heterogeneous energy industry protocol data, obtaining a protocol document and capturing a real-time message; performing hierarchical cleaning on the data and intelligently dividing a data set; then, unknown protocol fields are complemented through Diffusion-BERT collaborative modeling, and boundaries are optimized and are subjected to hierarchical analysis; based on a self-supervised learning analysis protocol, classifying and verifying consistency; dynamically optimizing hyper-parameters and fine tuning of the model; and finally, the model is lightened and deployed to an industrial platform, protocol real-time analysis and unknown threat detection are realized, the problems of insufficient data support, poor protocol adaptation, update shutdown and difficulty in landing in the prior art are solved, and the energy industry Internet security is guaranteed.

Systems, computer program products, and methods are described herein for implementing real time protocol modifications for address resolutions protocols in a network environment. The present disclosure is configured to identify an address resolution protocol (ARP) cache table comprising an internet protocol (IP) address and a media access control (MAC) address for a communication mapping(s); determine a firewall property(ies) of the ARP cache table for the communication mapping(s); compare the firewall property(ies) to at least one normal firewall property and determine whether the firewall property(ies) is anomalous compared to the normal firewall property(ies); automatically execute a smart contract, wherein the smart contract comprises an authorization protocol(s) for the ARP cache table and an execution of a homomorphic encryption for the ARP cache table; and protect the ARP cache table based on the execution of the smart contract with the authorization protocol(s) and the homomorphic encryption.

Some methods for triggering a camera in an autonomous vehicle (AV). These methods include receiving, with a programmable circuit, universal precision time protocol (gPTP) information, the gPTP information for synchronizing the programmable circuit with a gPTP master clock (GM); generating, with a programmable circuit, a pulse per second (PPS) signal having a period of one second based on the gPTP time information; generating, using a programmable circuit, a synchronization signal having a period smaller than that of the PPS signal; generating, using a programmable circuit, a trigger signal based on the PPS signal, in which the cycle of the trigger signal is the same as the cycle of the synchronization signal; and transmitting, with the programmable circuit, a trigger signal to one or more cameras of the AV for triggering the one or more cameras to capture the one or more images. A system and a computer program product are also provided.