55 results about "Network Time Protocol" patented technology

The invention discloses a cross-device clock correction method supporting accurate synchronization of meters, and aims to improve the data time consistency among multiple meter devices and meet the requirements of high-precision electric power measurement and event analysis. The method comprises the following steps: acquiring a network time protocol timestamp and a first sampling time sequence in a reference meter, generating a clock reference signal, and broadcasting the clock reference signal to a corrected meter; comparing the corrected meter with a local second sampling time sequence, and calculating a clock skew coarse value vector; further performing wavelet decomposition on the offset coarse value, extracting to form a drift feature vector, fusing the drift feature vector with a historical template, and calculating a unified correction parameter set by using a Bayesian recursion method; and generating a correction pulse sequence carrying a delay residual compensation code based on the parameter set, sending the correction pulse sequence to a corrected meter, calling an interpolation compensation function to construct a piecewise polynomial drift compensation table, and finally realizing dynamic correction and cross-device accurate synchronization of a local real-time clock.

The invention discloses a multi-stage scheduling architecture control method based on a TSN network. Efficient management of network resources is realized through modular cooperation. The time synchronization calibration module periodically calibrates the difference of multiple clock sources by using an improved network time protocol and jitter monitoring to ensure the time unification of the whole network; the priority analysis module divides data streams according to a reference value, and determines time slot distribution of key and non-key streams; and the traffic peak period scheduling module dynamically adjusts resources by using a time triggering algorithm to ensure key data transmission. Meanwhile, the real-time path optimization module deals with delay exceeding based on a Dijkstra algorithm, the intelligent load balancing module is combined with a random forest algorithm to deal with an overload problem, and the rapid fault switching and isolation module realizes rapid fault response through redundant paths and topology analysis. And iteratively adjusting the parameters according to the key indexes. According to the method, full-process closed-loop control from time reference unification to dynamic resource scheduling and fault processing is realized, and the transmission stability and the resource utilization rate of the TSN network are effectively improved.

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.

According to one embodiment, an Information Handling System (IHS) includes a memory to store a secure event log associated with one or more attributes of the IHS, and computer-executable code to obtain a system time from a system clock of the IHS, obtain a network time from a network time protocol (NTP) server, and compare the system time against the network time. When the obtained system time does not match the obtained network time, set a system clock attack chain vector in the secure event log and generate an Indicator of Attack (IoA) report based at least in part, on the system clock attack chain vector.

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.

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 application provides a multi-sensor image and position attitude information synchronous transmission method, and belongs to the technical field of embedded systems. A system control unit acquires time from an upper computer through a network time protocol, and performs time synchronization with each sensor through a second pulse signal. The system control unit sends an external trigger signal to control sensor imaging, and records current time, position attitude and angle data to a circular buffer queue. When the sensor is imaging, the exposure time is superimposed on the image. An image processing unit parses the exposure time from the image and compresses the image, and then sends the image and the exposure time to the system control unit. The system control unit searches for corresponding position attitude and angle information from the circular buffer queue according to the nearest neighbor method, and then sends the information to the upper computer together with the image data. The application ensures the synchronization of the images of each sensor and the position attitude information at the time of imaging through the corresponding time information, and eliminates the influence caused by image processing and transmission delay.

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.

Embodiments of the present application provide a reference time determination method and device, electronic equipment and storage medium. The method is applied to a network time protocol (NTP) server. The NTP server is configured with a GPS module. The method comprises: obtaining an update period for a reference time; obtaining satellite time and a current number of searched satellites by the GPS module according to the update period, and obtaining a local system time; determining whether the number of satellites is greater than or equal to a preset value; if the number of satellites is greater than or equal to the preset value, using the satellite time as the reference time; and if the number of satellites is less than the preset value, using the local system time as the reference time. The method can continuously provide stable and accurate reference time for the NTP server.

The invention provides a high-performance timestamp signing and issuing method based on a national cryptographic algorithm, and the method comprises the steps: receiving a timestamp signing and issuing request, and analyzing a request parameter; high-precision time synchronization information is obtained through the network time protocol server; after the request parameter and the time synchronization information are combined, digest calculation is carried out by using a national cipher SM3 algorithm to generate a digest value; signing the digest value by using a secret key of a timestamp signing and issuing mechanism by adopting a national secret SM2 algorithm; the timestamp information is integrated and coded, a timestamp in a standard format is packaged, and the timestamp is signed and issued to a requester; wherein the timestamp information comprises time synchronization information, an abstract value, a signature and information of a timestamp issuing mechanism. According to the invention, the quick and safe generation and verification of the timestamp are realized, and the dual requirements of high performance and high security of the timestamp service in the fields of e-government affairs, e-commerce, intellectual property protection and the like are met.

The invention provides a method and a device for monitoring longitudinal dynamic performance of a heavy-load freight train, and the method comprises the steps: carrying out time synchronization based on global navigation satellite system time and a network time protocol, and collecting signals of a force transducer, a vibration acceleration and a displacement sensor on a coupler; acquiring coupler longitudinal force, longitudinal vibration acceleration, coupler longitudinal displacement and coupler transverse displacement data of multiple sections of the heavy-load freight train on the basis of signals of the force transducer, the vibration acceleration and the displacement sensor; obtaining a transverse component force based on the coupler longitudinal force, the coupler transverse displacement and the coupler deflection radius; obtaining unit displacement longitudinal force based on the coupler longitudinal force and the coupler longitudinal displacement; by means of time synchronism, the distribution condition of the maximum value of coupler longitudinal force, longitudinal vibration acceleration, transverse component force and unit displacement longitudinal force of each section in the time period from pressure reduction to recovery of the truck pipe pressure is analyzed; and judging whether the longitudinal dynamic performance of the heavy-load freight train is normal or not according to the distribution condition.

The invention specifically discloses a multi-camera vehicle statistics and deduplication method based on improved Kalman filtering, and relates to the technical field of intelligent traffic monitoring. The method comprises the following steps: S1, performing time baseline estimation by using a network time protocol and local time service to obtain a cross-camera unified time axis and complete space calibration; s2, performing single-view-field trajectory generation by using target detection and time sequence association to obtain continuous observation input; s3, performing state prediction and adaptive updating by using multi-model Kalman filtering to obtain robust state estimation in an asynchronous and shielding scene; s4, performing cross-view-field matching by using space-time mapping and appearance fusion to obtain a unique identity and de-duplication judgment; and S5, summarizing results by using track fusion and index calculation to obtain global flow and operation characteristics and finish interface output. According to the method, the accuracy and robustness of multi-camera vehicle statistics in a complex scene are remarkably improved, and reliable technical support is provided for intelligent traffic control.

This invention relates to the field of network time synchronization technology, and discloses a network time synchronization method, system, storage medium, and electronic device for bypassing UDP port blocking. The method includes: sending a time synchronization request to a Network Time Protocol (NTP) server through a User Datagram Protocol (UDP) port to detect the reachability of the NTP primary channel; when the NTP primary channel is determined to be unreachable, generating a query domain name containing a first time parameter to form a Domain Name System (DNS) query message encapsulating the time synchronization request; constructing a DNS secure transmission backup channel and sending the DNS query message to the target server; receiving the DNS response message returned by the target server and extracting a second time parameter from it; calculating the clock offset between the client and the target server based on the first and second time parameters, and adjusting the local system clock accordingly; the above method achieves secure and reliable network time synchronization under UDP port blocking.

The invention discloses a time synchronization method, device and equipment and a computer readable storage medium, which are applied to the technical field of computers, and comprise the following steps: when a substrate management controller is normally connected with a network time protocol server, obtaining standard time from the network time protocol server; when the substrate management controller is not normally connected with the network time protocol server, standard time is acquired from the database server; the database server is an intermediate scheduling and storage node for centrally storing time synchronization related data of the baseboard management controller; and updating the local time of the baseboard management controller according to the obtained standard time. According to the method, the mode that a traditional BMC is only connected with an NTP server directly for synchronization is broken through, the database server is designed as a core scheduling node, double links with NTP direct connection synchronization as a main link and database scheduling and network BMC node indirect synchronization as an auxiliary link are achieved, and the synchronization failure probability caused by a single NTP link fault is reduced on the aspect of architecture.

The invention relates to an NTP server selection method and device and computer equipment, and relates to the technical field of computer networks. The method comprises the following steps: acquiring a plurality of network time consumptions of each candidate network time protocol (NTP) server; wherein the network time consumption of each candidate NTP server is determined according to a timestamp for sending a timing request to the candidate NTP server and a timestamp for receiving server time fed back by the candidate NTP server based on the timing request; determining an evaluation parameter for representing the stability of the corresponding candidate NTP server according to the plurality of network time consumptions of each candidate NTP server; according to the determined evaluation parameters, selecting a target NTP server from the candidate NTP servers; wherein the target NTP server is used for performing time synchronization on a plurality of vehicles. By adopting the method, the appropriate NTP server can be selected during time synchronization of a plurality of devices in a computer network, so that the network time consumption difference of time calibration of different devices is reduced.

The invention discloses a network real-time time acquisition method and device, equipment, a medium, a product and a vehicle, and relates to the technical field of vehicles. The network real-time acquisition method comprises the steps that a network real-time acquisition request sent by a target application service is received, and the target application service is any application service in a vehicle; in response to the network real-time acquisition request, the network real-time is determined according to the current time and time deviation of the node where the target application service is located, the time deviation is calculated in advance according to the first real-time of the network time protocol server when the node is in the first time, and the first time is the time before the current time; and feeding back the network real-time time to the target application service. Through the scheme disclosed by the invention, the requirement of the service depending on the network real-time time in the node can be met.

The invention discloses a rescue data real-time synchronization method and system based on a multimode communication link, and relates to the technical field of aviation medical rescue. Comprising the following steps that: portable vital sign monitoring equipment and an airborne communication gateway execute millisecond-level time synchronization through a network time protocol, accurately calibrate a time difference between the portable vital sign monitoring equipment and the airborne communication gateway, and establish a unified system time reference; on the basis of a unified time reference, the portable vital sign monitoring equipment configures parameters according to medical standards, collects original vital sign data and generates a data packet; the technical key points are as follows: a redundancy technical system of a multimode link dynamic scheduling integrated Bluetooth P2P double-buffering mechanism is adopted, the technical combination solves the common severe network problem in helicopter rescue, avoids data loss or communication interruption, can realize zero loss of vital sign data even in an extreme network interruption scene, and improves the reliability of helicopter rescue. The survivability of the system in a complex environment is greatly improved, the data integrity is greatly improved, the use effect is good, and the system has a good use prospect.

The invention discloses an intelligent equipment management method and system for 5G Internet of Things, and relates to the technical field of equipment management, and the method comprises the steps: collecting environment video data and environment audio stream data in real time through 5G network connection and installation of an RGB monitoring camera and a microphone array, and carrying out the noise reduction processing through Gaussian filtering and spectral subtraction, and a network time protocol is configured to realize accurate perception of the environment. An RGB monitoring camera and a microphone array are connected through a 5G network, environment video data and environment audio stream data are collected in real time, noise reduction processing is carried out, environment features are extracted through Canny edge detection, frequency spectrum feature extraction is carried out on the audio data, the extracted features are normalized through a local sliding window, and the image quality is improved. And dynamically selecting a multi-modal response by combining context factors, establishing a management behavior classification framework of the equipment, selecting management behaviors through a decision tree, defining an environment state space and the management behaviors, and optimizing execution of the management behaviors of the equipment through a reward signal.

The embodiment of the invention provides time synchronization equipment and method for automatic driving, a vehicle and a storage medium. The time synchronization equipment comprises a time source component which comprises a plurality of time sources which at least comprise a global navigation satellite system time source, a real-time clock time source and a network time protocol time source; and a control unit including an output port coupled to the automatic driving processor and a plurality of input ports coupled to the plurality of time sources, respectively, the control unit is suitable for acquiring time information from at least one of the global satellite navigation system time source, the real-time clock time source and the network time protocol time source according to the available conditions of the global satellite navigation system time source, the real-time clock time source and the network time protocol time source; and the acquired time information is sent to the automatic driving processor through the output port. Therefore, the accuracy of time synchronization of all the devices in the vehicle can be improved, and meanwhile the architecture of the automatic driving controller is simplified.

Systems, methods, articles of manufacture, and apparatus for end-to-end hardware tracing in an Edge network are disclosed. An example compute device includes at least one memory, instructions in the compute device, and processing circuitry to execute the instructions to, in response to receiving detecting an object having a global group identifier, generate monitoring data corresponding to a respective process executing on the compute device, the monitoring data including a process identifier, index the monitoring data having the process identifier to the corresponding global group identifier, synchronize a time stamp of the monitoring data to a network time protocol corresponding to the global group identifier, and transmit the indexed and synchronized monitoring data as tracing data in to the a tracing datastore.

The application discloses a network time protocol service publishing method and electronic equipment, and relates to the technical field of cloud computing, and comprises the following steps: constructing a first image for providing a network time protocol service and a second image for configuring the network time protocol service; loading the first image and the second image into corresponding containers to construct a first container and a second container; obtaining an address identifier of the network time protocol service in the first container, and writing the address identifier into configuration data of the second container to obtain the address identifier and publish the corresponding network time protocol service. The application solves the technical problems that when multiple virtual machines are run on the same physical host, performance may be reduced and network delay may be caused due to system resource competition, compatibility is poor, it is difficult to drive adaptation and cross-platform management, and the like, and achieves the technical effects of improving architecture flexibility and security, enhancing operation and maintenance automation, reducing system resource consumption, and being suitable for a wider application scenario.

The embodiment of the invention provides an information processing method, electronic equipment and a storage medium. Accurate time service can be carried out when a vehicle runs to a signal shielding scene. The information processing method comprises the following steps: in response to detection of loss of a global navigation satellite system (GNSS) signal, timing is carried out based on a local crystal oscillator from a first moment, and the first moment is determined at least based on the GNSS signal before loss; and in response to the fact that the timing result of the local crystal oscillator reaches the target timing moment, a target correction moment is determined based on the target timing moment and a network time protocol (NTP) moment, and the NTP moment is obtained from an NTP server through a wireless communication link provided by the base station.

Disclosed are a method for configuring a reference time by a first device in a wireless communication system and a device therefor according to various embodiments. Disclosed are a method and a device therefor, the method comprising the steps of: configuring a first reference time on the basis of a network time protocol (NTP); receiving a first message from a second device; adjusting the first reference time based on the NTP to a second reference time based on a global positioning system (GPS) time on the basis that information on the GPS time is included in the first message; and transmitting a second message on the basis of the second reference time.

The application provides a multimodal data time synchronization, labeling and edge inference method and system, and relates to the technical field of cognitive evaluation. The multimodal data time synchronization, labeling and edge inference method comprises the following steps: collecting multimodal data; using a global logical clock + network time protocol + sliding window drift correction method to align the time of the multimodal data; identifying three dimensions of a task phase, a behavior event and an emotional state, and outputting three types of annotation labels; deploying an edge inference model, and automatically triggering cloud review when the confidence is lower than a threshold; generating a unique timestamp and a task identification for each collected frame, and establishing a unified log database in the cloud. The application combines a time sequence correction algorithm and AI model annotation logic in depth, realizes millisecond-level time alignment and intelligent labeling of multimodal data, and solves the technical problems of asynchronous data, high delay and large amount of manual labeling in the cognitive evaluation and rehabilitation training scene.

The invention provides a timestamp marking method, a clock synchronization method and device and electronic equipment, and relates to the technical field of communication. In the application, firstly, a network time protocol (NTP) message sent by a terminal device is received, or an NTP response message sent by a management board is received, then a receiving timestamp of the NTP message or a sending timestamp of the NTP response message is marked, and the receiving timestamp of the NTP message is marked when the NTP message sent by the terminal device is received through a line card. And the sending timestamp of the NTP response message is marked when the NTP response message sent by the management board is received, so that relatively large time delay generated when the NTP message and the NTP response message pass through the CPU-LC1 of the line card can be eliminated, and the time for the NTP message to reach the marked time of the server and the time for the server to send the NTP response message to the client are more accurate; and thus, the time synchronization error between the client and the server is reduced.

The invention relates to a vehicle timing method and device, relates to the technical field of vehicles, is applied to a server, and comprises the steps: obtaining a plurality of network consumed time reported by each preset vehicle; wherein each network time consumption is determined according to a timestamp for sending a timing request to a target network time protocol (NTP) server and a timestamp for receiving server time fed back by the target NTP server based on the timing request; constructing a plurality of candidate time consumption intervals according to the plurality of network time consumptions corresponding to each preset vehicle; determining a target time consumption interval from a plurality of candidate time consumption intervals according to the number of network time consumption belonging to each candidate time consumption interval in a plurality of network time consumption corresponding to each preset vehicle; and issuing a vehicle timing instruction carrying the target time consumption interval to each preset vehicle, so that each preset vehicle performs vehicle timing based on the target time consumption interval. By adopting the method, under the condition that multiple vehicles are subjected to vehicle timing, the time difference between the vehicles after vehicle timing is reduced, and the time consistency of the vehicles is improved.

The invention discloses a network time protocol service publishing method and electronic equipment, and relates to the technical field of cloud computing, and the method comprises the steps: constructing a first mirror image used for providing a network time protocol service and a second mirror image used for configuring the network time protocol service; loading the first mirror image and the second mirror image into corresponding containers, and constructing a first container and a second container; and obtaining the address identifier of the network time protocol service in the first container, writing the address identifier into the configuration data of the second container so as to obtain the address identifier, and issuing the corresponding network time protocol service, thereby solving the problems of performance reduction and network delay possibly caused by system resource competition when a plurality of virtual machines are operated on the same physical host. The technical problems of poor compatibility, difficulty in driving adaptation, cross-platform management and the like are solved, and the technical effects of improving framework flexibility and safety, enhancing operation and maintenance automation, reducing system resource consumption and being wider in application scene are achieved.

The present application discloses a time synchronization method, apparatus, management controller, medium and product. A processor, a first clock source and a second clock source are deployed in the management controller. The time accuracy of the first clock source is higher than that of the second clock source. When it is detected that the external Network Time Protocol (NTP) server is in an unavailable state, the clock signal output by the first clock source is transmitted to the second clock source. The second clock source updates the current time data according to the clock signal output by the first clock source, and continuously monitors the frequency deviation of the first clock source. When the frequency deviation is large, it indicates that the accuracy of the clock signal of the first clock source has decreased. At this time, the internal phase-locked loop of the second clock source is used to provide the clock signal, and the current time data is updated based on this clock signal. Through the master-slave clock dynamic switching mechanism of the first clock source and the second clock source, it is ensured that accurate time information can still be provided to the server by the management controller when the external NTP server is unavailable.

Provided is a system 10 system for synchronised telematic music collaboration, the system comprising at least two MIDI-enabled user processing systems 12.1 arranged in signal communication with a control server 18 via the internet 16. The remote server 18 is configured to, upon request, create a shared collaboration session on each user processing system 12.1, each session linked to the control server 18 by an assigned UDP and TCP port allocated MIDI channels, and to establish a UDP MIDI data stream with each session via UDP port, and to establish a multiplexed TCP control MIDI data stream with each session via said TCP port. The control server 18 is further configured to configure each session periodically to transmit a local timestamp signal based on Network Time Protocol (NTP), and to exchange all MIDI data for the session via both allocated UDP and TCP ports. In this manner, real-time music is shareable between sessions via both UDP and TCP MIDI data streams with the TCP control MIDI data stream useable to synchronise said shared UDP and TCP MIDI data streams via UDP and TCP MIDI data stream and periodic local timestamp signal comparison.

The present application provides a method, device, equipment and storage medium for calibrating the time of a vehicle domain controller, including: calibrating the microprocessor in the vehicle domain controller, and using the calibrated microprocessor to calibrate the microcontroller in the vehicle domain controller. Among them, the process of calibrating the microprocessor includes: constructing a network time protocol server request list, and simultaneously sending requests to all network time protocol servers in the network time protocol server request list; arbitrarily selecting multiple times from the returned times for comparison, and obtaining the most accurate one as the reference time; updating the local time of the microprocessor according to the reference time to complete the network time protocol calibration of the microprocessor. The present application improves the accuracy and reliability of the time set locally in the vehicle control system by comparing the NTP server response times, greatly reduces the possibility of abnormalities in vehicle functions caused by time, and thereby improves the user's vehicle use experience.