34 results about "Network 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 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 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 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 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.

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 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.

In some implementations, a device may receive a synchronization signal. The device may synchronize with a wireless communication network based on the synchronization signal, wherein the device is associated with a radio frame based on the synchronization signal, and the radio frame is associated with a system frame number (SFN). The device may receive a time reference associated with a network time protocol (NTP). The device may obtain a timing based on the SFN and the NTP.

The application discloses a multi-time source fusion system and method of a distributed intelligent monitoring system, relates to the field of distributed intelligent monitoring, and realizes high reliability and high precision time synchronization in a complex dynamic network environment through intelligent integration of multiple time bases and complementary characteristics of each time source. In order to cope with the weak satellite signal environment, the precise time protocol and network time protocol time service scheme are introduced, and the network is used for time synchronization, so that the system can maintain the accuracy of time under various conditions. The application discloses a collaborative fusion high-precision time synchronization system integrating a global navigation satellite system, a precise time protocol, a network time protocol and a local high-stability crystal oscillator, and innovatively proposes weight dynamic distribution, health state adaptive adjustment and real-time frequency compensation algorithms, so as to realize automatic smooth switching of main and standby time sources, seamless self-healing of faults and continuous time keeping function under extreme conditions.

A method for a first device to set a reference time and an apparatus for the same are disclosed in a wireless communication system according to various embodiments. The method and apparatus for the same are disclosed, comprising the steps of: setting a first reference time based on Network Time Protocol (NTP); receiving a first message from a second device; adjusting the first reference time based on NTP to a second reference time based on GPS (Global Positioning System) time based on the fact that the first message contains information regarding GPS time; and transmitting a second message based on the second reference time.

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

The invention discloses a time synchronization method and device based on a precise network time protocol, and belongs to the field of computer networks. The time synchronization method comprises the following steps: determining a time synchronization control parameter; the parameters comprise a phase modulation time deviation stable value, a first target frequency deviation value and a second target frequency deviation value; acquiring a first time deviation between the first clock signal of the slave device and the second clock signal of the master device; entering a frequency modulation stage under the condition that the first time deviation is smaller than or equal to a phase modulation time deviation stable value, and adjusting the frequency of the first clock signal based on a first target frequency deviation value for the first frequency modulation; and after the first frequency modulation, adjusting the frequency of the first clock signal according to the target control method based on the second target frequency offset value. According to the time synchronization method and device based on the precise network time protocol disclosed by the invention, the convergence time of time synchronization can be shortened by entering the frequency modulation stage under the condition that the time deviation is smaller than or equal to the target threshold value.

The invention discloses a time synchronization method, a network time protocol server, a computer readable storage medium and a computer program product. The time synchronization method comprises the steps that a central processing unit can respond to a time synchronization request of a client side and send an instruction to a programmable device, the programmable device can respond to the instruction and receive a network time protocol message sent by the client side, the network time protocol message is processed through the programmable device, a processed message is obtained, and the processed message is sent to the client side. And sending the processed message to the client through the programmable device. Therefore, processing of the network time protocol message can be achieved through the programmable device independent of the central processing unit, the central processing unit can only be responsible for sending instructions with low resource consumption, the situation that the resources of the central processing unit are exhausted can be avoided, and therefore the processing efficiency of the network time protocol message is improved. Compared with a traditional scheme of realizing network time protocol message processing through a central processing unit, the time synchronization precision can be improved to a certain extent.

A technique of transporting a time protocol message for time-sensitive networking, TSN, from a first station (910) to a second station (920) through a wireless network (900) including at least one radio device wirelessly connected to at least one base station (400) of the wireless network (900) is provided. As to a method aspect, a method performed by at least one or each of the at least one radio device comprises a step of transmitting to the wireless network (900) a radio device request message requesting establishment of a packet data unit, PDU, session between the radio device and the wireless network (900), the radio device request message being indicative of a time protocol of the time protocol message. The method further comprises at least one of the steps of receiving from and transmitting to the at least one base station (400) of the wireless network (900) the time protocol message according to a Quality of Service, QoS, flow for transporting the time protocol message in the wireless network (900). The QoS flow is unambiguously or uniquely associated with at least one of the PDU session and the time protocol.

The embodiment of the invention discloses an information processing method, system and device, a medium and a product. The method comprises the following steps: a terminal receives global navigation satellite system time; and the terminal verifies whether the time of the global navigation satellite system is abnormal based on the time of the terminal compiling software or the network time protocol time. The method is beneficial to terminal time calibration under the condition that global navigation satellite system time calibration is normal, and the accuracy of terminal time can be improved.

The embodiment of the invention relates to a key establishment method and device, equipment and a medium. According to an embodiment of the present disclosure, at a key establishment proxy for network time security (NTS), key information for communication between a network time protocol (NTP) client and at least one NTP server is acquired from a key establishment server for NTS; and sending the key information to the NTP client. In this manner, the large amounts of computing resources and further public key infrastructure (PKI) functionality that would otherwise be required to process key acquisition by the NTP client are transferred to the key establishment agent. Therefore, efficient deployment of the NTS can be realized.

The invention discloses a multi-language synchronous broadcasting system and method based on Auracast. The method comprises the steps that a pickup processing module is configured to output a voice signal to be translated; the energy detection module is configured to trigger a translation request when the voice segment starts; the cloud translation module is configured to generate a target language voice stream in response to the translation request; the broadcast transmitting module is configured to distribute an independent BIS channel for a target language voice stream and an original voice stream through a wireless broadcast signal based on an Auracast protocol, and add a network time-based protocol for each voice data packet in each voice stream; and the audience terminal module is configured to respond to a selection request of a user for a target language and output audio according to the voice data packet in the target BIS channel corresponding to the target language. Therefore, synchronous, real-time and on-demand broadcasting of multi-language content is realized through real-time pickup, segmented uploading, cloud streaming translation, synchronous broadcasting and on-demand selection playing of a user.

The invention belongs to the field of user side resource aggregation regulation and control networks, and discloses an asymmetric channel-oriented network time protocol optimization method and a related device. And respectively screening out the minimum value of the time difference between the arrival time and the transmission time on each path of the request data packet and the response data packet. A correction value calculated based on the two minimum difference values is used for adjusting a local clock, and system errors caused by asymmetry of a round-trip path can be effectively counteracted. By adopting the method, the time service error caused by asymmetry and instantaneous fluctuation of a network path is remarkably reduced, and the defects of precision and stability of the traditional NTP single communication or a simple mean value algorithm in the scene are effectively overcome; meanwhile, the core bidirectional screening minimum value method has better adaptability to the local area network and the wide area network environment, and the precision and robustness of time synchronization can be stably improved without depending on a specific network topology or a complex preferential algorithm.

The invention provides a multi-modal data time synchronization and annotation and edge reasoning method and system, and relates to the technical field of cognitive evaluation. The multi-modal data time synchronization and annotation and edge reasoning method comprises the following steps: carrying out multi-modal data acquisition; a global logic clock + network time protocol + sliding window drift correction method is adopted to align the time of the multi-modal data; identifying three dimensions of a task stage, a behavior event and an emotional state, and outputting three types of annotation tags; deploying an edge inference model, and automatically triggering cloud rechecking when the confidence coefficient is lower than a threshold value; a unique timestamp and a task identifier are generated for each collection frame, and a unified log database is established at the cloud. According to the method, a time sequence correction algorithm and AI model annotation logic are deeply combined, millisecond-level time alignment and intelligent annotation of multi-modal data are achieved, and the technical problems of data asynchronization, high delay and large manual annotation amount in cognitive evaluation and rehabilitation training scenes are solved.

The invention discloses an IDC equipment state monitoring method and system, and relates to the technical field of data center operation and maintenance, and the method comprises the steps: receiving an event recording packet which comprises a task state event and timestamp quality evaluation information, the timestamp quality evaluation information comprises a central processing unit load condition, a network time protocol synchronization offset, hardware clock drift and a network interface queue state; calculating a first occurrence time prediction range of the task state event according to the timestamp quality evaluation information; constructing a task decision causal relationship network diagram according to the first occurrence time prediction range; and according to the task decision causal relationship network diagram, performing automatic decision making of the operation and maintenance system. According to the method, the task decision causal relationship network diagram can be constructed in combination with the timestamp quality evaluation information, so that equipment state monitoring is realized, and the accuracy and the reliability are improved.