67 results about "Timing Synchronization Function" patented technology

The invention discloses a lightweight spliced bridge vibration monitoring system for cooperative work performance intelligent perception, and belongs to the technical field of bridge structure health monitoring, and the lightweight spliced bridge vibration monitoring system comprises a lightweight targeted sensing subsystem which comprises a plurality of perception assemblies arranged in a targeted manner; the intelligent edge acquisition and transmission subsystem has an independent addressing function and a time synchronization function and is used for preprocessing and lightweight processing; the cloud edge collaborative storage management subsystem performs hierarchical storage, security control and efficient retrieval on the data to form monitoring data; and the cooperative performance perception early warning subsystem realizes state evaluation and graded early warning of the cooperative work performance of the spliced bridge through multi-index fusion. By adopting the lightweight spliced bridge vibration monitoring system for cooperative work performance intelligent perception, the problems of insufficient lightweight and targeting performance, low data processing, transmission and storage efficiency, and inaccurate cooperative performance evaluation, damage positioning and early warning of traditional spliced bridge vibration monitoring are solved.

This disclosure provides methods, components, devices, and systems for integrated millimeter wave (IMMW) beam training for multi-link operation. Some aspects more specifically relate to beam sweeping and reporting for partnered 60 Gigahertz (GHz) and sub-7 GHz links. In some implementations, an access point (AP) multi-link device (MLD) may communicate with a non-AP MLD via a first omni-directional link, such as a sub7 link, and a second directional link, such as a 60 GHz link. The AP MLD may use the omni-directional link to configure one or more parameters and report feedback for the directional link. For example, the AP MLD may transmit, to the non-AP MLD via the first link, an indication of a timing synchronization function (TSF) value associated with the second link of the AP MLD. The AP MLD and the non-AP MLD may use the TSF value to support beam training operations for the second link.

An extended reality and media (XRM) service processing method, performed by a time-sensitive communication and time synchronization function (TSCTSF), includes: receiving a session creation request from an application function (AF), where the session creation request includes a synchronization indication and an XRM group identifier; and sending the synchronization indication and the XRM group identifier to a policy control function (PCF).

A wireless communication method determines a start time of a specified period based on a minimum time interval. The start time is at least the minimum time interval after an end of transmission of an indication frame to be transmitted by a first wireless communication device. The specified period is a period during which the first wireless communication device will become unavailable, or will operate with modified settings for one or more operational parameters. The first wireless communication device transmits the indication frame to a second wireless communication device, where the indication frame carries information associated with the start time. A receiving device calculates a distance value based on the information and determines whether the start time falls within a valid interval or a past interval to avoid Timing Synchronization Function timestamp wrap-around issues.

The invention relates to a time synchronization system and method of a TSN train communication network. The system comprises a backbone network clock domain, a marshalling network clock domain and an intermediate clock domain formed by connecting backbone network nodes and marshalling network nodes, the two backbone network clock domains receive the same external clock source through each autonomous clock node to realize time synchronization, and provide a unified time reference for each marshalling network clock domain; under the condition that the time synchronization of the clock domain of the backbone network is abnormal or invalid, the backbone network node sends a synchronization abnormal signal to the marshalling network node of the intermediate clock domain where the backbone network node is located; the marshalling network clock domain is used for realizing time synchronization of equipment supporting the TSN in the marshalling network; under the condition that the synchronization abnormal signal is received, the marshalling network node of the middle clock domain does not enable the time synchronization function, so that the backbone network clock domain is isolated from the marshalling network clock domain where the marshalling network node is located. The problem that large-area synchronization abnormity of the whole vehicle may be caused once the time synchronization of the backbone network fails is solved.

A communication method and a communication apparatus are provided. According to the method, a time synchronization function network element may obtain an identifier of a serving access management network element of a terminal device, and may further determine whether a target access management network element set includes the serving access management network element of the terminal device. In this way, when determining that the target access management network element set includes the serving access management network element of the terminal device, the time synchronization function network element subscribes to, from the serving access management network element of the terminal device, whether a location of the terminal device is in a coverage area of a time synchronization service, to avoid initiating unnecessary subscription. The target access management network element set includes an access management network element that serves a TA in the coverage area of the time synchronization service.

The invention discloses a direct current B code time synchronization and self-timekeeping method based on a multi-core heterogeneous chip, and provides a scheme aiming at the problems that the prior art has defects in the aspects of hardware resource utilization, timestamp precision, self-timekeeping capability under abnormal working conditions and the like and is difficult to meet the requirement of a high-precision synchronous scene. A multi-core heterogeneous chip is adopted to replace a single-chip microcomputer or an FPGA to receive, decode and detect a DC B code, nanosecond pulse per second synchronization, nanosecond timestamp calculation and a self-timekeeping function when a DC B code signal is lost are realized based on PWM, and time synchronization among multiple cores is realized through an inter-core communication technology. And predicting a direct current B code period value by using the time sequence prediction model deployed in the non-real-time kernel. The method has the advantages that the technical vacancy of a multi-core heterogeneous chip in direct-current B code time synchronization and self-timekeeping is filled, the out-of-step risk of equipment is reduced, the defect that a traditional direct-current B code time synchronization function can only be accurate to a whole-second timestamp is overcome, and the self-timekeeping performance of the equipment without a standard clock source is remarkably improved.

The application discloses an unmanned aerial vehicle communication network intelligent cooperative switching system for suppressing multi-station interference, and belongs to the technical field of wireless communication networks.The technical problem to be solved by the application is how to actively avoid or reduce the same-frequency interference of unmanned aerial vehicles when communicating in the overlapping area of multiple ground stations, realize stable and efficient seamless switching, and improve the spectrum utilization and communication reliability of the whole network.The technical scheme adopted is as follows: the system comprises a synchronous ground station group, a network cooperative controller and an intelligent unmanned aerial vehicle terminal.The synchronous ground station group is the infrastructure of the communication network formed by multiple ground stations with time synchronization function, and each ground station has interference measurement and reporting functions.The network cooperative controller is used for acquiring global information including the position information of the intelligent unmanned aerial vehicle terminal and the network information of the subnetwork where the intelligent unmanned aerial vehicle terminal is located in real time, and constructing a network topology connection graph by using the global information, and dynamically constructing and maintaining a network interference relationship graph.

A method implemented by a policy control function (PCF) is provided. The method includes receiving a first request related to an Application Function (AF) session bound to a Protocol Data Unit (PDU) session from a Network Open Function (NEF) or a Time Sensitive Communication and Time Synchronization Function (TSCTSF). The method also includes, upon receiving the first request relating to the AF session bound to the PDU session, determining whether the PDU session is potentially used for time sensitive communication (TSC). The method further includes determining whether to accept or reject the first request based on determining whether the PDU session is potentially used for the TSC; and transmitting a first response indicating whether the first request is accepted to the NEF or the TSCTSF.

The invention provides a method and a system for testing a priority time checking function of a power distribution terminal. The method comprises the following steps: a clock server performs time service on a state quantity generator, establishes a communication link between a test master station and the power distribution terminal, enables a remote signaling initial state of the power distribution terminal to be tested to be a quantile state, and performs constant value parameter configuration on the power distribution terminal to be tested; and then opening quantity ports of the state quantity generator are sequentially controlled to be closed / opened / closed, so that first protocol time synchronization, satellite time synchronization and second protocol time synchronization are carried out on a remote signaling state closing position / separating position / closing position of the to-be-tested power distribution terminal, a corresponding time synchronization result is generated, and finally, a test result of a priority time synchronization function test is generated according to the time synchronization result. According to the method and the system, on the basis of the time checking and time keeping functions of the original power distribution terminal, comprehensive verification of the priority time checking function of the power distribution terminal is added, it is ensured that the power distribution terminal preferentially selects a time checking mode with higher precision, and improvement of automation and practicability of power distribution is facilitated.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a peripheral device may synchronize a local clock with an access point timing synchronization function clock (TSFAP) maintained by an access point (AP) connected to the peripheral device. The peripheral device may maintain an estimated play time timing synchronization function clock (TSFest) associated with output user data based at least in part on the local clock. The peripheral device may receive timing synchronization information from the AP, the timing synchronization information based at least in part on a comparison between a wireless communication device (WCD) play time timing synchronization function software clock (TSFsoft) and the TSFest. The peripheral device may output the user data based at least in part on the TSFest and the timing synchronization information. Numerous other aspects are described.

Aspects relate to changing at least one communication parameter. In some examples, the at least one communication parameter may include at least one of an association identifier (AID), a packet number (PN), a sequence number (SN), a traffic identifier (TID), a timing synchronization function (TSF) value, or a combination thereof. In some examples, a first apparatus provides an indication of a change associated with at least one of the AID, the PN, the SN, the TID, the TSF value, or a combination thereof to a second apparatus.

The application relates to ESS privacy discovery and epoch alignment for MLD. An apparatus used in a MLD is disclosed, wherein the apparatus includes processor circuitry configured to cause the MLD to generate and transmit a frame carrying an element containing epoch setting, which includes a field with a Time Synchronization Function (TSF) value to determine next epoch start time, wherein: a MLO Link Information element is not included in the frame, the field with the TSF value is determined based on the TSF value of an AP corresponding to a link that is used to transmit the frame; or the MLO link information element is included in the frame, the field with the TSF value is determined based on the TSF value of the AP corresponding to the link indicated in the MLO Link Information element.

The invention provides a method for performing clock synchronization between a transmitter and a receiver, which comprises the following steps of: respectively sampling a first receiver timestamp and a second receiver timestamp of the receiver at a first time and a second time, a first transmitter timestamp and a second transmitter timestamp of the transmitter are sampled at a third time and a fourth time, respectively, and a first time synchronization function receiver timestamp and a second time synchronization function receiver timestamp are sampled at the first time and the second time, respectively, by a wireless network time synchronization function (Wi-Fi TSF), at the third time and the fourth time, the wireless network time synchronization function samples a first time synchronization function transmitter timestamp and a second time synchronization function transmitter timestamp respectively, generates an initial timestamp, generates an initial time synchronization function timestamp, generates a target phase difference, and generates a second time synchronization function transmitter timestamp; and periodically performing coarse tuning on a receiver system clock to compensate for the target phase difference.

Technology is disclosed for an access point (AP). The access point may include a processing device. The processing device may identify, at the AP, a time length and a periodicity for an internal virtual transmission opportunity (TXOP) for a peer-to-peer (P2P) group. The processing device may synchronize, at the AP, timing synchronization function (TSF) counters for the P2P group. The processing device may generate, at the AP, an event based on the periodicity. The processing device may start, at the AP, the internal virtual TXOP for the P2P group.

The invention provides a beacon adjusting method applied to a wireless base station. The beacon adjustment method comprises the following steps: detecting at least one signal or at least one signal collision event; calculating an adjustment reference according to the at least one signal or the at least one signal collision event; and adjusting the target beacon transmission time according to the adjustment reference, or adjusting the timing value of the timing synchronization function according to the adjustment reference.

Certain aspects of the present disclosure provide techniques for wireless communication by a station, generally including obtaining a frame including a partial representation of a target time value, where the target time value is based on a portion of a current time synchronization function (TSF) value associated with when the frame is obtained; adjusting the portion of the current TSF value if a recovery value of the target time value represents past time; and restoring the target time value based on the partial representation of the target time value and the adjusted portion of the current TSF value.

The invention discloses a fault injection fault-tolerant test device based on a network time synchronization protocol. The fault injection fault-tolerant test device comprises a first data interface, a shunting module, a test configuration module, a fault injection module, a time synchronization module, a synchronization state monitoring module and a second data interface, the fault injection module performs fault injection on the synchronization frame according to the fault injection configuration information to obtain a fault injection synchronization frame; the time synchronization module realizes a network time synchronization protocol function according to the fault injection synchronization frame and outputs a response synchronization frame; the fault injection module performs fault injection on the received response synchronization frame to obtain a fault injection response synchronization frame; and the synchronization state monitoring module is used for monitoring the working state of the time synchronization module to obtain state monitoring information, so that the fault tolerance of the time synchronization function is evaluated according to the state monitoring information. According to the method and the device, the fault tolerance test of the equipment with the time synchronization function is realized through hardware logic, so that the fault tolerance test effect is more reliable.

This application provides a time synchronization method and an apparatus. The method includes: A time synchronization function network element may recalculate, based on time provision data generated when an anomaly occurs in a timing synchronization state of a node in a communication system, a new time provision error for an access network device to determine a time provision method; and the time synchronization function network element may compare the recalculated time provision error with the time provision data of the access network device, to assist the access network device in re-determining the time provision method.

A method performed by a Policy Control Function (PCF) is provided. The method includes receiving, from either a Network Publishing Function (NEF) or a Time-Sensitive Communications and Time Synchronization Function (TSCTSF), a first request associated with an Application Function (AF) session bound to a Protocol Data Unit (PDU) session. The method further includes, after receiving the first request associated with the AF session bound to the PDU session, determining whether the PDU session is likely for Time-Sensitive Communications (TSC). The method further includes determining whether to accept or reject the first request based on the determination of whether the PDU session is likely for TSC, and sending a first response toward the NEF or the TSCTSF indicating whether the first request is accepted.

The invention belongs to the technical field of iron core grounding current monitoring of transformers, and particularly relates to an iron core grounding current recording method based on precise time synchronization. Comprising the following steps: collecting a current signal through an iron core and a clamp grounding current sensor; time deviation caused by RTC is calibrated continuously in the collection process; performing cyclic sampling and calculation on an output signal of the sensor, sending total current and multiple harmonic waves obtained by Fourier calculation to a display end of an upper computer, and starting fault recording when the value of the total current meets a fault judgment threshold value; when it is judged that a fault occurs, an accurate time mark is provided through an accurate time synchronization function, reserved historical data and collected real-time data are spliced into a wave recording graph during the fault period, and the wave recording graph is backed up and transmitted to a display end of an upper computer to be stored and displayed. According to the invention, some fault phenomena which are short in duration and rapid in generation and disappearance can be effectively monitored, and the change trend of iron core and clamp current when faults occur can be effectively monitored.

The invention discloses a wireless precise clock beacon device based on an ultra-wideband technology, which can receive time information of PTP, GNSS, IRIG-B DCLS and FreeRun, realizes time synchronization of local equipment, has a function of outputting IRIG-B DCLS serial time code streams, and can simultaneously realize time synchronization of the IRIG-B DCLS serial time code streams through an ultra-wideband wireless link. And the time information is broadcasted to other wireless equipment nodes, so that a time synchronization function among the plurality of wireless equipment is realized.

This invention discloses a fault injection and fault tolerance testing device based on a network time synchronization protocol, comprising: a first data interface, a traffic splitting module, a test configuration module, a fault injection module, a time synchronization module, a synchronization status monitoring module, and a second data interface. The fault injection module injects faults into synchronization frames according to fault injection configuration information to obtain fault-injected synchronization frames. The time synchronization module implements the network time synchronization protocol function based on the fault-injected synchronization frames and outputs response synchronization frames. The fault injection module injects faults into the received response synchronization frames to obtain fault-injected response synchronization frames. The synchronization status monitoring module monitors the working status of the time synchronization module, obtains status monitoring information, and evaluates the fault tolerance of the time synchronization function based on the status monitoring information. This invention implements fault tolerance testing of devices with time synchronization functions through hardware logic, making the fault tolerance testing results more reliable.

A station (STA) multilink device (MLD) may include a first STA affiliated to the STA MLD and a second STA affiliated to the STA MLD. The first STA may be configured to receive a first management frame over a first link from a first access point (AP) affiliated to the AP MLD. The first management frame may include timestamp information. The first STA may be configured to receive a second management frame from the first AP over the first link. The second management frame may include a time synchronization function (TSF) offset. The second STA may be configured to receive at least one third management frame from a set of third management frames over a second link from a second AP affiliated to the AP MLD based on the timestamp information and the TSF offset. The at least one third management frame may be transmitted using a sector scan.

A timing synchronization function (TSF) synchronization method includes: generating a first TSF information frame, where the first TSF information frame includes first TSF synchronization data, and the first TSF synchronization data includes TSF information of a first access point (AP) of a multi-AP (MAP) system; and sending the first TSF synchronization frame to a second AP of the MAP system.

Architectures and techniques are described that can facilitate precision timing synchronization with a network interface card (NIC) that is compliant with a peripheral component interconnect express (PCIe) card electromechanical (CEM) specification. In that regard, certain pins that are specified to provide JTAG functionality can be repurposed. Thereafter the particular JTAG pins that are repurposed for precision timing synchronization functions can be utilized to provide precision timing synchronization functions, USB functions, or both. Because the timing synchronization flows through the pins of the NIC, other cabling (e.g., coaxial cables) implemented for the express purpose of timing synchronization can be eliminated.

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. A method performed by an NEF entity in a wireless communication system comprises the steps of: receiving a session update request message including at least one quality of service (QoS) parameter from an application function (AF) entity; determining whether a session has been established between the NEF entity and a time sensitive communication time synchronization function (TSCTSF) entity; and if a session has been established between the NEF entity and the TSCTSF entity, transmitting a QoS update request message including the at least QoS parameter to the TSCTSF entity.

Improving relay operation in wireless networks may be provided. Improving relay operation in wireless networks can include performing a relay Transmit Opportunity (TXOP) frame exchange with a Relay Station (rSTA), wherein the TXOP frame exchange comprises setting a Modulation and Coding Scheme (MCS) for a second hop frame the rSTA will transmit to a Destination STA (dSTA). A first hop frame can be transmitted to the rSTA for the rSTA to transmit to the dSTA via the second hop frame. Then, an end-to-end Acknowledge (ACK) signal can be received from the rSTA. Relay operation can be improved by implementing an end-to-end ACK, the tSTA determining the TXOP duration, enabling the rSTA to relay Timing Synchronization Function (TSF) timing information to the dSTA, and / or enabling the rSTA to receive a transmission from the tSTA and relay the transmission to the dSTA simultaneously.

The invention relates to a data transmission method and device, equipment, a storage medium and a program product. The method comprises the following steps: after a session management function (SMF) creates a first packet data unit (PDU) session for a TSN service flow between a device side time sensitive network (TSN) converter (DS-TT) and a network side TSN converter (NW-TT), if a time sensitive communication time synchronization function determines that the DS-TT and the NW-TT support a dual-transmission selective receiving function, sending a copy link establishment request message to the SMF, the copy link establishment request message is used for indicating the SMF to create a second PDU session for the TSN service flow between the DS-TT and the NW-TT. By adopting the method, the reliability of data transmission can be improved.

This disclosure provides methods, components, devices, and systems for integrated millimeter wave (IMMW) beam training for multi-link operation. Some aspects more specifically relate to beam sweeping and reporting for partnered 60 Gigahertz (GHz) and sub-7 GHz links. In some implementations, an access point (AP) multi-link device (MLD) may communicate with a non-AP MLD via a first omni-directional link, such as a sub7 link, and a second directional link, such as a 60 GHz link. The AP MLD may use the omni-directional link to configure one or more parameters and report feedback for the directional link. For example, the AP MLD may transmit, to the non-AP MLD via the first link, an indication of a timing synchronization function (TSF) value associated with the second link of the AP MLD. The AP MLD and the non-AP MLD may use the TSF value to support beam training operations for the second link.