89 results about "Timing Synchronization Function" patented technology

The invention discloses a time synchronization device and method based on Beidou satellite time service signal security isolation. The device comprises a Beidou signal receiving module, a dual-core processor, a high-precision clock module and a time slice coordination module. Wherein the dual-core processor comprises a security isolation core and a time synchronization core; an isolation bridge is arranged between the security isolation core and the time synchronization core; the Beidou signal receiving module is connected with the security isolation core through a special data interface; and the high-precision clock module is connected with the time synchronization core through a special clock bus. According to the physical isolation design of the heterogeneous dual-core processor, strict separation of time service signal processing and time synchronization functions on a hardware level is realized, and a potential attack path is effectively blocked, so that the security, integrity and anti-interference capability of time service information are guaranteed on a system architecture level, and the time service performance is improved. The method can be widely applied to the computer technical field.

An apparatus and method for directly exposing, by user plane function / network side-time sensitive networking translator (UPF / NW-TT), event result information to time sensitive networking (TSN) or time sensitive communication time synchronization function (TSCTSF) through service interface (Nupf) in wireless communication system. A method of operating event processing for TSN or TSC includes: when policy control function (PCF) performs TSC event subscription, receiving TSC management and control information for direct reporting notification of event result from TSN-application function or TSCTSF and transmitting the TSC management and control information to session management function (SMF); regenerating the TSC management and control information and transmitting the regenerated TSC management and control information to UPF / NW-TT through N4 interface; and receiving the TSC management and control information from SMF, and when a corresponding event occurs, transmitting the TSC management information including the event result to a target in the control information through SBI.

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.

Provided are a time synchronization method using 5G reference time distribution and a network entity performing the same. The time synchronization method may include receiving, by a time sensitive communication time synchronization function (TSCTSF), a 5G reference time distribution request including time synchronization parameter values from an application function (AF); performing, by the TSCTSF, policy modification; and transmitting, by the TSCTSF, a setting of the 5G reference time distribution to the AF.

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).

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

An electronic device according to an embodiment may include at least one wireless communication module configured to transmit and receive a wireless signal, at least one processor electrically and / or operatively connected to the wireless communication module, and a memory electrically and / or operatively connected to the processor and configured to store instructions executable by the processor. When the instructions are executed by the processor, the processor may perform a synchronization with an external electronic device based on time synchronization function (TSF) timer associated information of a reference access point (AP). The processor may further form a neighbor awareness networking (NAN) cluster including the electronic device and the external electronic device based on a result of performing the synchronization. The NAN cluster may be maintained in a non-master mode based on TSF timer information of the reference AP. Other embodiments may also be possible.

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.

An apparatus and method for directly exposing, by user plane function / network side-time sensitive networking translator (UPF / NW-TT), event result information to time sensitive networking (TSN) or time sensitive communication time synchronization function (TSCTSF) through service interface (Nupf) in wireless communication system. A method of operating event processing for TSN or TSC includes: when policy control function (PCF) performs TSC event subscription, receiving TSC management and control information for direct reporting notification of event result from TSN-application function or TSCTSF and transmitting the TSC management and control information to session management function (SMF); regenerating the TSC management and control information and transmitting the regenerated TSC management and control information to UPF / NW-TT through N4 interface; and receiving the TSC management and control information from SMF, and when a corresponding event occurs, transmitting the TSC management information including the event result to a target in the control information through SBI.

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 present disclosure provides a system and method for synchronizing wireless devices with each other. In some implementations, the device transmits an indication of an extended synchronization mode to at least one wireless station (STA) on a first communication link associated with a first access point (AP) of the device. The device transmits a plurality of synchronization frames during the extended synchronization mode on the first communication link more frequently than target beacon transmission times (TBTTs) associated with the first communication link, each of the plurality of synchronization frames indicating a timing synchronization function (TSF) offset between the first AP and a second AP of the device. In some instances, at least one of the plurality of synchronization frames can be a fast initial link setup (FILS) discovery frame carrying a TSF value of the first AP.

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.

The invention provides a low-interception anti-interference radio pulse collision confrontation method, device and equipment, a medium and a program product, and the method comprises the steps: S100, constructing a channel occupancy information matrix, and calculating a channel occupancy probability; s200, constructing a revenue function of the selection strategy based on the channel occupancy probability, and dynamically adjusting the optimal strategy based on the revenue function in the communication process; s300, in the communication process, a narrow wave beam pointing to a target node is formed by adjusting the antenna direction of a transmitting end, and meanwhile, the transmitting gain is dynamically adjusted according to the feedback of a receiving end; and S400, carrying out interference elimination at a receiving end by adopting a serial interference elimination technology. According to the invention, radio pulse collision can be effectively resisted in a complex electromagnetic environment, high-reliability communication and time synchronization functions of a radio system are realized, interference caused by pulse collision is reduced, and the stability and anti-interference capability of a communication link are improved.

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.

A method for time synchronization includes: receiving a message carrying time synchronization function information, the time synchronization function information being used for time synchronization of a station and an access point under multiple links; and controlling the time synchronization of the station and the access point under the multiple links by using the time synchronization function information.

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.

Provided is an operation method of a time sensitive communication and time synchronization function (TSCTSF) in a wireless communication system, the operation method including: obtaining a deterministic networking (DetNet) configuration parameter from a first AF outside a service provider network; generating parameter mapping information on the basis of the DetNet configuration parameter; and providing the parameter mapping information to a second AF inside the service provider network, wherein the TSCTSF is a network function for providing the AF outside or inside the service provider network with time sensitive communication and time synchronization services.

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.