There is disclosed a method and system for controlling network timing precision of a seismic collector, and a terminal device. The method includes: using an interrupt mode to transmit a data packet; calculating an optimal network delay; and correcting a transmission error in a network timing process according to the optimal network delay, after which the physical layer of a server receives the data packet and sends the data from the physical layer of the server to the application layer of the server using the interrupt mode thereby timing the data packet.

A time synchronization system includes a master station (100) and slave stations (200) communicably connected to the master station (100). The master station (100) includes a contention determiner (114) and a time synchronization frame processing unit (113). The contention determiner (114) determines, based on receipt timings of a plurality of first time synchronization frames transmitted from the respective slave stations (200), whether the plurality of first time synchronization frames have a possibility of contention over relay processing. The time synchronization frame processing unit (113) discards, when the contention determiner (114) determines that the plurality of first time synchronization frames have the possibility of the contention, out of first time synchronization frames that have a possibility of mutual contention, a first time synchronization frame received later.

A system can, in response to determining to capture bio telemetry data associated with client devices, synchronize respective second clock times of respective client devices with a first clock time maintained by a network time protocol server, wherein the respective client devices are configured to capture the bio telemetry data of respective users associated with the client devices, wherein the respective users are associated with respective user accounts. The system can synchronize the bio telemetry data of the respective users based the respective second clock times.

This disclosure provides a time synchronization packet processing method and apparatus. The method includes: A terminal device receives first indication information, where the first indication information indicates the terminal device to enter an activation state of time synchronization for a first clock source, or the first indication information indicates the terminal device to enter a deactivation state of time synchronization; and processes a time synchronization packet of the first clock source based on the first indication information.

An apparatus and method for supporting a precision time synchronization protocol of a stealth clock type are provided. The method may be performed by a stealth clock follower device and may include transmitting a sync message received from a neighbor device to an end-follower device, receiving a delay-request message from the end-follower device, and updating a residence time in a correction field of the received delay-request message. The method may also include transmitting the updated delay-request message to a leader device, receiving a delay-response message from the leader device, and performing time synchronization based on a time of the leader device by using an ingress time of the sync message, an egress time of the updated delay-request message, and time information contained in the sync message and the delay response-message. The method may further include transmitting the delay-response message to the end-follower device for time-synchronization.

A network element includes a port; and a device with circuitry configured to encode data for communication to a second device via a plurality of physical channels, and utilize one of the plurality of physical channels as a dedicated timing channel with encoding thereon different from encoding on the other plurality of physical channels, and interface encoded data via the plurality of physical channels with the port for transmission and reception with a second device.

There is provided a GNSS independent method for asymmetry delay error compensation to minimize a time difference bias when using two-way time transfer in a communication network. The method includes establishing a bidirectional virtual path comprising at least one link path, LP1-LP4, over the network for communication between a first node A and a second node B by sending a bidirectional data stream over the virtual path and utilizing previously stored link profiles associated with a delay correction factor or a calibrated virtual path or a stable local clock in holdover mode to provide new delay correction factor to minimize a time difference bias in the local time in the second node.

An interface conversion apparatus includes processing circuitry. The processing circuitry measures communication quality inside the mobile communication system. The processing circuitry refers to evaluation index information specifying, for each communication group, an allowable range of variation in the measurement result of the communication quality and a fluctuation adjustment time, and determines the communication group in which a variation in the measurement result of the communication quality obtained from history information including a measurement result falls within the allowable range for each piece of identification information included in the packet. The processing circuitry selects the communication group of the packet received from the identification information of the packet received, based on a correspondence relationship between the communication group determined and the identification information of the packet. The processing circuitry controls the packet received for each communication group, using the fluctuation adjustment time in the evaluation index information corresponding to the communication group determined.

A method for providing timing security in a time sensitive network (TSN), includes monitoring TSN times in timing synchronization packets exchanged between TSN network nodes. The method further includes monitoring TSN timing values calculated by TSN network nodes. The method further includes determining, using TSN times and TSN timing values, whether a timing attack is indicated. The method further includes, in response to determining that a timing attack is indicated, performing a timing attack effects mitigation action.

A method for securing time synchronization in a server ECU, including: initializing time synchronization of the components; storing a unique clock identification of a grandmaster clock; identifying a shadow controller; transmitting the synchronization messages; querying the sending time with the shadow controller; inserting the time in the follow-up message via the controller that forms the grandmaster clock, and retransmitting the time; sending additional messages relating to time synchronization via selected network devices that do not provide the previously determined grandmaster clock. The time information sent in the additional messages relating to time synchronization and also the clock parameters relevant for determining the best clock by means of BMCA and the domain number match those of the previously determined grandmaster clock, or are comparable with them. The additional messages relating to time synchronization contain a unique clock identification corresponding to the identification of the respective selected network device.