Methods for wireless communication and a network device are provided. The method includes the following. A first network device determines at least one target terminal device as a GM clock node for multiple TSN clock domains.

Systems and methods for device time synchronization by networking devices are disclosed. For example, a networking device may be configured to perform one or more operations to synchronize time as between the networking device and one or more computing devices in an environment. The networking device may be selected from multiple networking devices to be the time master based on one or more factors and/or operations, such as the number of devices in communication with the networking devices, the device types of those devices, device-communication amounts, communication abilities of the devices, and/or which networking device has a wired connection to a modem, for example.

There is provided a method of clock recovery and a system thereof. The method comprises: by master clock node or by client clock node, generating a first flow of time-stamped packets bearing indication of high priority of delivery and, in parallel, generating a second flow of time-stamped packets bearing indication of lower priority of delivery. By client clock node, processing the packets from the first flow separately from the packets from the second flow to define, separately for each flow, a function informative of changes of packets' delays in the respective flow over time; using the defined functions informative of changes of packets' delays in the first and the second flows over the same time intervals to assess a cause of the packets' delays changes; and applying a clock recovery algorithm in a manner differentiated in accordance with the assessed cause.

The present disclosure relates to a clock distribution method and apparatus in a network. The method performed at a first clock distribution apparatus comprises: determining (S101) whether the first clock distribution apparatus is in a lock state; and transmitting (S102), to a second clock distribution apparatus, a first announce message when the clock distribution apparatus is not in the lock state; wherein the first announce message is generated based on a default configuration about a local clock state of the first clock distribution apparatus. According to embodiments of the present disclosure, the clock distribution apparatus may generate first announce messages based on a local clock state of the clock distribution apparatus. Thus, a downstream apparatus which receives the first announce messages may avoid selecting an unstable/unlocked clock distribution apparatus as the best master, based on the local clock state of the clock distribution apparatus.

Disclosed are a structure and a clock synchronization method of a precision network interface card for acquiring heterogeneous PTP synchronization information for PTP synchronization network extension. In order to precisely time-synchronize a synchronous switch at a remote location with a synchronous switch of an internal network, a precision time protocol (PTP) synchronous network system and a PTP synchronization method according to an embodiment allow a plurality of switches therebetween to operate as virtual nodes and can precisely measure Ingress_Time of a time synchronization message using a clock synchronized with the virtual nodes.

Systems and methods for providing timing information from a R-MACHPHY device to a video core while the R-MACPHY device receives video data from the video core while operating in asynchronous mode. In some embodiments, the R-MACPHY device may alternately and selectively configure its mode of operation to alternate between synchronous mode and asynchronous mode, and provide the timing information to the video core when it switches to asynchronous mode.

An internal time of a data server is compared against respective times of each of a plurality of devices of a network. The network may require tight time synchronization. The data server utilizes a plurality of high-performance oscillators to maintain the internal time. The data server analyzes the compared times to detect that a time maintained by another device of the network has drifted more than a threshold. An ameliorative action is executed in response to detecting that the time maintained by the another device has drifted more than the threshold.

A clock port attribute recovery method includes a network device setting a value of a port attribute of a clock port of the network device to a first value based on the clock port not receiving any one of three types of clock messages: N synchronization messages, follow-up messages, and delay response messages within a timeout interval, where the first value indicates that a message is lost on the clock port. Based on a case that a recovery condition is met, the network device sets the value of the port attribute of the clock port to a second value, where the second value indicates that a status of the clock port is that the message is not lost.

The present disclosure relates to clock switching methods, devices, and storage medium. In one example method, a slave clock device may monitor a working status of a master clock device, and sends first indication information when discovering that the master clock device is in a faulty state, so that a communications device synchronizes with a system clock of the communications device based on time information of the slave clock device.

Methods, systems, and devices for wireless communications are described. In an example, a method includes a first node receiving a precision time protocol (PTP) message, identifying one or more timing domains to be supported by the first node based at least in part on the PTP message, and sending, to a second node of the wireless communication network, an indicator of the one or more timing domains to be supported by the first node. Another example at a node includes receiving, from additional nodes of the wireless communication network, indicators of one or more timing domains supported by the additional nodes, receiving a PTP message associated with a timing domain, and sending the PTP message to a subset of the additional nodes based at least in a part on the indicators of one or more timing domains supported by the additional nodes.