Clock synchronization method and device
A clock synchronization and clock signal technology, which is applied in the field of communication, can solve problems such as improving the clock error of the communication network, decreasing the quality level of the clock signal, and reducing the reliability of network equipment, so as to avoid the accumulation of deviations, reduce clock deviations, and improve reliability. Effect
Pending Publication Date: 2021-09-28
NEW H3C SECURITY TECH CO LTD
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Problems solved by technology
However, in the event of a system clock failure, the quality level of the clock signal it sends to the network device at the head location degrades
At this time, the quality level of the clock signal returned by the network device at the end position to the network device at the first position will be relatively high, resulting in the problem that the network device at the first position performs synchronization according to the clock signal returned by the network device at the end position, thus Causes the transmission of the clock signal to form a loop
In this case, if the communication network forms a steady state, a clock signal will be continuously transmitted and synchronized in the communication network, and the clock deviation will be gradually accumulated, thereby increasing the clock error of the communication network and reducing the reliability of network equipment. sex
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[0040] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. Embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this specification.
[0041] This application provides a clock synchronization method, such as figure 1 shown, including:
[0042] S100. Acquire at least two clock signals respectively, and determine hop counts of the at least two clock signals.
[0043] like figure 2 As shown, multiple network devices can be set in the communication network, and several of the multiple network devices can form a ring structure. Here, four network devices are set in the communication network as an example for description, which are respectively Device 1, device 2, device 3, ...
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The invention provides a clock synchronization method and device, and relates to the technical field of communication. The clock synchronization method comprises the following steps: respectively acquiring at least two clock signals, and determining hops of the at least two clock signals; if it is determined that the hop count of any one of the at least two clock signals is greater than a preset hop count, selecting the clock signal with the minimum hop count from the at least two clock signals as a target clock signal according to the hop count; performing clock correction according to the target clock signal; and recording the hop count of the target clock signal, accumulating the hop counts carried in the target clock signal, and sending the updated target clock signal to the connected network equipment in the communication network. Through the method, the reliability of the clock in the communication network can be improved.
Description
technical field [0001] This description relates to the field of communication technologies, and in particular to a clock synchronization method and device. Background technique [0002] In a communication network, the normal operation of many services requires network time synchronization. Through time synchronization, the frequency and phase difference between network devices in the entire network can be kept within a reasonable error range. Among them, time synchronization includes synchronization of frequency and phase. Phase synchronization can be realized through PTP (Precision Time Protocol, Precision Time Protocol) protocol, and frequency synchronization can be realized through SyncE (Synchronous Ethernet, Synchronous Ethernet). In other words, through the PTP protocol and SyncE respectively, the time of the network equipment can be made accurate to the nanosecond level, and various services carried on the network equipment can be improved to obtain more accurate tim...
Claims
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Login to View More IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 徐金鹏
Owner NEW H3C SECURITY TECH CO LTD