A method and system for restoring network synchronization signal after an alarm occurs

Abstract

The invention discloses a method and a system for recovering a network synchronous signal after an alarm occurs, and the application field of optical communication. This method is used in the scenario where service disks are cascaded, and the service disk transmits network synchronization signals, and the service disk has a signal transmission device that needs to be reset after an alarm; the method includes the following steps: When the clock source of the disk is fixed, reset the signal transmission device; after the signal transmission device is reset, and within the time recovery period before the signal transmission device can transmit a stable network synchronization signal, cut off the output signal of the signal transmission device; when the signal transmission When the device can transmit a stable network synchronization signal, the control signal transmits the device output signal. The invention can significantly reduce the bit error rate of the network synchronous signal, and further greatly improve the performance of the network synchronous signal recovered after an alarm occurs.

Description

technical field [0001] The invention relates to the field of optical communication applications, in particular to a method and system for restoring network synchronization signals after an alarm occurs. Background technique [0002] In recent years, with the emergence and rapid development of cloud concepts, streaming media, Internet of Things, 4G-LTE (long-term evolution of fourth-generation mobile communication technology) and other technologies, data traffic has continued to rise, and the requirements for network bandwidth and flexibility have been further improved. , in the case of 100G large-scale commercial use, the networking environment of major operators is becoming more and more complex. In order to realize service scheduling and ultra-long-distance transmission, multi-level cascading networking scenarios of service disks have begun to be widely used. [0003] In a networking scenario where service disks are cascaded at multiple levels and transmit network synchron...

AI Technical Summary

Problems solved by technology

It can be concluded that the more cascaded service disks (for example, lower-level service disks, etc.), the more the clock source switching times of the lower-level service disks (switching back and forth between the local clock and the line clock), and the number of clock source switching times The increase will make the signal transmission device unable to start signal processing at the right time

[0006] Furthermore, since switching the clock source will cause the signal transmission device to alarm and reset, frequent switching of the clock source will lead to an increase in the number of resets of the signal transmission device, which will significantly increase the frequency of the signal transmission device during the period from reset to not fully adjusted. Output abnormal data (i.e. "garbage" data); this will cause the bit error rate of the signal to seriously exceed the standard (if there are many cascaded business disks, it may even make the business impossible to conduct)

[0007] It can be seen that when the upper-level service disk generates an alarm and recovers, it will seriously affect the performance of the network synchronization signal output by the lower-level service disk, and the performance of the network synchronization signal output by the lower-level service disk is worse.

Images