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A clock recovery method and device

A clock recovery and clock count technology, applied in the field of network communication, can solve the problems of increasing system complexity and cost, unable to effectively reduce client layer clock jitter, and unsatisfactory client layer clock signal jitter performance, and achieve the effect of improving accuracy.

Active Publication Date: 2016-09-28
SANECHIPS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method increases the complexity and cost of the system, and the clock recovery is affected by the jitter of the data stream itself in one frame or multi-frame and cannot effectively reduce the clock jitter of the client layer. The jitter performance of the clock signal of the client layer cannot satisfy people. requirements

Method used

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  • A clock recovery method and device

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Embodiment Construction

[0046] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0047] figure 1 Shown is the clock recovery method of the present invention, including:

[0048] Step 101: Extract clock information corresponding to the service layer data stream transmitted in the demapping data channel, and transmit the extracted clock information to the clock recovery channel;

[0049] Step 102: Process the clock information in the clock recovery channel to obtain a clock signal corresponding to the clock information;

[0050] Step 103: Recover the client layer clock signal according to the obtained clock signal.

[0051] The clock recovery method in this embodiment extracts the clock signal from the service layer data stream, and performs clock recovery processing in the clock recovery channel independent of the demapping data channel. The clock recovery is independent of the demapped data stream, so as to...

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Abstract

The invention provides a method and device for recovering a clock. The method for recovering the clock comprises the steps that the clock information corresponding to service layer dataflow transmitted in a demapping data channel is extracted, and the extracted clock information is transmitted to a clock recovery channel; the clock information is processed in the clock recovery channel to obtain a clock signal corresponding to the clock information; a client layer clock signal is recovered according to the obtained clock signal. According to the method and device for recovering the clock, the clock jitter produced in the demapping or demultiplexing process can be effectively filtered out, and the client layer clock signal with the high performance can be recovered.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a clock recovery method and device. Background technique [0002] In the optical transmission network, in order to effectively utilize the bandwidth of the transmission medium, that is, the optical fiber, the low-speed client layer signal is usually mapped to the high-speed service layer signal by multiplexing at the source end, and then transmitted to the sink end through the optical fiber; When demultiplexing at the sink end, a special circuit is required to recover the clock of the client layer signal. For example, the PDH (Pseudo-Synchronous Digital Hierarchy) signal is mapped into the SDH (Synchronous Digital Hierarchy) signal, and the low-order ODUk (Optical Channel Data Unit) signal is multiplexed into the high-order ODUk. [0003] Existing mapping methods mainly include: synchronous mapping and asynchronous mapping. Since there are many synchronous...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
Inventor 巫上清王通李应飞
Owner SANECHIPS TECH CO LTD