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Method and system for realizing clock transparent transmission during asynchronous mapping

An asynchronous mapping and clocking technology, applied in the field of optical communication, can solve the problem of high cost

Active Publication Date: 2016-04-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is not a real clock transparent transmission in essence, because this method does not have a real clock path. It uses the center frequency of an external LVCO device to achieve clock follow. It is an indirect follow rather than a direct follow, and this The cost of this implementation is higher

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  • Method and system for realizing clock transparent transmission during asynchronous mapping
  • Method and system for realizing clock transparent transmission during asynchronous mapping
  • Method and system for realizing clock transparent transmission during asynchronous mapping

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Embodiment Construction

[0050] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0051] When performing AMP mapping from STM16 to ODU1 and ODU1 to ODU2, it is found that the JC value can also realize clock transparent transmission in a manner similar to Cm(t), Cn(t) and CnD(t) in the GMP mapping process. In this way, the multi-service convergence board can realize clock transparent transmission without any external device, reducing costs. Among them, OTUk is the Optical Channel Transport Unit (OpticalchannelTransportUnit), k represents the rate level; ODUk is the Optical Channel Data Unit (OpticalchannelDataUnit), k represents the rate level; STMk is the ...

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Abstract

The invention discloses a method for realizing clock transparent transmission during asynchronous mapping. The method is applicable to an AMP demapping device, and comprises the steps of performing frequency division for a recovery clock of an OTU2 signal based on a rate relation between an ODU2 signal and the OTU2 signal to obtain the recovery clock of the ODU2 signal; determining the rate relation between an ODU1 and the ODU2 according to a JC value extracted from the ODU2 signal, and performing frequency division for the recovery clock of the ODU2 based on the rate relation to obtain a recovery clock of the ODU1; and determining a rate relation between an STMk signal and the ODU1 signal according to a JC value extracted from the ODU1 signal, and performing frequency division for the recovery clock of the ODU1 based on the rate relation to obtain a recovery clock of the STMk signal. The invention enables a reference clock frequency of recovered customer service data at a demapping end to directly follow a clock frequency of original customer service data. The invention further discloses a corresponding system.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a method and system for realizing clock transparent transmission in an asynchronous mapping process. Background technique [0002] Such as figure 1 As shown, today's transmission equipment not only needs to transmit the data of the service itself, but also needs to transmit the clock information representing the data rate of the service, so that the services of the entire network can maintain clock synchronization. Clock transparent transmission means that the reference clock frequency used by the optical sending port (port that sends services to customers) on the downstream transmission device (demapping end) to send service data can follow the optical receiving port (receiving port) of the upstream transmission device (mapping end). port of the client service) the clock frequency of the service. [0003] In order to realize clock transparent transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04B10/25
CPCH04J3/06
Inventor 肖哲靖
Owner ZTE CORP