Method and device for cross protection

A technology of cross protection and cross unit, applied in the field of communication transmission network, can solve problems such as waste of resources, complicated mapping process, inconvenient use, etc., and achieve the effects of improving efficiency, flexible and convenient use, and saving resources

Active Publication Date: 2009-12-30
ZTE CORP
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Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a cross protection method and device to solve the problems of complex mapping process, waste of resources and inconvenient use of existing ODUk (k=1, 2, 3) level cross scheduling

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  • Method and device for cross protection

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Embodiment Construction

[0044] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0045] In order to solve the problems of wasting resources and inconvenient protection in the current ODUk (k=1, 2, 3) level crossover mode, the present invention proposes to use an OTN-like frame format (OTUxG) for ODUk (k=0, 1, 2, 3) level Centralized cross-scheduling. The frame structure of the OTUxG is as follows figure 1As shown, the first 16 columns are still OTN overheads, and the ODU layer overheads in the first 14 columns of the original 2nd to 4th rows are not used and can be used as OTN custom overheads, and the others basically keep the original usage; the 17th to 3824th columns are net Load data, carrying ODUk (k=0, 1, 2, 3) particles used for cross-connection, this part is divided by the number of time slots T (T=2, 4, 8, 16), and each time slot of a single bus The slot needs to be able to carry one O...

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Abstract

The invention discloses a device for cross protection, comprising a business unit source end, a combined cross unit and a business unit sink end, wherein, the business unit source end is used for mapping an optical data unit (ODUk) signal to the same time slot in n paths of optical transport network (OTN) frame structure (OTUxG) data buses; m+n paths of OTUxG data are obtained by protection coding to be transmitted to the combined cross unit; the combined cross unit is used for cutting the time slot of the m+n paths of OTUxG data, and sends to the business unit sink end after multiple connection; the business unit sink end is used for protection coding of m+n paths of OTUxG data to recover n paths of OTUxG data and extract a corresponding ODUk signal from the same time slot of n paths of OTUxG data. The invention also discloses a method for cross protection. The invention realizes ODUk (k=0, 1, 2 and 3) level cross dispatching, improves processing efficiency, saves resource and is convenient and flexible for operation.

Description

technical field [0001] The present invention relates to the technical field of communication transmission network, in particular to a cross protection method and device. Background technique [0002] Optical Transport Hierarchy (OTH, Optical Transport Hierarchy) technology is a new generation of standardized digital transmission architecture after Synchronous Digital Hierarchy (SDH, Synchronous Digital Hierarchy) / Synchronous Optical Network (SONET, Synchronous Optical Network). The OTH-based Optical Transport Network (OTN, Optical Transport Network) meets the development requirements of data bandwidth. It is a transparent transmission technology developed to meet the large-capacity and coarse-grained scheduling requirements at the backbone network level. Its appearance makes the intelligent optical network gradually become a reality. [0003] The OTN network performs scheduling based on Optical Data Unit (ODUk, Optical Data Unit), and the cross-connect scheduling unit proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04J3/16H04L69/40
CPCH04L12/4633H04L12/413H04J3/1652H04J3/14H04L12/40013H04J2203/006H04L49/552H04L12/00H04B10/00
Inventor 马文凯苑岩
Owner ZTE CORP
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