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Method and device for high capacity crossing of optical channel data units

A data unit and optical channel technology, applied in the field of optical communication, can solve the problems of rising equipment cost and disadvantageous ODU large-capacity crossover, and achieve the effect of meeting the needs of smooth upgrade

Inactive Publication Date: 2012-09-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this technology is that the rate of ODU1 services is STM-17 (17-level synchronous transmission module). To realize OTN cross-connection through the cross-connection device of the optical synchronous digital transmission system, it is necessary to first map ODU1 to STM-17. Then demap STM-17 to STM-1 (level 1 synchronous transmission module) rate and enter the cross chip for cross
This will lead to an increase in equipment costs, and is not conducive to the realization of ODU large-capacity crossover

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  • Method and device for high capacity crossing of optical channel data units
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  • Method and device for high capacity crossing of optical channel data units

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Embodiment Construction

[0033] Embodiments of the present invention provide a method and device for large-capacity crossover of optical channel data units. First, ODU services are demapped from OTN services, and ODU services are mapped into VC4-XC in an asynchronous mapping manner, and then VC4 - The ODU service in XC is divided and mapped into multiple TFI-5 bus structures, which can expand the crossover capacity by 8 times, and then perform a first-level VC4 service division on the encapsulated TFI-5 bus service, according to the 2bit (bit) division mode. Expand the cross-connect capacity by 4 times, and finally use the cross-connect plane to support AU4 (Administrative Unit Pointer Management Unit)-level synchronous cross-connect chips to bundle cross-connects according to ODU-level particles. Since the system side adopts the same frame structure of STM-16 rate and SDH, ODU services can be realized Through the synchronous digital system cross-scheduling, SDH services can also be directly cross-sche...

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Abstract

The invention provides a method and a device for the high capacity crossing of optical channel data units, which belong to the technical field of optical communications. The method comprises the following steps: de-mapping optical channel data unit ODU services from an optical transport network, and asynchronously mapping the ODU services into a high-order virtual container cascading VC4-XC structure; performing partitioning and mapping on the ODU services in the VC4-XC and encapsulating the ODU services into a plurality of TFI-5 bus structures; and finally, performing bundling and crossing on bus signals obtained by the encapsulation according to AU4 granules. Thus, the method and the device can implement the cross connection of the ODUK services of ultra-high capacity, and can implementthe no-damage protection switching of the ODU services because the OUT services are mapped into a synchronous bus of a system.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a method and device for large-capacity crossover of optical channel data units (Optical channel Data Unit, ODU) in OTH (Optical Transport Hierarchy, optical transport system). Background technique [0002] The optical transmission system is a new generation of standardized digital transmission system after SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy). Scheduling requirements. ODU is divided into ODU1, ODU2 and ODU3 in ITU-T (International Telecommunication Union Telecommunication Standardization Group) G.709. An OTN (Optical Transport Network, Optical Transport Network) network is scheduled based on the ODUK (K=1, 2, 3) to implement a cross-connect function of the ODUK. [0003] The following briefly introduces how to implement the cross-connection function of the ODUK in the prior art. [0004] Existing technology 1: The cross-conne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00
CPCH04J3/167H04J2203/0094
Inventor 汪友宝邓春松
Owner ZTE CORP