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Method of receiving-end data rearrangement in LCAS

A data rearrangement and data receiving technology, which is applied to electrical components, transmission systems, etc., can solve the problem of immature data rearrangement technology at the receiving end, and achieve the effect of reducing the burden on the CPU and saving system resources

Inactive Publication Date: 2009-04-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the data rearrangement technology at the receiving end is not yet mature.

Method used

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  • Method of receiving-end data rearrangement in LCAS

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Embodiment Construction

[0014] Such as figure 1 As shown, the present invention first extracts the SQ corresponding to the VC channel from the data of the VC channel, then uses SQ as an address, writes the channel number of the VC channel as data in the VC channel RAM, and simultaneously generates the corresponding SQ of the data RAM according to the VC channel number. Write address, write the data of VC channel into data RAM according to this address. When it is necessary to read the VC channel data from the data RAM to complete the service regeneration, the VC channel number is sequentially read from the VC channel RAM starting from the "0" address. Here, starting from the "0" address means that the SQ is "0". Start; generate the address of the data RAM according to the read VC channel number, and then the data can be read from the data RAM. Since the VC channel has been rearranged according to the SQ, the data read out at this time has been rearranged according to the SQ number. Here, the capaci...

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Abstract

A data rearrangement method of receiving terminal in LCAS, which contains receiving terminal extracting VC channel corresponding SQ in receiving data and using VC channel number as data writing VC RAM, generating storage address for data according to VC channel number, when receiving terminal needing regeneration business, reading out VC channel number from RAM and generating said VC channel data storage address, then reading data from said address, said invention finds out the maximum SQ_MAX in VCG through EOS control word to determine the effective data range in RAM of VC whose content dose not need clearing each time, only by covering original data, so reducing CPU load.

Description

Technical field: [0001] The invention relates to a method for rearranging data of a virtual capacity group in LCAS, in particular to a method for rearranging data at a receiving end in LCAS. Background technique: [0002] When a Synchronous Digital Hierarchy (SDH, Synchronous Digital Hierarchy) system carries services, in order to carry services requiring large bandwidth, multiple VCs (Virtual Capacity, virtual containers) are usually bundled together for use. The multi-VC bundling realized by the virtual concatenation technology only has requirements for equipment at the upper and lower sites of the virtual concatenation service, and has no special requirements for the rest of the sites, so it has been greatly developed. The LCAS (LinkCapacity Adjustment Scheme) protocol is an enhancement of virtual concatenation. In SDH transmission services, the main function of LCAS is to use the reserved bytes of SDH overhead to define the control frame structure and control the carried...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/12
Inventor 李立华
Owner HUAWEI TECH CO LTD