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Demapping method of LCAS dynamic swtchover data bandwidth

A de-mapping and data technology, applied in the field of de-mapping, can solve the problems of VC static load data disorder, affecting data transmission quality, data loss, etc., so as to achieve the effect of ensuring data is not disordered, ensuring orderliness, and improving data bandwidth

Inactive Publication Date: 2005-01-05
HUAWEI TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0011] Although the LCAS technology improves the bandwidth utilization of the transmission system when carrying multiple data services, it fills in a single byte when outputting bytes to the VCG (demapping process), that is, its single demapping byte is a single byte , when the bandwidth changes, it is easy to cause confusion of the VC static load data deinterleaved from the SDH frame, thereby affecting the quality of data transmission and causing some data loss

Method used

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  • Demapping method of LCAS dynamic swtchover data bandwidth
  • Demapping method of LCAS dynamic swtchover data bandwidth

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Embodiment Construction

[0027] The virtual capacity group (VCG) of the present invention includes 16 members (Member), and each member is formed by serial connection of 16 virtual containers (VC), and the mode to data unmapping is as follows:

[0028] If the number n of effective members of the virtual capacity group is less than 4, performing 4 output operations on the virtual capacity group as a demapping cycle;

[0029] If the number n of effective members of the virtual capacity group is greater than or equal to 4 and less than or equal to 16, then perform 16 output operations on the virtual capacity group as a demapping cycle, wherein the first n times are real operations, and the last 16-n times is a no-op. If the data bandwidth changes, the number of effective members is only adjusted when all bytes of all effective members in the virtual capacity group are output, that is, the adjustment is performed at the boundary of the multiframe.

[0030] The single demapping of the present invention ca...

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Abstract

This invention discloses a de-image method for LCAS dynamic harmless switch data bandwidth, the virtual container set of which contains 16 members, each is composed of 16 serial-connected virtual containers and sets up master and standby de-image lists de-imaging data interms of the following ways: if the effective number n is less than 4, then 4 times of output operation to it is done as one de-image period, if n is greater than or equal to 4 and less than or equal to 16, then 16 times output operation to it as one de-image period, among which the first n tims for actual operation and the latter 16-n for do-nothing operation.

Description

Technical field: [0001] The invention relates to a demapping method for LCAS dynamic lossless switching data bandwidth. Background technique: [0002] In the SDH transmission service, the main function of LCAS (Link Capacity Adjustment Scheme, link capacity adjustment scheme) is to use SDH overhead bytes to customize the control frame structure, and to control the VC required for bandwidth demapping of the carried data service in an in-band manner. (Virtual Capacity, the number of virtual containers), and supports dynamic and lossless bandwidth (that is, the number of virtual containers) switching. Here, the LCAS technology is briefly introduced. LCAS is also called VBA (Variable Bandwidth Allocation, variable bandwidth allocation) technology at first. It can be seen that the LCAS technology has the characteristics of flexible bandwidth and dynamic adjustment. When the user bandwidth changes, the number of Members in the VCG (Virtual Concatenation Group, virtual capacity g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
Inventor 樊彧牟景辉邓晓林戴未
Owner HUAWEI TECH CO LTD
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