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Mapping method of LCAS dynamic lossless switchover data bandwidth

A mapping method and data technology, applied in electrical components, transmission systems, etc., can solve the problems of VC data location disorder, data loss, affecting data transmission quality, etc., to ensure orderliness and improve data bandwidth.

Inactive Publication Date: 2005-01-05
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0011] Although LCAS technology improves the bandwidth utilization rate of the transmission system when carrying multiple data services, it fills in a single byte when filling in bytes for the VCG, that is, its single mapping byte is a single byte, and when the bandwidth changes , it is easy to cause the position of the interleaved VC data in the SDH frame to be disordered, thereby affecting the quality of data transmission and causing some data loss

Method used

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  • Mapping method of LCAS dynamic lossless switchover data bandwidth
  • Mapping method of LCAS dynamic lossless switchover 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 mapping is as follows:

[0028] If the number n of effective members of the virtual capacity group is less than 4, performing 4 filling operations on the virtual capacity group as a mapping 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 filling operations on the virtual capacity group as a mapping 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 valid members is adjusted only when all valid members in the virtual capacity group are filled with bytes.

[0030] The single mapping of the present invention can fill in multiple bytes at the same time, the minimum is 0 bytes, and the maximum is 4 ...

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Abstract

This invention discloses a method for imaging LCAS dynamic harmless switch data band width, which virtual container group contains 16 members, each of them is composed of 16 virtual serial containers and sets up master and standby image list data in the following ways: if the effective members n is less than 4, then 4 times filling operation is done to it as one image period, if n is greater than or equal to 4 and less than or equal to 16, then 16 times of filling as one image period and the first n times are the actual operation but the latter 16-n as the do-nothing operation.

Description

Technical field: [0001] The invention relates to a mapping 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) is to use SDH overhead bytes to customize the control frame structure and control the VC ( 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 group) can be adjusted. This adjustment will not affect the user normal business interruption. In addition, LCAS technol...

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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