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Method for implementing lossless addition and deletion in virtual cascading recovery process

A technology of recovery process and virtual concatenation, which is applied in the field of digital transmission and can solve the problems of data failure, data loss, and large processing delay.

Inactive Publication Date: 2010-04-28
晋江市高新技术开发办公室
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is the shortcoming of data loss or long-term data failure or excessive processing delay caused by adding a delayed member in the prior art. Lossless method of adding and removing

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  • Method for implementing lossless addition and deletion in virtual cascading recovery process
  • Method for implementing lossless addition and deletion in virtual cascading recovery process
  • Method for implementing lossless addition and deletion in virtual cascading recovery process

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Embodiment Construction

[0034] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] figure 1 It is a functional block diagram of virtual concatenation recovery in the present invention. Such as figure 1 As shown, the storage device is internal or external RAM for caching data. The data written into the RAM is the data to be restored, and the data read from the RAM is the restored data.

[0036] The write direction generation module mainly generates the write address of the RAM, and the read direction generation module generates the read address of the RAM. These two addresses are also sent to the read and write address comparison module for comparison, and the comparison results are sent to the read direction generation module. Adjust the speed of read address increase to achieve the same rate of read and write addresses.

[0037] figure 2 Is the functional block diagram of the read and write direction control flow...

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Abstract

The method detects maximal time delay among members in same type in system automatically. Based on detected result, the method adjusts distance between read / write addresses of RAM automatically. Variational boundary position configured along writing direction is detected; and not readable section is setup along reading out direction. Through setting up the said distance and the not readable section, the method garurantees not losing data when adding member with time delay or resuming member with time delay after temporary deletion as well as controls time delay caused by module process in minimum zone.

Description

technical field [0001] The invention relates to the field of digital transmission, in particular to a method for recovering virtual concatenation in an SDH (Synchronous digital hierarchy, ie synchronous digital hierarchy) system. Background technique [0002] In an SDH system, in order to flexibly set up a network and improve bandwidth utilization efficiency, data is often transmitted in a virtual concatenation mode. The principle of virtual concatenation technology is to allow any number of small containers to be cascaded and assembled into a relatively large container to transmit data services. This technology can cascade containers of different rates such as VC-11, VC-12, VC-3, VC-4, etc., allowing very fine-grained bandwidth adjustment and providing more accurate bandwidth than adjacent cascading. In addition, since the services of virtual concatenation are regarded as multiple independent containers (that is, non-cascading containers) in the network, they can be transm...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06H04J3/24
Inventor 周炼孙晓雷杨振力刘毅张亚涛
Owner 晋江市高新技术开发办公室
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