Method and device of realizing synchronous switchover of CLDS crosslink matrix

Abstract

The method includes following steps: after receiving request for changing cross connections, configuration controller calculates request so as to obtain new CLOS matrix; configuration controller issues new CLOS matrix to group of cross node; waiting for ready signal returned from all cross nodes in group of cross node; after ready for preparing switching, each cross node returns ready signal to configuration controller; after all ready signals are returned, configuration controller sends out synchronous switching signal to inform each cross node to carry out switching operation for the cross matrix; after receiving 'synchronous switching signal' from configuration controller, each synchronous node switches to new matrix instantly. Configuration controller is composed of communication circuit, control line and state line.

Description

field of invention [0001] The invention relates to a method and equipment for realizing synchronous switching of a cross-connect matrix, in particular to a method and equipment for realizing synchronous switching of a CLOS cross-connect matrix. Background technique [0002] In an SDH / SONET (Synchronous Digital Hierarchy / Synchronous Optical Network) network, a cross-connect matrix is ​​the core part of a synchronous digital cross-connect device (hereinafter referred to as a cross-connect device). Commonly used cross-connect matrix types are square matrix and CLOS matrix. [0003] The square matrix can achieve 100% non-blocking cross-connection. The disadvantage is that the scale of the matrix grows exponentially by the square, which can be tolerated when the cross-connect capacity is small. When the cross-connect capacity is large, if the square matrix design is still used, not only the design complexity will be greatly increased. , and the equipment cost is also considerabl...

AI Technical Summary

Problems solved by technology

[0011] 1. Because a specific location is used to insert a specific overhead to achieve synchronous switching, a set of synchronous switching protocol is required, and this protocol needs to be completed by pure hardware logic, which is relatively expensive;

[0012] 2. The applicability of the in-band message mechanism is very poor, and it cannot meet various application occasions; for example, the protocol applicable to the 3-level CLOS matrix is ​​not suitable for the 4-level CLOS matrix; that is to say, the in-band message mechanism needs to be specific to different levels of CLOS matrices Develop different in-band messaging protocols

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