Large-capacity multicast strict blocking-free cross array structure

Abstract

The structure of matrix comprises input stage, second stage and output stage. The input stage includes 16 modules of cross-interaction matrixes in type of one divided into two. Receiving one route input signal in 80Gb / s, each module outputs two routes of signal in 80Gb / s. second stage consists of 4 matrix modules in 640Gb / s. receiving 8í‡80Gb / s output from the input stage, each cross-interaction matrix module outputs 8í‡80Gb / s signal. The output stage is composed of 16 matrixes in 160Gb / s in type of one selected from two. Receiving 2í‡80Gb / s signal output from the second stage, each cross-interaction matrix module outputs 80Gb / s signal. Outputted each VC - 4 time slot signal carries out selection from only two inputted VC - 4 time slot signals. The cross-interaction matrixes are applicable to optical cross-connected device, SDH device and digital cross-connected device, possessing advantages of few cross-connected chips, high economical efficiency and strict nonblocking.

Description

technical field [0001] The invention relates to the technical field of digital optical fiber communication, in particular to a large-capacity multicast strictly non-blocking cross matrix structure. Background technique [0002] With the advent of the information age represented by Internet technology, people's demand for communication bandwidth is increasing. The application of the Dense Wavelength Division Multiplexing (DWDM) system has solved the bandwidth problem of information transmission, but the problem of small crossover capacity of nodes has not been solved, which has become a bottleneck problem in the network. [0003] In digital fiber optic communication systems, there are a large number of cross-connect requirements. The cross-connect matrix is ​​the core of optical cross-connect equipment, synchronous digital series / synchronous optical network equipment, digital cross-connect equipment and even switch equipment. [0004] There are two main types of commonly us...

AI Technical Summary

Problems solved by technology

[0010] from figure 2 and Figure 5 In the 1.28Tb / s multicast strict non-blocking cross-connect matrix, it can be seen that since the third-level T1-T4 are all composed of four 160Gb / s cross-connect chips working together to select 320Gb / s signal output from 640Gb / s signals Its disadvantages are as follows: 1. As long as one chip fails, the entire 320Gb / s signal output will be unusable, resulting in reduced reliability; 2. Since the 1.28Tb / s equipment is very large, it is necessary to use three levels of After being crossed and separated, they are placed in multiple chassis, and the modules F1-F4 and T1-T4 are placed together with multiple business disks, and the volume of a single module is too large, making it difficult to manufacture the entire device; 3. Basic The service unit is 320Gb / s. In the early stage of equipment construction, if only smaller services below 160Gb / s or 80Gb / s are needed, resources will be wasted

4. Each VC-4 output by the third stage of the crossover is selected from a large number (4096) of VC-4s, and the crossover control is relatively complicated

Images