Non-obstruction optical network apparatus as well as optical network node end-to-end service non-obstruction decussation method

Abstract

The invention discloses a block-free optical network device and a block-free crossing method for an end to end service of an optical network node. The method comprises the following steps: A. changing the wavelength of the input M directions N ports wavelength service by adopting a M channels N is multiplied by N ports wavelength assignment unit and obtaining an M directions N ports wavelength signal after the wavelength assignment; B. assigning the direction of the M directions N ports wavelength signal after the wavelength assignment by adopting a direction assignment unit and outputting the M directions N ports wavelength service after the direction assignment. The invention solves the flexible assignment and cross problem among the end to end service of the optical network node and wavelength and direction, thus realizing the assignment of any service to any length and any direction and improving the block-free crossing capacity of the optical network node.

Description

technical field [0001] The invention relates to a wavelength division multiplexing optical communication system and an automatic switching optical network of the optical communication technology, in particular to a non-blocking optical network device and an end-to-end service non-blocking crossover method of an optical network node. Background technique [0002] In recent years, with the development of multimedia, high-definition television (HDTV), and third-generation mobile communications, people have a huge demand for transmission bandwidth, and the wide adoption of dense wavelength division multiplexing DWDM technology provides abundant bandwidth resources for the network , but it also makes network switching nodes become the bottleneck of network development. [0003] At the same time, with the rapid development of ASON (Automatic Switch Optical Network) technology, the key technologies implemented by ASON system equipment have attracted the attention of major operators...

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Problems solved by technology

[0006] However, since the traditional OXC and ROADM implement pure optical cross-connection, the wavelength permeability is poor, and the application of OXC and ROADM technology to the optical cross-connect network still has the following problems: 1. The wavelength cannot realize complete non-blocking transmission in the cross-connect matrix, that is, it cannot Realize wavelength conversion, port versatility is poor; 2. The multi-dimensional ROADM solution does not have direction independence or wavelength independence for part or all of the service ports; 3. OXC equipment or ROADM system integration built by using small-scale optical switch arrays and WSS devices 4. Due to the large insertion loss of optical switches and WSS modules, the signal is prone to degradation, and the cross node has no service signal regeneration function

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