an optical switching device

Abstract

Embodiments of the present invention disclose an optical switching apparatus configured to implement sharing of wavelength adding / dropping and wavelength conversion ports, improve utilization of port resources, and reduce a packet loss rate. The optical switching apparatus includes: The optical switching apparatus includes an input port group, an input allocation matrix, a cross-connect matrix, an output allocation matrix, and an output port group. The input port group includes multiple input slots, and multiple input ports are provided in each input slot. The input allocation matrix includes multiple first optical switches, and an input port of the first optical switch is connected to an input port of the input slot. The cross-connect matrix includes multiple second optical switches, and an output port of the first optical switch is connected to an input port of the second optical switch. The output allocation matrix includes multiple third optical switches, and an input port of the third optical switch is connected to an output port of the second optical switch. The output port group includes multiple output slots, multiple output ports are provided in each output slot, and an output port of the output slot is connected to an output port of the third optical switch.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to an optical switching device. Background technique [0002] Dense Wavelength Division Multiplexing (DWDM) is a technology that combines a group of optical wavelengths and transmits them with one optical fiber, which can increase the bandwidth of the existing optical fiber backbone network. The total number of optical fibers required can be reduced for a given information transmission capacity. [0003] As the throughput capacity of switching nodes in the metropolitan area network and backbone network in WDM (Wavelength Division Multiplexing) optical networks is getting higher and higher, the rate of a single wavelength is also getting higher and higher. The complexity and cost of wavelength conversion equipment have increased dramatically, so the optical cross node needs to use multiple dimensions to share the structure of wavelength conversion and wavelength conversion. ...

AI Technical Summary

Problems solved by technology

[0005] In the optical switching method based on the wavelength plane described above, since each wavelength plane needs to reserve a certain port for wavelength up / down, when the ratio of up / down and wavelength conversion is high, it is easy for a certain wavelength to be fully up or down. Therefore, each wavelength plane needs to reserve enough ports, and the number of ports of the wavelength conversion switch also needs to be correspondingly large. If it is realized by an optical switch, it is difficult to realize in the current industry in terms of technology. If each wavelength When the number of ports reserved by the plane is small, it is easy to cause packet loss

In addition, since the ports on the wavelength plane are fixed for optical wave scheduling, and the ports on the wavelength conversion switch can only be fixed for up / down wavelength conversion and wavelength conversion, too many ports on the wavelength conversion switch will easily lead to waste of resources, and Poor flexibility

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