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US 8,027,585 B2Granted
Optical communication method, optical communication device, and optical communication system
AssigneeNEC Corporation
InventorYoshitaka Yokoyama
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AssigneeNEC Corporation
InventorYoshitaka Yokoyama
Estimating the term…
The present invention relates to controlling wavelength switching in a plurality of nodes that are provided to increase the distance of signal transmission in inverse MUX transmission in which a high-speed line is divided into a plurality of low-speed lines for transmission. A maximum skew occurring between adjacent nodes is measured, and switching of wavelength channels is performed in one or a plurality of nodes on the basis of the measured maximum skew to keep the skew of the entire inverse MUX transmission system at or below a prescribed value. The optical communication device is provided with an NNI functional block to which high-speed lines on the transmission channel side are connected, and a UNI functional block to which low-speed lines on the client side are connected.
An optical communication method in which a plurality of nodes each having a cross-connect switch and a WDM (wavelength division multiplexing) transmission function is provided to an inverse MUX transmission channel, a plurality of wavelength channels is present between adjacent nodes, and a skew that occurs in said inverse MUX transmission channel is kept below a prescribed value;
An optical communication device provided to an inverse MUX transmission channel, comprising a plurality of nodes that each has a cross-connect switch and a WDM (wavelength division multiplexing) transmission function, and a skew measurement device provided to each of said plurality of nodes;
Dependencies are inferred from the claim text.