Wavelength label transmission method and device

Abstract

The present invention discloses a method and device for wavelength label transmission. The method comprises: packaging wavelength label information as a wavelength label information frame and encoding the wavelength label information frame; determining the low-frequency dither modulation frequency of the wavelength label according to the wavelength channel of the wavelength label information frame, modulating the encoded wavelength label information frame to the low-frequency dither modulation frequency, and sending the encoded wavelength label information frame through the wavelength channel; splitting a received optical signal, and performing the photovoltaic conversion and analog-to-digital conversion on one path of the optical signal; performing spectrum analysis on the converted optical signal , and obtaining the frequency value of the low-frequency dither frequency of the optical signal and the bit information carried by the optical signal; decoding the bit information, obtaining the wavelength label information frame, and thereby obtaining the wavelength label information. According to the present invention, fewer low-frequency dither frequencies are utilized to realize the modulation for a wavelength label signal, information, such as a wavelength signal source address, is sent by data frames carried by the wavelength label, and a check bit is used for timely detecting the situation of transmission errors of the wavelength label.

Description

technical field [0001] The invention relates to wavelength label technology, in particular to a wavelength label transmission method and device. Background technique [0002] The wavelength tag technology is used to realize the wavelength tracking function of the pure optical layer in the wavelength division multiplexing network, especially the optical add-drop multiplexing system with dynamically reconfigurable wavelength, which can distinguish and identify wavelengths from different addresses in the system. The wavelength label technology is realized by adding a wavelength label signal to each wavelength signal at the source end of the wavelength path of the wavelength division multiplexing optical switching system, and detecting and identifying the label of each wavelength passing through each point of the wavelength path. Wavelength path monitoring and automatic discovery and other functions. [0003] The wavelength label can be implemented by adding a top-tuning signal...

AI Technical Summary

Problems solved by technology

However, this method still has the following defects: the time length of the wavelength label at the receiving end increases with the increase of the number of network elements in the system. At least 64 intervals are required to distinguish the same wavelength from these 64 network elements, so the detection efficiency and detection time at the receiving end cannot be well controlled

[0006] In addition, the existing technology represented by the above-mentioned patents still has the following defects, that is, in the case of noise in the actual system, the receiving end may make a misjudgment, and the information of the wavelength and / or its source address carried by the wavelength label may be wrong. analysis, but the receiving end cannot actively discover and correct errors in the case of receiving errors

In summary, the existing wavelength label technology cannot fully meet the requirements of reliable and scalable transmission of wavelength labels in large-scale wavelength division multiplexing optical switching networks

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