Methods for in-service wavelength upgrade and system performance optimization in WDM optical networks
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United States of America Patent
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Issued Date -
Oct 21, 2004
app pub date -
Jul 23, 2002
filing date -
Jul 23, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of adding wavelengths to an 'in-service' WDM optical network system carrying live traffic. The method divides the wavelength into groups and adds each group of wavelengths into the working system in a parallel way by determining the desired TX launch power change for each wavelength from a predetermined value and applying the power changes for the group all together. When the system performance degradation happens after wavelengths addition, a wavelength power balance method according to another aspect of this invention can be applied to optimize the system performance. The power balance method first identifies the wavelengths to be optimized and classifies the wavelengths into controllable and reserved wavelengths; the total power available for wavelength adjustment is then determined; for each controllable wavelength, the required TX launch power which will bring the wavelength to meet the desired performance is determined and applied.
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