Networking

On the Dimensioning of WDM Optical Networks With Impairment-Aware Regeneration

Date Added: Feb 2011
Format: PDF

Although the problem of dimensioning an optical transport network is not new, the consideration of signal quality degradation caused by the optical medium calls for revisiting the problem in the context of dimensioning optical Wavelength Division Multiplexing (WDM) networks. This paper addresses the issue of minimum-cost planning of long-reach WDM networks in combination with optoelectronic signal regeneration as a countermeasure for sanitizing the signal quality of light-paths that are found to be impaired. The commonly used method of placing regenerators proportionally to the physical distance covered by a light-path is evaluated in a realistic dimensioning scenario and for various heterogeneity degrees of optical equipment, showing that it is plagued with a serious tradeoff between efficacy and cost of regeneration.