Research Proposals
Crosstalk Estimation Method in All-Optical Networks
In emerging All-Optical Networks (AONs), efficient monitoring and estimation of signal quality along a lightpath are of highest interest because of their importance in diagnosing and assessing the overall health of the network. This is because transmission in these networks is limited by a number of effects such as optical crosstalk and amplified spontaneous emission. In particular, crosstalk is additive and can be exploited to perform service disruption attacks upon the whole network. Since these attacks can spread rapidly through the network, causing additional awkward failures and triggering multiple undesirable alarms, they must be detected and identified at any point in the network where they may occur. Due to transparency , this requires particularly the availability of expert diagnostic techniques to measure and control the smallest granular component, the wavelength channel. However, to monitor all wavelengths at several detection points in any AON node in the network is likely to be a very expensive solution. In this work we will analyze optical crosstalk forms that may arise in Optical Cross-Connect (OXC) nodes from AON components they employ. Then, we will consider a novel method that can manage with fewer measurements and less monitoring information for estimating the health of established lightpaths and assessing the proper operation of AON components. As a direct consequence, this method can be used for localizing multiple crosstalk-attacks and identifying their natures in AONs offering the benefit of relaxing the high cost and complexity of signal quality monitoring for future AON management solutions.
