Graph based signal processing for optical networks

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The PhD project will explore using graph based signal processing for the designof future optical networks, where IP routing is cognisant of the underpinning physicallayer. The project will include both theory and simulation with the student required tocreate a highly flexible simulation framework to analyse the NP complete problem ofrouting in optical networks. The resulting simulator will utilise knowledge of thephysical layer (fibre parameters, optical amplifier characteristics as well as thetransceiver characteristics) to enable routing using a combination of space andwavelength domains. The simulator will incorporate the heterogenous nature of realoptical networks (e.g. network flows are not always symmetric and also the traffic matrixis often weighted towards a few key nodes, such as the international internet exchanges inthe UK network), to define the optimal network architecture for future backbone opticalnetworks.