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In this paper, the authors present a multi-objective Integer Linear Program (ILP) for the joint throughput optimization and traffic engineering problem in Wavelength-Division Multiplexing (WDM) networks. The proposed model simultaneously maximizes the aggregated throughput, minimizes the resource consumption, and achieves load balancing by minimizing the Maximum Link Utilization (MLU). Even though the ILP is NPhard, the authors demonstrate its application in a 14-node network. In addition to the ILP, the authors propose a heuristic algorithm which can be implemented in a distributed manner. The proposed algorithm addresses the multi-objective problem as an e-constraint problem, upper bounding the per-route resource consumption and maximizing the throughput by routing through multiple widest paths.
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