Joint grooming capability and wavelength number optimization

In switched optical networks traffic grooming is a key factor in efficient bandwidth utilization. Without it a single traffic demand would occupy a full wavelength channel. However, it is not necessary to install grooming capability in all nodes of a network. Furthermore it is also unnecessary to equip all grooming nodes with full grooming capability. We can reduce the costs by deploying only the necessary grooming capacity. From a design point of view this means that not only the grooming capable nodes should be selected, but also the necessary grooming port number is to be determined. In our paper we propose algorithms which use iterative simulations to solve this problem.