Heuristic Algorithms for Regenerator Assignment in Dynamic Translucent Elastic Optical Networks

In this paper, we propose two heuristics to perform regenerator assignment in translucent elastic optical networks. The first one tries to use the modulation format with the highest spectral efficiency, whereas the other one aims to transmit the optical signal as far as possible before it undergoes into a regeneration process. The former deploys several regenerators but saves bandwidth. On the other hand, the latter uses a lower number of regenerators, but it uses more bandwidth than the previous one. Different transmission bit rates and format modulations are considered in our simulations. The transmitter SSE noise and optical amplifiers ASE noises are considered in the physical impairments evaluation. We perform simulations to analyse the CapEx-performance trade-off of both strategies in terms of number of regenerators, available slots and blocking probability.