PID strategies for the dynamic allocation of resources in LR-Ethernet Passive Optical Networks

In this article an efficient method to allocate bandwidth in high coverage Passive Optical Networks (PONs) based on Proportional-Integral-Derivative (PID) strategies is proposed. The novelty of this proposal relies on the fact that this is the first one which applies PID policies to control a network parameter, such as the bandwidth in these networks. Contrary to other proposed algorithms, the bandwidth assignation made with PID controllers provide a more stable and quicker response than the one achieved by other proposals. As these strategies take into consideration present, past and future errors in the bandwidth adjustment, this self-adapting technique leads to a very robust process. Simulations results exhibit that not only are they faster and more stable than other algorithms, but also they auto-adapt very efficiently the resources when facing changes in the bandwidth conditions. Another great strength of these techniques is that they can be easily extended to control other critical network parameters such as the delay or packet losses and they can be directly applied in PONs with different end-to-end distances.