Achievement of fair and efficient regenerator allocations in translucent optical networks using the novel regenerator assignment algorithm

In this work, the Preventive Assignment of Regenerator (PAR) algorithm is proposed for regenerator allocation in translucent optical networks. The objective of this proposal is to reduce the blocking probability caused by the degradation that is generated by the establishment of a new optical circuit in the other circuits that are already established in the network. The PAR algorithm is compared to Minimal Assignment of Regenerator (MAR) and All Assignment of Regenerator (AAR) algorithms. The three algorithms were compared in terms of (i) blocking probability, (ii) utilization of regenerators, (iii) fairness in attending to the different source destination pairs and (iv) power consumption. This evaluation was applied using EON and USANET topologies. For the scenarios considered in this paper, the PAR algorithm achieves a superior performance when all metrics are considered together. In terms of blocking probability using the Dijkstra shortest path routing, the proposed algorithm achieved at least gain of 73% and 67% when compared to MAR and AAR, respectively.