Heuristic Algorithms for Demand Provisioning in Hybrid Single/Multi-band Elastic Optical Networks

Since upgrading the single-band EON (SB-EON) to multi-band (MB-EON) is a staged and lengthy process, fibers with SB and MB transmission capacities may coexist for an extend period. This type of network is referred to as a hybrid SB/MB EON. In this article, a family of routing, band, and spectrum allocation algorithms for hybrid SB/MB-EONs is proposed. The bandwidth blocking probability (BBP) of the proposed algorithms is simulated and compared. The proposed heuristic algorithms are also evaluatedon networks with different numbers of fibers with MB transmission. The results show that the three new algorithms outperform the previous proposal method V3 on a hybrid SB/MB- EON with heavier loads. These findings are expected to contribute to the advancement of dynamic resource allocation in SB/MB-EONs and network upgrades.