Dynamic Resource Allocation for All-Optical Multicast in Space Division Multiplexed Elastic Optical Networks

In recent years, the rapid growth of network traffic and the emergence of new Internet applications have required optical networks to continuously improve their capacity and flexible transmission capability. Spatial division multiplexed elastic optical networks (SDM-EONs) have become the most promising core architectures for future optical networks with their fine granularity, high capacity, and high transmission rate. In the paper, we study the routing, modulation level, spectrum, and core allocation (MC-RMSCA) problem for multicast services in SDM-EONs, building a network model using all-optical multicast in SDM-EONs, and then propose two heuristic algorithms for the problem to solve MC-RMSCA in dynamic scenarios. Simulation results show that, compared with the shortest-path-tree-based routing, modulation level spectrum, and core allocation (SPT-RMSCA) algorithm, the subtree-assisted routing, modulation level spectrum, and core allocation (STA-RMSCA) algorithm performs better in terms of blocking probability and spectrum utilization.