Abstract: Aiming at the survivability requirements of space division multiplexing elastic optical networks (SDM-EONs), this paper proposes a comprehensive crosstalk-aware routing and spectrum allocation (IA-IRSA) scheme. Firstly, it establishes a crosstalk evaluation model, including adjacent crosstalk and band-limited crosstalk, and combine them with spectrum resource occupancy to form a comprehensive crosstalk model. Secondly, it updates the cost matrix of the fiber link by sensing the comprehensive crosstalk on the link in real time, so as to minimize the crosstalk between the allocated fiber links. At the same time, it detects the location that causes less blocking to perform spectrum allocation, so as to realize the decrease of network blocking probability and the increase of network resource utilization. Simulation results show that compared with the traditional scheme, this work significantly lower crosstalk, improves network survivability, and improves performance such as network blocking probability and network resource utilization.

Key words: SDM-EONs, crosstalk aware, survivability, blocking probability