Routing calculation, core selection, spectrum allocation method and system based on cross-talk perception

The invention relates to a routing calculation, core selection, spectrum allocation method and system based on cross-talk perception, which are designed to solve the cross-talk problem of adjacent cores in a multi-core optical network. The routing calculation, core selection, spectrum allocation method based on cross-talk perception includes the following steps: calculating the working path for each connection request, and carrying out core selection according to the connection request classification principle; searching for and allocating spectrum resources on the working paths of the connection requests according to the constraints of spectrum continuity and spectrum consistency and the -talk threshold constraints, and establishing connection requests in a spectrum flexible optical network; and calculating the spectrum utilization rate and connection request blocking rate of the network according to the status of spectrum resource occupied by each fiber link. According to the invention, the cross-talk value