Patent ID: 11882390
Assignee: SOOCHOW UNIVERSITY
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A system for allocating a dedicated protected spectrum based on crosstalk awareness, comprising:
a connection request module, configured to: initialize a space-division multiplexing elastic optical network, and generate a connection request;
a working path establishment module, configured to: calculate a plurality of working paths from a source node to a destination node, and determine whether the working paths are successfully established, wherein if not, the connection request is blocked, or if yes, the shortest path of the plurality of working paths is selected, a corresponding modulation format is selected according to the shortest path, and a quantity of spectrum slots required for the connection request and a first maximum allowable crosstalk threshold on a fiber optic link are determined according to a bandwidth demand of the connection request and the selected modulation format;
a core classification module, configured to: classify cores according to the quantity of required spectrum slots, set priorities for the cores, determine whether available spectrum blocks in the cores meet a spectrum consistency constraint and a spectrum continuity constraint, wherein if not, the connection request is blocked, or if yes, inter-core crosstalk values of all available spectrum blocks are calculated, and it is determined whether the first maximum allowable crosstalk threshold is exceeded, and if yes, the connection request is blocked, or if not, a spectrum block with the smallest crosstalk value is selected for spectrum allocation;
a dedicated protection path establishment module, configured to: delete the currently established working paths, calculate a plurality of dedicated protection paths from a source node to a destination node, determine whether the dedicated protection paths are successfully established, wherein if not, the connection request is blocked, or if yes, the shortest path of the plurality of dedicated protection paths is selected, a corresponding modulation format is selected according to the shortest path, and a quantity of spectrum slots required for the connection request and a second maximum allowable crosstalk threshold on a fiber optic link are determined according to a bandwidth demand of the connection request and the selected modulation format; and
a spectrum allocation module, configured to: classify cores according to the quantity of required spectrum slots, set priorities for the cores, and determine whether available spectrum blocks meet a spectrum consistency constraint and a spectrum continuity constraint, wherein if not, the connection request is blocked, or if yes, inter-core crosstalk values of all available spectrum blocks are calculated, and it is determined whether the second maximum allowable crosstalk threshold is exceeded, and if yes, the connection request is blocked, or if not, a spectrum block with the smallest crosstalk value is selected for spectrum allocation.