Weight distributed spectrum allocation in flexible-grid optical networks

An Elastic or flexible-grid Optical Network (EON) is an emerging technology for efficient resource utilization. In this paper, a Weight distributed service provisioning (WDSP) algorithm for routing and spectrum assignment (RSA) based on a request for a connection is proposed. This novel technique for spectrum allocation based on the demands of the connection request reduces the blocking of connections due to improper spectrum assignment. The connection requests are classified into two categories based on demand: small and large connection requests. The smaller size connection requests are assigned to the lower index slots, and the larger size connection requests are assigned to the highest index slots. By implementing this approach, a relatively large number of connection requests can be handled via the availability of a large set of contiguous slots. The simulation results illustrate that the proposed algorithm is relatively more efficient due to enhanced blocking performance; effective spectrum efficiency can be achieved.