| Popis: |
Challenges while designing algorithms in fixed WDM are easier than the flexible optical networks. The major challenges in flexible optical networks are in related with physical layer, routing, spectrum allocation (RSA) and dynamic traffic fluctuations. Spectrum allocation policies are used to minimize the cost of transponder and also to utilize spectrum efficiently. Spectrum allocation policies such as constant spectrum allocation (CSA), dynamic high expansion–low contraction (DHL) and dynamic alternate direction (DAD) used to avoid wastage of bandwidth. For these policies, blocking probability, cost of transponders and regenerators required are calculated using MATLAB software. |
