Survivable Routing and Wavelength Assignment Strategy for Multiclass WDM Optical Networks

All optical WDM networks which are capable to provide multiple classes of services, we present survivable routing and wavelength assignment strategy. Different class of services are likely to be formed according to subscriber requests like bandwidth requirement, expected call holding time, average arrival rate of request etc. For such kind of multi class WDM networks where the survivability is an important issue, we propose a strategy which is capable to provide 100% protection to connection request and improved system performance. The proposed strategy (strategy 2) has been analyzed for multiclass traffic scenarios. Simulation results on different network topologies demonstrate that the performance of proposed strategy give satisfactory performance as compared to existing strategies (no protection and strategy 1) in terms of blocking probability using limited number of wavelengths with 100% survivability.