Optimization Of Dynamic Rwa Algorithm In Wdm Optical Networks

In wavelength division multiplexing(WDM, Wavelength Division Multiplexing) optical networks, the fiber-optic network usage and the multiplexednumber of wavelengths on each fiber link severely limit the maximum saturating capacity of communication serviceprovided by the network. considering the constraints of the network, it’s imperative to study how to select the best route for connection requestsby the light wavelength routing algorithm, and assign the appropriate wavelength resources so that the overall performance of the entire network can achieve optimal. Based on the research and analysis on the previous dynamic routing wavelength assignment(RWA, Routing and Wavelength Assignment) algorithm, the improved dynamic RWA optimization algorithm is proposed in this dissertation.First of all, a minimum link weights priority algorithm is proposed based on the principle of consistent wavelength in this dissertation. Based on the wavelength layered graph model, the several conditions such as the link length, the number of fiber, the spare virtual link dynamic optical wavelength is considered in this improved algorithm. It chooses wavelength resources by the priority-based wavelength assignment policy, so it can get a more balanced distribution of network traffics and a lower blocking probability of the network.Secondly, A RWA optimization algorithm based on the business priorities is also presented. When distinguishing the business priority, the wavelength and link reliability is taken into account in the algorithm.