The Research Of Dynamic Routing And Wavelength Assignment Algorithm In Wdm Optical Networks

With the development of multimedia and network, the WDM optical network is considered the future of backbone network, due to its enormous bandwidth, high-speed, flexible performance and other superiority. Routing and Wavelength Assignment is an important issue in WDM networks, the reasonable RWA can not only enhance the availability of network resources, but also improve the network integrated performance. This thesis studies the dynamic routing and wavelength assignment algorithm in WDM optical networks, main work of this thesis is as follows:1.Introduce the basic principle, the growing history and the construct of the WDM optical networks.2.Introduce the concept of RWA and significance of research; research different type of RWA—static and dynamic, classify and compare some particularly assignments.3.The dynamic routing and wavelength assignment algorithms in WP networks are studied. Based on the traditional ADMH algorithm, by choose routing overall cost of links and priority differential plot of wavelength, a novel adaptive dynamic RWA algorithm LADMH is proposed. Simulation results show that the algorithms can significantly reduce blocking probability perior to the traditional algorithms.4.we propose a new weighted function for link cost assignments. The purpose of the cost function is to differentiate network in different traffic load. Based on the link cost assignments, one adaptive routing algorithm referred to as LWSCP are presented in the paper. Simulation results reveal that LWSCP can achieve lowest call blockingprobability than traditional adaptive routing algorithms.