Design And Simulation Implementation For Dynamic Multicast Grooming Protection Algorithm In Green Optical Networks

With the rapid development of Internet, the energy consumption of network equipment increases. Because of the energy shortage of the world and the global greenhouse effect, the problem of energy consumption has eventually become one of barriers to the network growth. Therefore, the development of the green network is particularly important. Meanwhile, with the rapid development of multimedia services, multicast services become more popular, so the multicast traffic grooming has become a hot issue in recent years. In WDM optical network, each wavelength transports with a high rate of Gigabit per second, the traffic interruption caused by network failures will lead to huge economic losses. Therefor, it is necessary to study WDM optical networks survivability.This thesis focuses on the dynamic multicast grooming based on spanning path protection problem in green optical network. According to node structure, multicast grooming strategies and different energy saving techniques, this thesis designs an auxiliary graph model and an optimization model. The auxiliary graph model includes a virtual topology graph and an integrated graph, where each link has its own state. Before routing, the link-cost can be reseted accordance with the state to provide a favorable premise for equipment sleeping. In addition to the optical bypass, traffic grooming and equipment sleeping techniques, the optimization model which concentrates on minimizing total energy consumption also consideres the factor of time. On the basis of these two models, this thesis designs a dynamic multicast green grooming based on spanning path dedicated protection algorigm. In consideration of utilizing network bandwidth resources effectively with the protection mechanism of sharing, this thesis designs a dynamic multicast green grooming based on spanning path cross sharing protection algorithm as well.This thesis makes the simulation and analysis for designed algorithms. Simulation results show that the proposed multicast traffic green grooming based on spanning path dedicated and cross sharing protection algorithms not noly have lower blocking probability and higher work band ratio, but also save more energy.