Design And Simulated Implementation Of Grooming Mechanism In Green Networks

With the rapid development of Internet, people become increasingly depend on the network, the services that Internet provide to users become more complicated at the same time. Though the transmission capacity of the network is improved, the exponential growth of requirements’ bandwidth makes it more and more urgent to propose a more effectively transport mechanism to solve this problem. People should propose a mechanism which can transport as more traffic as possible with the minimum power consumption. In multi-layer multi-domain multi-granularity transport networks, traffic grooming technology is an effective way to improve the utilization of bandwidth and reduce the energy consumption of the network. Based on this background, this thesis proposes a traffic grooming mechanism in green network.According to whether the requirement is static or not, traffic grooming can be divided into two categories:static traffic grooming and dynamic traffic grooming. This thesis’s objective is to propose suitable mechanism to solve those two problems respectively. We design a static traffic grooming mechanism based on clustering. First, the network is divided into several clusters, finding head of each clusters. Then traffic is aggregated in this virtual star topology. At last route and assign the resource in the physical topology for the new requirements. Dynamic traffic grooming mechanism based on load balance using auxiliary graph is designed to solve the dynamic traffic grooming issue. First, layered auxiliary graph is constructed based on the resources and the physical topology. Then dynamic traffic is groomed on those graphs. When we groom the dynamic traffic, load balance is considered as well as trigger of large granularity groom by small granularity grooming. In this paper, we solve traffic grooming problem in multi-domain network. Thus grooming in inter-domain is also an important issue to solve. We design an inter-domain traffic grooming algorithm called "First overall and then the local" algorithm as the inter-domain grooming algorithm.Finally, in order to verify the effectiveness and feasibility of this two designed traffic grooming mechanism, the simulation program is developed respectively with VC++platform. The results show that the traffic grooming mechanisms designed in this paper have better effect both in the aspect of traffic blocking rate and the aspect of energy saving.