Design And Simulated Implementation Of Green Multicast Traffic Grooming Mechanism In Multi-Granularity Networks

With the vigorous development of the Internet throughout the world, new applications come out continually, especially applications such as Digital Broadcasting, the Internet of Things and Cloud Computing. More and more applications in network are one-to-many and many-to-many types, leading network traffic increase exponentially, which made WDM technology more popular. Although the network transmission capacity is increasing, the growing network traffic still poses a challenge for the transport mechanism. With the network device increased in size and complexity in recent years, excessive energy consumption problems arise since network equipment need to provide uninterrupted service. In addition, optical communication technology is gradually maturing which prompts the current backbone network to the direction of multi-granularity transport network. How to transfer more communication request on the premise of save more energy has become the most important problem to solve in future networks. Traffic grooming technology is an effective way to improve the utilization of bandwidth and decrease the energy consumption of network. Based on this background, several green multicast traffic grooming mechanisms in multi-granularity transport network are proposed.Multicast can be divided into two types which are one-to-many and many-to-many. The traffic grooming can also be divided into static grooming and dynamic grooming based on the request arrived is static or not. Static and dynamic one-to-many grooming, static and dynamic many-to-many grooming mechanisms are proposed in this paper. For one-to-many, traffic grooming algorithms based on tree are designed; for many-to-many, hub-based aggregation traffic grooming algorithms are designed. Multicast-Capable multi-granularity optical cross connect (MC MG-OXC) device is designed and introduced in this paper, which divided traffic into sub-wavelength, wavelength, waveband and fiber. Energy efficient traffic grooming mechanisms are designed and network grooming auxiliary graph is built in this paper, and several traffic grooming strategies are used on the auxiliary graph to groom traffic. Not only minimizing energy consumption is considered, but trigger of large granularity groom by small granularity grooming and QoS demand of traffic request are also introduced in the proposed traffic grooming mechanismsIn order to verify the effectiveness and feasibility of this four designed traffic grooming mechanisms, the simulation program is developed respectively with MyEclipse platform. The results show that the traffic grooming mechanisms proposed in this paper have better effect both in the aspect of traffic blocking rate and the aspect of energy saving.