Design And Simulated Implementation Of Energy-Saving Grooming Mechanism In Multi-Granularity Transport Networks

With the rapid development of Internet, people put forward higher requirements on the capacity arid performance of the data transmission system. Today; since the power resources increasingly become tight in the worldwide, how to reduce the network energy consumption as much as possible meanwhile meet the growing bandwidth demand of users has become the primary considered issue for network operators. As the core part of next generation backbone transmission network, multi-granularity transport networks attract widespread attention because of its significant advantage of high bandwidth and energy-saving. In multi-granularity transport networks, a large of traffic in IP layer can be groomed into the optical layer through traffic grooming technology to effectively improve the bandwidth utilization and reduce energy consumption and equipment costs. Under this background, this thesis studies the energy-saving grooming mechanism of multi-granularity transport networks.In this thesis, the energy-aware network model is firstly designed which contains the hierarchical node structure. Then, an auxiliary layered grooming graph is designed based on this node structure, and the power consumption of network is detailedly analyzed and calculated. In the following, three energy-aware traffic grooming algorithms are given by using three traditional grooming strategies on this energy-aware network model. By comparing the three energy-aware algorithms and introducing the "spectator node" concept, firstly a new energy-aware adaptive IP layer priority traffic grooming algorithm is proposed. Secondly, in allusion to the problem of high blocking probability for large capacity traffic access, bifurcation multipath based energy-saving grooming algorithm is designed in this thesis on use of bifurcation traffic strategy. In addition, so as to further improve the utilization of wavelength resources, through considering one wavelength to be shared by multiple traffic with Time Division Multiplexing technology and introducing the idea of game and nash equilibrium into traffic grooming algorithm, a game based energy saving grooming algorithm is designed in this thesis.Finally, in order to verify the effectiveness and feasibility of designed energy-saving grooming mechanism, the corresponding simulation program is developed for the traffic grooming algorithms. with VC++platform in this thesis. By running. the.algorithms implementation and evaluating the performance with baseline algorithm; the. results show that the energy-saving traffic grooming mechanism in the thesis not only can effectively fulfill the grooming of connection requests but also has a better energy-saving effect.