Design And Implementation Of Energy-Saving Routing Protocol In Multi-Granularity Transport Network

The rapid development of Internet has brought great convenience on people’s working and living, and it has been producing profound effect on the entire society. With the increasing variety of network services and fast growth in demand for various types of network applications, the network scale is rapidly expending, and the complexity of network equipment is also increasing, which make that the over energy consumption of network is becoming more and more serious. Thus, the concept of Green Network is proposed which studies the energy-efficient network communication technology. Studying energy-saving routing protocol in multi-granularity transport network can effectively reduce network energy consumption, which is an important way to achieve Green Network.In this thesis, an energy-saving routing protocol in multi-granularity transport network is designed and implemented, which includes information sensing module, hibernation behavior module and energy-saving routing module. In the information sensing module, router’s information sensing ability is enhanced, making that the router can sense more comprehensive link information, node information and traffic information, and all the above sensing behaviors are effectively managed; the protocol messages used to spread information are extended in this module, and the information sensed is spread to other nodes quickly to update the protocol database; what’s more, the hibernation level is changed adaptively in cross-layer adjustment in this module. In the hibernation behavior module, the temporary hibernation policy is introduced into multi-granularity transport network. The interface traffic is predicted based on historical traffic data, and the devices that are predicted to hibernate should migrate the services and determine the hibernating time before they hibernate, and the hibernating devices should wake up at an appropriate time to update link information or transfer service. The protocol routing capability is enhanced in energy-saving routing module, the path with low energy consumption that meets the Quality of Service (QoS) is found in the module, on which the resource is reserved and the LSP tunnel is established, and the established LSP tunnel can be migrated with Gaming when necessary, to reduce energy consumption of path and increase free links to make them hibernate, so that the network energy consumption can be reduced. A Colored Petri Net (CPN) is used to describe the protocol and the properties of reachability, controllability, coordination, energy-saving and adaptability are summarized and verified.The energy-saving routing protocol in multi-granularity transport network designed in this thesis is implemented based on GMPLS (Generalized Multi-protocol Label Switching), and it’s deployed on prototype system and evaluated. The experimental results show that the designed routing protocol can effectively reduce the energy consumption of network while meeting the QoS requirements and the protocol has good performance.