Key Technology Research And Prototype Developmentfor The Controller Of SPTN

In decades, the traffic of network has been multiplied with the expansion of Internet. Users need not only the higher rate of service response with larger bandwidth, but also the fine self-services. Due to the self-limitations of traditional distributed network, it is difficult to carry out centralized network control for PTN. Beside that, users' permission is not given by PTN for adjusting bandwidth. So, it is hard for PTN to get rid of the trend of being pipeline. In this case, SPTN came into being as a result of introducing SDN technology into PTN. Based on the intelligent control plane, SPTN is able to construct the on-demand network and carry out network expansion easily. But, there's still plenty spacefor improvement of the technologies used in the SPTN controller nowadays, such as routing scheme. The Under these circumstances, this paper makes the research on the routing/QoS used in the D-Controller of SPTN, which includes high-speed parallelrouting scheme of single domain, function design of QoS/OAM based on logic centralized control and the development of the D-Controller. As result, the main works of this paper are listed below:Firstly, routing efficiency and accuracy rate are key indicators of SPTN. But there are conflicts between improving parallel routing efficiency and reducing resource conflict rate. In order to solve this problem,this paper designed and proposed a high-speed parallel routing scheme. This paper adopted multiple computing instances to ensure routing efficiency at first. And then, this paper used a temporary resource-locked-state mechanism and temporary TED database to ensure high routing computation accuracy. The simulation results show that, the scheme can provide a higher routingcomputation rate and eliminate resource collision rate of the setup-delay-bound LSP requests.Secondly, this paper analyzed the demands of QoS/OAM management module. Then this paper extended the OpenFlow protocol combined with the demand of equipment management module of SPTN.Based on that, this paper designed and developed those modules.Thirdly, this paper took part in the project to design and build the SPTN D-Controller platform. Based on that, this paper verified the management module of QoS/OAM .The experiment results show thatthe design achieves the target demand and the controller can deploy related flow table correctly.