Research Of SDN Networking Technology Based On User-Oriented Service

In modern times, user-oriented service of network is important for meeting users’customized demand. In conventional network, ISPs offer series of solutions ranging from private to intelligent lines. However, this kind of incremental evolution technology is still not enough. The network which becomes clumsier will hinder this kind of technology. Therefore, we need a clean-slate revolution, and SDN is such kind of technology.Software-Defined Networking (SDN) is one of the most hot research fields in network technology which will redefine the whole architecture. The characteristics including open southbound interface and programmable network appeal to the whole world. The industry of SDN ranging from OpenFlow switch, controller, and network application is beginning to boom. All of these make the user-oriented network possible.The task of user-oriented network in SDN can be divided into three phases. Firstly, users can reflect their demand in control plane of SDN through application. Then, controller will transform these demands into network semantics, and transmit instructions to data plane. Finally, the devices in data plane will forward packets on demand. The main three tasks in this paper are shown as follow.(1) In terms of network scale, the paper raised a networking model of SDN, called R-SDN. Besides OpenFlow switch and controller, there are also logical switches based on conception of virtualization, including root, parent, and son switches. By vitalizing the network layer by layer, R-SDN has the following three effects. Firstly, it is a universal model for varies network scale. Secondly, the recursion mechanism can increase efficiency of calculation. Last but not least, it owns characteristic of spanning tree.(2) The paper gave a routing algorithm based on Fibonacci heap in R-SDN. Controller can make use of this algorithm so that the overhead of calculation can be reduced. In terms of time complexity, I analysis with it by comparing with other two algorithms. In order to validate the effect of this improved algorithm, simulation has been made in matlab, and conclusions have been made based on simulation results.(3) In terms of traffic scheduling, this paper did four kinds of related strategy in SDN so that user can choose on demand, such as Round-Robin. When users finish choosing, the controller can transmit instruction to scheduler, and then it will implement the chosen strategy. This research will have the following two effects. Firstly, user can directly adjust traffic scheduling to their requirements. Secondly, all of these strategies will increase high availability of network.The related research findings have been published in WPMC and ICT international conference.