Research On Optical Layer Resource Scheduling Mechanism Based On Network Function Virtualization (NFV)

With the rapid development of the Internet, the advantages of optical backbone network, such as large capacity, high transmission rate and long transmission distance, become more and more important. The next iteration of Internet business, a new type of business and the influx of new users, resulting in that network must have the characteristics of fast delivery, flexible scheduling. However, the current status of optical network and element is rigid closed tight coupling of hardware and software, which can not meet the needs of future business development. In this situation, the network function virtualization technology (Network Function Virtualization, NFV) is the key to solve the above problems.According to the business booming development of optical network support, cyber source virtualization scheduling, physical layer security needs, make introduction of NFV into optical network. We use optical network architecture to establish a SDN+NFV model, put forward two kinds of NFV optical network resources scheduling method, design a virtual resource scheduling for physical optical network layer security function, and complete the simulation of safety factor weighted routing strategy, to verify the correctness of the proposed scheduling strategy. The main work and innovations are as follows:Firstly, aiming at the optical network field of software defined network and network virtualization capabilities is not combined deep enough,proposed a optical SDN+NFV network architecture, build a virtual network function of multi coordinated control IP/WDM/Flexible scheduling in heterogeneous network domain, put forward the control plane network function virtualization management ring structure, and optical NFV node architecture proposed in the data plane. Cooperative scheduling and complete the virtual cyber source through collaboration with NFV light controller node.Secondly, based on the overall structure of the SDN+NFV, according to the optical network and optical network IP cyber source data fusion,application of load redirection scheduling two specific scenarios, design the optical domain node dynamic integration strategy and load balancing redirection strategy, under the framework of NFV, proposed the strategy implementation mechanism and a corresponding mechanism of Openflow protocol.Thirdly. According to the characteristics of vulnerable physical layer in optical network, a high power attack weighted probability model are constructed. Based on the SDN+NFV optical network architecture, specific data plane safety parameters acquisition requirements proposed NFV node load optical signal detecting element, and make design of the virtual scheduling process of physical layer security signal detection, business safety routing and route scheduling network function. The simulation shows that the scheduling strategy for physical layer of optical network security function of virtual resource scheduling method in low frequency(less than 1%) attack situation, reduce attack damage ratio of about 15%?50% calculate way without protection, and compared to the AG-disjoint full protection method has a lower blocking rate and higher rate of resources utilization.