Research Of Software Defined Dynamic Resource Management And Control Technology For Optical Access Network

As the last mile of the information superhighway, access network is the core infrastructure to support the various Internet services. The rapid growth of terminal access equipment and broadband services cause the scale and complexity of the access network increases. How to efficiently utilize the huge bandwidth resources to provide differentiated services and flexible service, low-cost green operations management, becomes an important demand of the next-generation optical access beyond bandwidth upgrade for global telecom operators. It is difficult for the traditional optical access network without global control architecture and resource optimization in real-time feedback mechanism to meet these requirements.To solve these problems and challenges, this paper mainly researches on software defined network and centralized control for optical access network, the paper launches research work around application scenarios about resource management, QoS and rapid service introduction. The network architecture, implementation mechanism and algorithm strategy are analyzed and demonstrated on the experiment and simulation platform of software defined optical access network.The specific outcomes are expressed as follows:Firstly, for the future optical access network flexible resources scheduling and highly customized quality of service requirements, software defined optical access network (SDOAN) centralized control architecture is proposed with implementation of protocol extension and implementation mechanism. Compared to the current distributed network management system, SDOAN make it possible to efficient use of network resources, low-cost remote management and customized service introduction with real-time control and global network perspectives across different access domains. Secondly, based on SDOAN centralized control architecture, dynamic bandwidth optimization algorithm is proposed for heterogeneous network. The centralized controller abstract network resources of access and aggregation network, then achieve optimal allocation of bandwidth resources with global real-time scheduling strategy and realize the fairness of bandwidth resource allocation with recovery strategy. Under the scenarios of multi-access domain switching, simulation results show that SDOAN dynamic bandwidth optimization algorithm can effectively improve resource utilization (resource utilization increases20%under aggregate offered load80%cases), especially ensure the consistency of the user experience in the case of multi-access scene change.Thirdly, around the customized service introduction requirements, the service-driven user-customizable QoS guarantee mechanism and rapid broadband customized service introduction solution is researched to provide high level of personalized value-added telecom services for Internet content providers and end users through a highly abstract virtualization service platform. Finally, optical access network centralized control experimental platform is developed based on the NOX controller to demonstrate the architecture and algorithm proposed in this paper by streaming video service.