Research On Concurrency Service Performance Optimizating And QoS Mechanism In SDEN

Network service capability and its dynamic expansion on demand are the focus and core of next generation network research.In order to adapt to the elastic growth of network services,meet the changing service needs of users,and solve the problems of weak service capacity and poor extensibility of traditional network,SDEN,with network service capability as the core,has established a dynamic service delivery method that can meet the growing new demands of applications.SDEN decouples the control logic of the service and the basic functional logic of the protocol,abstracts and summarize the common mechanism and processing mode of the traditional protocol,and then establishes the set of atomic services and its application control logic dynamically.By deploying and maintaining atomic services and constructing service business logic dynamically,SDEN can achieve extensibility of network service capability.Although SDEN provides an effective solution to solve the problem of traditional network service’s extension,the current research on SDEN focuses on the network system architecture and the design of each functional module,and lacks the research on the concurrent service capability and QoS mechanism,which restricts its large-scale application and deployment.Regarding the limited service ability is difficult to deal with the current large traffic,high concurrency network environment and changeable user demands,network service capability and its support mechanism of SDEN are further studied in this paper.Aiming at improving the network service capability of SDEN,the paper focuses on the research of its concurrent service capability and related QoS mechanism.First,according to the running principle and the way of service provision of SDEN,the concurrency ability is studied and found that atomic service is the fundamental of SDEN’s concurrency service ability.Aiming at the defect that the current atomic service doesn’t support concurrent requests,the new atomic service model supporting concurrency is established.Secondly,in order to evaluate and analyze the performance of concurrent services,the evaluation indexes and methods related to the performance of concurrent services are proposed.Then,based on the queue technology widely used in SDEN,the QoS mechanism of SDEN is studied and designed,including a common QoS mechanism based on queue and scheduling algorithm and an adaptive QoS mechanism based on dynamic adjustment of network state.Finally,based on the concurrency service performance optimizing method and QoS mechanism proposed in this paper,the corresponding modules of SDEN prototype system are optimized and reconstructed.And then the feasibility of the method and mechanism is verified and analyzed by design several experiments.The experimental results show that the concurrent service performance optimizing method and QoS mechanism proposed in this paper are feasible and can effectively improve the network performance and network service capability.Specifically,the improved SDEN system has improved the processing capacity of concurrenct requests by more than 2 times and the quality of serice by 24%.