SDN中基于用户服务等级目标的流量控制算法

Traffic Control Algorithms Based on User Service Level Object in SDN

SDN解决了传统IP网络异构性带来的配置管理困难、业务维护复杂等问题,流量控制算法成为SDN的研究热点。现有流量控制算法多为业务流的配置优化和网络整体性能的优化,缺乏面向用户需求的设计。然而,网络用户最关心的是自己业务的服务质量。不同业务流的QoS参数和目标不同,对传输链路性能提出了定量化的要求。针对这个问题,提出基于用户服务等级目标要求的流量控制算法。算法首先对多种QoS指标的业务流进行了分类,再结合业务流优先级和服务等级目标值的约束模型进行路由计算和资源分配。仿真实验证明,该算法能瞄准用户对业务流的QoS要求,精准地选择服务链路,达到多业务流QoS保障的目的。

SDN solves the problems of configuration management and service maintenance caused by heterogeneity of traditional IP network.Traffic control algorithm has become a research hotspot of SDN.The existing traffic control algorithms are mostly the configuration optimization of traffic flow and the optimization of overall network performance,lacking user-oriented demand design.However,the most important concern of network users is the quality of their own service.Different traffic flows have different QoS parameters and objectives,which put forward quantitative requirements for transmission link performance.To solve this problem,a traffic control algorithm based on user service level target is proposed.Firstly,the algorithm classifies the traffic with multiple QoS indicators,and then calculates the routing and resource allocation by combining the constraint model of traffic priority and service level target value.The simulation results show that the algorithm can aim at the user's demand for the QoS of service flow,select service links accurately,and achieve the goal of multi-service flow QoS guarantee.