多业务IP网络呼叫接纳控制模型和算法

Call Admission Control Model and Algorithms for Multi-services IP Networks

呼叫接纳控制(CAC)是多业务IP网络QoS的关键技术。文章主要研究在采用多协议标记交换(MPLS)传送机制的区分服务(DiffServ)网络中引入带宽代理(BB)资源管理实体条件下的呼叫接纳控制模型和算法。文章在分析比较三类常用呼叫接纳控制技术的基础上,提出了基于参数模型和网络测量相结合的控制模型,给出了该模型的核心控制算法,设计了算法实现流程,并在ns-2.26上进行了仿真实验。仿真结果表明,该文提出的控制模型和算法既能确保各类业务所需的QoS,又能有效地提高网络资源利用率。

Call Admission Control(CAC) is the key technology for QoS of multi-service IP networks.The research focuses on CAC model and algorithms under the DiffServ network environment using MPLS transport mechanism and Bandwidth Broker(BB) resource management entity.Following the comparative analysis of three types of commonly-used CAC technologies,a control model based on the integration of parametric model and network measurement is proposed.The key control algorithms involved in the model are given and the algorithm implementation scheme is designed.Emulation is conducted on ns-2.26 platform.The results of the emulation have shown that the proposed control model and algorithms not only can guarantee the required QoS for different services but also can effectively enhance the utilization efficiency of network resources.