CAREER: Integrated Dynamic Control for Robust Quality-of-Service Routing

该方案涉及大型网络的动态控制，这些网络集成了具有不同服务质量(Qos)要求的实时和非实时应用。为了满足这些要求，需要对路由、调度和接纳控制组件使用自适应算法。路由提供了一系列的路径选择，这些路径应该有足够的资源来满足应用的服务质量。调度分配链路资源(带宽、缓冲区等)在不同的服务等级之间。准入根据请求的服务质量和可用资源接受或拒绝新的传入应用。由于每个控制组件引起网络状态的变化并对其作出反应，因此它们之间存在强烈的依赖于时间的交互。通过考虑这种相互作用，建议的工作将开发将在性能上提供显著改进的服务质量路由算法。为此，我们将开发动态集成模型。一种新的数值分析技术，称为“Z迭代”，将被用来求解这些模型。Z迭代承诺为包含有线和无线链路的集成网络的瞬时性能提供快速和准确的解决方案。将考虑基于ATM和综合业务IP的网络。拟议的工作将为综合网络开发软件教育工具和项目，并将试验为教育多媒体应用程序提供服务质量支持。有关该项目的更多信息，请访问http://www.ccs.neu.edu/home/matta/proj/project.html

This proposal deals with the dynamic control of large networks that integrate real-time and non-real-time applications with heterogeneous Quality-of-Service (QoS) requirements. To meet these requirements, adaptive algorithms are needed for the routing, scheduling and admission control components. Routing provides a selection of routes, which should have sufficient resources to satisfy the applications' QoS. Scheduling allocates link resources (bandwidth, buffers, etc.) among the different service classes. Admission accepts or rejects a new incoming application, based on the requested QoS and the available resources. Because each control component causes and reacts to changes in the network state, there is a strong time-dependent interaction among them. By taking this interaction into account, the proposed work will develop QoS routing algorithms that will provide significant improvements in performance. To this end, we will develop dynamic integrated models. A novel numerical-analytical technique, called "Z-iteration", will be used to solve these models. The Z-iteration promises to provide rapid and accurate solutions to transient performance of integrated networks consisting of both wired and wireless links. Networks based on ATM and integrated services IP will be considered. The proposed work will develop software educational tools and projects for integrated networks, and will experiment with providing QoS support to educational multimedia applications. More information about this project can be found in http://www.ccs.neu.edu/home/matta/proj/project.html