On Providing Quality-of-Service Control for Core-Based Multicast Routing

为基于核心的组播路由提供服务质量控制

• 批准号: 9804993
• 负责人: Jennifer Hou
• 金额: $ 22万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2002-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9804993&HistoricalAwards=false
• 关键词: Providing; Quality; Service; Control; Core

There has been an increasing need of highly predictable, timely, and dependable communication services with QoS guarantees on an end-to-end basis either for embedded real-time applications or for multimedia-integrated distributed control. In particular, the RSVP Working Group of the IETF has developed a resource ReSerVation Protocol (RSVP) protocol to provide receiver-initiated setup of resource reservations for unicast/multicast data flows. RSVP supports receiver-initiated, fixed/shared reservation styles under the assumption that a underlying routing protocol is available to provide unicast routes/multicast trees with sufficient resources to maintain adequate QoS. Unfortunately, most of the currently operational multicast routing protocols do not explicitly support QoS (in the form of end-to-end delay bound, end-to-end inter-destination delay jitter bound, and minimum guaranteed bandwidth). The goal of the proposed research is thus to develop and evaluate a QoS routing framework and its associated admission control, member join/leave procedures, and information update procedures, to allow deployment of QoS routing capabilities in core-based multicast routing protocols. The proposed research is a combination of two synergistic components: establishment of theoretical base for, and development of, all the component schemes in a well-defined analytic framework and their validation with software system building and experiments. We will pursue this research by (i) devising effective admission tests to verify whether or not a multicast group member may join the multicast tree, while not violating existing QoS guarantees to other on-tree members; (ii) investigating the minimum set of information/state required for admission tests in the context of the controlled-load service and the guaranteed QoS service with various reservation styles as proposed in RSVP; (iii) developing (with consideration of the scalability issue) effective information update and state refresh procedures that can be read ily integrated with the soft state refresh echanism that exist in most multicast routing protocols that exploit the soft state concept; and (iv) building an experimental software using the GateD multicast source codes distributed by Merit Network, Inc., defining and implementing a rich, well-defined interface with RSVP (which may require minor changes in RSRR, the routing interface for RSVP), and developing application level libraries to exploit the proposed services to provide a suite of multicast services with different levels of QoS. For more information, please refer to the project web page (http://eewww.eng.ohio-state.edu/drcl/grants/qosr98/). On providing quality-of-service control for core-based multicast routing. Attachment Converted: C:\EUDORA\ATTACH\form1239.ps Attachment Converted: C:\EUDORA\ATTACH\form1239.p

无论是嵌入式实时应用还是多媒体集成分布式控制，都越来越需要具有端到端QoS保证的高度可预测、及时和可靠的通信服务。 特别地，IETF的RSVP工作组已经开发了资源预留协议（RSVP）协议，以提供用于单播/多播数据流的资源预留的接收器发起的建立。 RSVP支持接收方发起的、固定/共享的预留样式，假设是底层路由协议可用于提供具有足够资源的单播路由/多播树以维持足够的QoS。 不幸的是，大多数当前可操作的多播路由协议不显式地支持QoS（以端到端延迟界限、端到端目的地间延迟抖动界限和最小保证带宽的形式）。 因此，建议的研究的目标是开发和评估QoS路由框架及其相关的准入控制，成员加入/离开程序，和信息更新程序，允许部署QoS路由功能的核心为基础的组播路由协议。 建议的研究是一个组合的两个协同组件：建立理论基础，和发展，所有的组件计划在一个定义明确的分析框架和软件系统建设和实验验证。 我们将继续这项研究，（i）设计有效的准入测试，以验证是否一个组播组成员可以加入多播树，而不违反现有的QoS保证，以其他树上的成员;（ii）调查的最小信息/状态集的上下文中的控制负载服务和保证QoS服务的各种预留风格的RSVP建议的准入测试所需的;（iii）开发（考虑到可扩展性问题）有效的信息更新和状态刷新过程，其可以与存在于利用软状态概念的大多数多播路由协议中的软状态刷新机制可读地集成;以及 (iv)使用Merit Network，Inc.发布的GateD多播源代码构建实验软件，定义和实现丰富的、定义良好的与RSVP的接口（这可能需要对RSRR、用于RSVP的路由接口进行微小的改变），以及开发应用级库以利用所提出的服务来提供一套具有不同QoS级别的多播服务。 欲了解更多信息，请参阅项目网页（http：//eewww.eng.ohio-state.edu/drcl/grants/qosr98/）。为核心多播路由提供服务质量控制。 附件转换：C：\EUDORA\ATTACH\form1239.ps 附件转换：C：\EUDORA\ATTACH\form1239.p