NR: Collaborative Research: DiffServ-Aware Multicast

支持qos的组应用程序的增加和重要性的增加，加上高速网络的进步，推动了对Internet上可伸缩和可部署的组通信体系结构、算法和协议的需求。这种应用的例子包括按需音频/视频服务、电话会议、服务器推送操作、远程教育和娱乐中的多媒体演示以及实时信息传播。这些应用程序消耗高网络带宽，需要QoS保证。多播和差异化服务（DiffServ）是解决这些需求的两种有效技术。DiffServ试图在Internet上提供可伸缩的QoS，而多播旨在最大限度地在组成员之间共享带宽。尽管这些技术具有互补的目标，但它们的共存带来了一些独特的挑战。本研究的目标是开发架构、算法和协议来应对这些挑战。这个合作项目特别集中在差分服务器感知多播的可行方法上，解决关键问题，如可伸缩性、多播树的构建和维护、异构QoS和SLA管理以及接收方发起的差异化服务。提出的研究将回答有关DiffServ多播的许多关键问题，这将使QoS多播在互联网上成为现实。

The proliferation and increasing importance of QoS-aware group applications coupled with the advancement in high-speed networking are driving the need for scalable and deployable group communication architectures, algorithms, and protocols over the Internet. Examples of such applications include on-demand audio/video services, teleconferencing, server push operations, multimedia presentations in distant education and entertainment, and real-time information dissemination. These applications consume high network bandwidth and demand QoS assurances. Multicasting and differentiated services (DiffServ) are the two effective technologies that address these requirements. DiffServ attempts to provide scalable QoS over the Internet, whereas multicasting aims at maximizing bandwidth sharing among the members of a group. Although these technologies have complementary goals, their coexistence introduces several unique challenges. The goal of this research is to develop architectures, algorithms, and protocols addressing these challenges. This collaborative project concentrates in particular on viable approaches for DiffServ-aware multicasting addressing key issues, such as scalability, multicast tree construction and maintenance, heterogeneous QoS and SLA management, and receiver-initiated differentiated services. The proposed research will answer many key questions pertaining to DiffServ multicasting, which will enable QoS multicasting over the Internet a reality.