On Optimization Issues In Supporting High Bandwidth Multimedia Applications

尽管互联网取得了成功，但它的带宽过度配置、连接中的冗余以及对操作的理解增加了，但互联网用户仍然经历着拥塞和服务中断。此外，网络应用日益复杂，需要更高的可靠性和更高的带宽。尤其是高带宽的一对多多媒体应用的普及迫在眉睫。如果没有有效的网络设计方案，用户不可避免地会遇到偶尔的网络服务降级或故障。本研究旨在通过多层视角设计、实施和评估一对多高带宽应用的网络体系结构，以实现最佳的资源使用、性能和可靠性。PI将在光层支持单播的同时开发可扩展和高效的多播虚拟拓扑设计和重新配置算法；研究IP Over光网络模型中开销、可扩展性和可靠性之间的权衡；探索高效的多媒体传输方案，特别是在多提供商网络上；分析多播应用的多层交互和必要的合作。其智能优势在于在单播应用存在的情况下采取整体的多层方法来支持大规模的组播，从而实际地解决优化问题。多层的隐式或显式协作为一对多高带宽应用的网络设计提供了新的维度。优化算法的开发和创新绩效效益的量化预计将在计算机科学中得到广泛应用。该项目将以多种方式广泛影响大学、产业界和研究界，通过接触研究项目代表不足的群体的学生，通过将最新研究进展整合到本科生和研究生课程的教学活动中来提高教育质量，以及使项目成果广泛可用。

Despite the success of the Internet, its bandwidth overprovisioning, redundancy in its connectivity, and increased understanding of operation, Internet users still experience congestion and service disruption. Furthermore, network applications are increasingly sophisticated requiring greater reliability and higher bandwidth. Particularly proliferation of high bandwidth one-to-many multimedia applications is imminent. Without effective network design schemes in place, users inevitably encounter occasional network service degradation or breakdowns. This research aims to design, implement, and evaluate network architecture for one-to-many high bandwidth applications through multiple layer perspectives toward achieving optimal resource usage, performance and reliability. The PI will develop scalable and efficient algorithms of design and reconfiguration of virtual topologies for multicast while supporting unicast in optical layer; investigate the trade-off among overhead, scalability, and reliability in IP over optical network models; explore efficient multimedia delivery schemes particularly over multi-provider networks; and analyze multi-layer interaction and necessary cooperation for multicast applications. The intellectual merit lies in taking a holistic multi-layer approach to large scale multicast support in the presence of unicast applications so as to address the optimization issues practically. The implicit or explicit cooperation of multiple layers provides new dimensions to network design for one-to-many high bandwidth applications. The developing of optimization algorithms and the quantifying the performance benefits of innovations are expected to have a wide applicability in computer science.The project will broadly impact the universities, industry and research community in a number of ways by reaching out to students from underrepresented groups for the research projects, enhancing the quality of education by integrating the latest research developments into instructional activities of undergraduate and graduate curriculum, and making project results available widely.