流媒体分发体系结构演化和关键技术进展综述

研究流媒体分发体系结构的演化路线,介绍各种体系结构下流媒体分发的主要技术及发展方向.指出P2P-CDN混合式体系结构是未来流媒体分发的必然趋势.探讨拓扑一致性、NAT/防火墙、网络扰动和激励机制等P2P共性问题对流媒体分发的影响以及相关研究.重点阐述P2P体系结构下的网络拓扑、数据调度和数据编码等与流媒体业务特性密切相关的关键技术,总结P2P-CDN混合式体系结构的研究成果,归纳出一种简化的混合式模型.最后总结流媒体分发研究存在的问题并对进一步研究进行展望.

Survey on Architectural Evolution and Key Technologies of Streaming Media Distribution

Evolutionary routes of streaming media distribution architecture are studied in this paper, as well as the key technologies and developing directions under each given architectures. It is emphasized that P2P-CDN hybrid architecture will be an inevitable trend for future streaming media distribution. Influences of common limitations from P2P architecture, such as topology consistency, NAT/ firewall, peer churns and incentive mechanisms, towards streaming media delivery are discussed and related literatures are formula-ted. Then key technologies such as overlay topology, data scheduling and data coding, which are closely related to media streaming application characteristics are fully detailed. On concluding current fruits about P2P-CDN hybrid architectures, a simplified and gener-al hybrid delivery model is induced, Finally, several research issues within streaming media distribution area are summarized and fur-tlaer works are explored.