Investigation of MPEG-4 Video Streaming over SCTP
Investigation of MPEG-4 Video Streaming over SCTP
复制标题
SCTP 上的 MPEG-4 视频流研究
作者：
Alex Balk;M. Sigler;M. Gerla;Song Chen
流控制传输协议(SCTP)是RFC 2960内部定义的一种新的传输层协议。它是由工业界和大学的研究人员开发的，重点是在基于IP的网络上传输电信信令信息。它是一个基于窗口的可靠协议，具有类似于tcp的拥塞控制机制，但它还具有几个新功能，使其非常适合流媒体内容。SCTP提供的新功能包括两个端点之间的内部和内部关联的多个流、在同一分组中捆绑在一起的数据和控制信息以及灵活的分组递送(不严格地按内部顺序)。在本文中，我们使用NS-22模拟来探索SCTP的新特性，并与现有的流媒体技术进行了性能比较。我们在NS-22内部实现了我们自己的NN应用程序，它是“SCTP感知”的，以便使用SCTP API来利用MPEG-44格式的编码特性，并试图提供更高质量的视频。我们表明，在典型的网络拓扑结构中，可以利用SCTP的几个特征S来将更多的MPEG44码流传输到接收器。我们的结论是，SCTP可以潜在地为流媒体视频应用提供显著的性能优势。并对今后CHH研究的方向进行了展望。1.引言人们普遍认为，在不久的将来，互联网将成为电影、电视、体育赛事的传播媒介，
The Stream Control Transmissionn Protocol (SCTP) is a new transport layer protocol definedd inn RFC 2960. It was developedd by researchers from industry andd universities withh the focus of transporting telecommunications signaling informationn over IP basedd networks. It is a window based, reliable protocol withh a congestionn control mechanism similar to TCP, but it also ha s several new features that make it well suitedd for streami ng media content. New features providedd by SCTP include multiple streams withinn ann associationn betweenn two endpoints, bundling of data andd control informationn together inn the same packet, andd flexible packet delivery (not strictly inn order). Inn this pape r we use NS-22 simulationn to explore the new features of SCTP andd compare the performance withh existing techniques for streaming media. We implement our ownn applicationn inn NS-22 that is " SCTP aware " inn order to use the SCTP API to take advantag e of encoding properties of the MPEG-44 format andd attempt to deliver better quality video. We show that inn a typical networkk topology, several feature s of SCTP cann be exploitedd to deliver more of the MPEG-44 bitstream to the receiver. We conclude that SCTP cann potentially provide a significant performance benefit to streaming video applications. Directions for future resear chh are also considered. 1. INTRODUCTION A widely heldd visionn of the Internet of the near future is as a medium of distributionn for film, television, sporting events,