一种嵌入式系统多媒体文件快速传输协议  

Fast Multimedia File Transport Protocol on Embedded System

作　　者：王海威[1,2] 倪宏[2] 朱明[1] 孙鹏[2] 朱小勇[2] 

机构地区：[1]中国科学技术大学中科院网络传播系统与控制重点实验室网络传播系统与控制安徽省重点实验室,安徽合肥230027 [2]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190

出　　处：《小型微型计算机系统》2011年第2期208-213,共6页Journal of Chinese Computer Systems

基　　金："十一五"国家科技支撑计划项目(2008BAH28B04)资助;发改委CNGI项目(CNGI-09-03-14)资助

摘　　要：随着嵌入式和多媒体压缩技术的发展,嵌入式终端在高清媒体领域扮演了愈来愈重要的角色.由于高清媒体的高带宽需求,多采用先下载后播放的方式,因此如何将大型多媒体文件通过网络快速传输到嵌入式终端上,成为一种迫切需求.在研究传统传输协议的基础上,立足于对嵌入式系统特点的分析,提出一种适用于嵌入式终端的大型多媒体文件传输协议EMFTP(Embedded Multimedia File Transfer Protocol,嵌入式媒体文件传输协议).该协议采用统一重传的差错恢复策略,并引入了基于带宽探测的改进的DAIMD速率控制算法.实验表明,与传统的UDT和FTP传输协议相比,EMFTP的数据传输速度更快,系统资源消耗更少.Along with the development of embedded and multimedia compression technology, embedded terminal plays a more and more important role in the high-definition media field. Due to the need of high bandwidth, high-definition media usually are down- loaded first before played. Therefore, it is imperative to transmit high definition media files to embedded multimedia terminals fast and effectively via network. Based on the analysis of traditional file transport protocols and the characteristic of embedded systems, this paper proposes a new file transport protocol - EMFTP （ Embedded Multimedia File Transfer Protocol ）. The EMFTP protocol uses a method of uniform retransmission as its error recovery strategy and adopts an improved rate control algorithm based on bandwidth probe. As the experimental result shows, comparing with UDT and FTP protocol implemented on embedded terminal, EMPTP can achieve a faster transfer rate and lower resource occupancy on embedded system.

关 键 词：EMFTP 文件传输协议 嵌入式终端 差错恢复 带宽探测 速率控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]