东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (7): 661-664.DOI: -

• 论著 • 上一篇    下一篇

基于代理的视频点播系统中节目调度方案

胡玉琦;臧怀泉;高远   

  1. 东北大学秦皇岛分校;燕山大学电气工程学院;东北大学秦皇岛分校 河北秦皇岛　066004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-07-15 发布日期:2013-06-24
  • 通讯作者: Hu, Y.-Q.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(60273078);;科技部科技型中小企业技术创新基金资助项目(00C26211300507)·

Scheduling scheme for proxy-assisted video-on-demand

Hu, Yu-Qi (1); Zang, Huai-Quan (2); Gao, Yuan (1)   

  1. (1) Qinhuangdao Software Ctr., Northeastern Univ., Qinhuangdao 066004, China; (2) Inst. of Elec. Eng., Yanshan Univ., Qinhuangdao 066004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-07-15 Published:2013-06-24
  • Contact: Hu, Y.-Q.
  • About author:-
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摘要： 为了有效地利用视频服务器I/O及网络带宽资源,针对基于代理缓存的节目调度特征,提出一种客户多播补块的视频点播方案·某些客户在播放节目的同时,又作为服务器按一定策略为后续客户多播一部分节目数据,因此,在不增加客户I/O带宽的前提下,通过利用局域网络丰富的带宽资源,有效地节省了视频服务器及主干网的带宽资源,同时对客户请求提供即时服务·此外,本方案自适应于节目流行度,支持任意的客户点播频度,不因无限用户的点播请求而出现带宽瓶颈·仿真结果表明了其有效、可行·

关键词: 视频点播, 节目调度, 网络带宽, 多播, 传输开销

Abstract: To utilize network bandwidth efficiently, a video-scheduling scheme named CMP (client multicast patching) is proposed for distributed proxy-assisted video-on-demand. When an appointed client plays out a video, it is also acting as a server to transmit the patching segments via multicast for subsequent clients in local area network. The abundant resource of the network bandwidth can be utilized fully instead of remote server and backbone network bandwidth, without extra I/O bandwidth needed by the appointed client and with instantaneous services provided for client requests. The scheme is adaptive to video popularity and supports all client request rates without bandwidth bottleneck. A simulation shows that significant network resource can be saved by using the scheme.

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