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 (9): 833-836.DOI: -

• 论著 • 上一篇    下一篇

基于代理缓存的VOD系统的节目综合调度

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:2004-09-15 发布日期:2013-06-25
  • 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)

Video-integrated scheduling for proxy-assisted VOD

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

  1. (1) Qinhuangdao Branch, Northeastern Univ., Qinhuangdao 066004, China; (2) Inst. of Elec. Eng., Yanshan Univ., Qinhuangdao 066004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-09-15 Published:2013-06-25
  • Contact: Hu, Y.-Q.
  • About author:-
  • Supported by:
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摘要： 研究了视频点播服务器的节目调度及代理缓存问题·在基于代理的分布式VOD系统中分析了现有的节目调度方案,主要有适用于一般流行节目的用户拉方案和适用于流行节目的服务器推方案·为了提高带宽资源的利用率,以直观的系统带宽资源消耗为性能指标,研究了流行节目的划分问题,并根据不同节目调度方案适用于不同流行度节目的特征,提出了信道综合调度方案及一种最优代理缓存算法·性能分析表明,信道综合调度方案和最优代理缓存算法,极大地缓解了系统带宽瓶颈问题·

关键词: 视频点播, 节目调度, 代理缓存, 节目流行度, 传输开销

Abstract: Video scheduling and proxy caching were investigated for proxy-assisted VOD (video-on-demand). The existing scheduling schemes were analyzed in a distributive proxy-based VOD system including mainly the client-pull and server-push schemes. In order to improve the utilization rate of bandwidth resources efficiently, a clear distinction between popular and unpopular videos was made taking the visual consumption of system's bandwidth resource as a performance index. A video-integrated scheduling scheme was proposed to configure client-pull and server-push scheduling schemes differing unpopular from popular videos. In addition, an optimal proxy caching algorithm was also proposed in combination with the video-integrated scheduling scheme, thus resulting in an efficient utilization of bandwidth resources. A performance evaluation showed that both algorithms can widen greatly the bandwidth bottleneck.

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