计算机工程 ›› 2009, Vol. 35 ›› Issue (23): 50-52.doi: 10.3969/j.issn.1000-3428.2009.23.018

• 软件技术与数据库 • 上一篇    下一篇

基于缓存偏移量的P2P流媒体调度策略

王文波,范训礼,房鼎益   

  1. (西北大学信息科学与技术学院,西安 710127)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-12-05 发布日期:2009-12-05

Scheduling Strategy Based on Cache Offset for P2P Streaming Media

WANG Wen-bo, FAN Xun-li, FANG Ding-yi   

  1. (School of Information Science and Technology, Northwest University, Xi’an 710127)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-12-05 Published:2009-12-05

摘要: 现有P2P流媒体调度策略在确定数据块调度优先级时,未能综合考虑数据块稀缺度和紧迫度因素,导致了较差的播放连续度和启动延迟性能。提出的基于缓存偏移量的数据调度策略通过统计数据块在供求节点上的播放偏移量并对其加以处理,可有效解决该问题,使播放连续度、启动延迟性能得到明显提高。

关键词: P2P流媒体, 数据调度, 稀缺度, 紧迫度, 缓存偏移量

Abstract: The rarity and urgency of data block cannot be concerned simultaneously when the popularity of data block is calculated in the existing P2P scheduling strategies, which leads to the inferior playback continuity and startup latency. This paper proposes a Scheduling Strategy based on Cache Offset(SSCO) strategy, the above-mentioned problem has been solved well by means of counting and processing the information about the Cache Offset(CO) of playback of quested data block and the two metrics have been improved noticeably.

Key words: P2P streaming media, data scheduling, rarity, urgency, Cache Offset(CO)

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