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一种主动TCP拥塞控制方案


□ 何 利 鲜永菊

  (重庆邮电大学 计算机科学与技术学院, 重庆 400065)
  
  摘 要:
  基于广泛使用的TCP版本TCP Reno,提出了一种主动TCP拥塞控制方案,命名Active-TCP。在沿用传统的被动拥塞控制方式的同时,Active-TCP添加了主动拥塞控制方式,即在满足给定条件下,Active-TCP可主动降低拥塞窗口,而此时网络并未真正发生拥塞。仿真分析了Active-TCP性能,结果表明,与TCP Reno相比,使用Active-TCP可改善吞吐量,降低报文重传率;Active-TCP也能与TCP Reno友好共存,公平竞争网络资源。另外,Active-TCP可由TCP Reno发送方作较小修改得到,因此Active-TCP容易实现,所增加的额外开销较少。
  关键词:传输控制协议; 拥塞控制; 传输控制协议性能; 主动传输控制协议
  中图分类号:TP393.03 文献标志码:A
   文章编号:1001-3695(2009)02-686-04
  
  Active-TCP congestion control approach
  
  HE Li, XIAN Yong-ju
  (College of Computer Science & Technology, Chongqing University of Posts & Telecommunications, Chongqing 400065, China)
  
  Abstract:Based on TCP Reno, a widely used TCP version, proposed an active TCPcongestion control approachnamed Active-TCP. Besides the traditional passive congestion control manners, Active-TCP added an active congestion control manner, i.e., the congestion window may be decreased actively when some given conditions were satisfied before the congestion really occurs. Investigated Active-TCP performances through simulations. Comparing with TCP Reno, the throughput may be improved and the retransmit probabilitymay be decreased. Active-TCP can coexist with TCP Reno very friendly, and they can compete network resources fairly. In addition, Active-TCP may be obtained through a little modification fromTCP Reno at the sender side, so Active-TCP can be easily developed and the addition overheads are very low. ......
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