计算机工程 ›› 2012, Vol. 38 ›› Issue (22): 67-70.doi: 10.3969/j.issn.1000-3428.2012.22.016

• 网络与通信 • 上一篇    下一篇

基于QPID-AVQ的组播拥塞控制机制

康巧燕 1,王建峰 1,王 蓉 1,黄红蓓 2   

  1. (1. 空军工程大学电讯工程学院,西安 710077;2. 94628部队,上海 200433)
  • 收稿日期:2011-12-09 修回日期:2012-02-27 出版日期:2012-11-20 发布日期:2012-11-17
  • 作者简介:康巧燕(1980-),女,讲师、博士,主研方向:宽带网络技术;王建峰、王 蓉,讲师、硕士;黄红蓓,工程师
  • 基金项目:

    国家自然科学基金资助项目(61201209);陕西省自然科学基金资助项目(2009JQ8008);空军工程大学电院博士启动基金资助项目(KDYBSQDJJ1007);空军工程大学电院科研创新基金资助项目(DYCX1012)

Multicast Congestion Control Mechanism Based on QPID-AVQ

KANG Qiao-yan 1, WANG Jian-feng 1, WANG Rong 1, HUANG Hong-bei 2   

  1. (1. Institute of Telecommunication Engineering, Air Force Engineering University, Xi’an 710077, China; 2. 94628 Troops, Shanghai 200433, China)
  • Received:2011-12-09 Revised:2012-02-27 Online:2012-11-20 Published:2012-11-17

摘要: 针对现有多媒体组播拥塞控制协议的不足,提出基于QPID虚拟队列管理的组播拥塞控制机制QPID-MCC。QPID-MCC在瓶颈路由器中采用QPID-AVQ队列管理策略,结合显式拥塞指示(ECN),按照一定的概率标记新到分组。接收端依据标记概率计算期望的TCP友好速率。发送端依据接收端的反馈信息并结合多媒体的最小带宽需求调整发送速率。仿真结果表明,QPID-MCC具有平滑稳定的发送速率、较好的公平性和较快的拥塞响应速度,并能满足最小带宽要求,保证多媒体业务的服务质量。

关键词: 组播, 拥塞控制, 主动队列管理, QPID-AVQ算法, 显示拥塞指示, TCP友好速率

Abstract: To settle the problems existing in multimedia multicast congestion control protocols, a multicast congestion control mechanism based on QPID-AVQ is proposed, termed QPID-MCC. QPID-MCC introduces QPID-AVQ queue management strategy and Explicit Congestion Notification(ECN) technology in the bottleneck router, so that enables the router to mark the new arriving packets in accordance with a certain probability computed by QPID-AVQ algorithm. The receivers calculate the expected TCP-friendly rate based on marking probability, and the sender adjusts the sending rate according to the feedback information from the receiver and the minimum bandwidth requirements of multimedia services. Simulation results show that QPID-MCC has a smooth and stable sending rate, good fairness and fast response to congestion, and can ensure minimum bandwidth requirement of multimedia services.

Key words: multicast, congestion control, Active Queue Management(AQM), QPID-AVQ algorithm, E, xplicit Congestion Notification(ECN), TCP-friendly rate

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