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再反馈显式拥塞通告协议在TCP/IP层的设计

发表时间:2015-02-28  浏览量:2593  下载量:1105
全部作者: 张士菊
作者单位: 北京邮电大学网络与交换技术国家重点实验室
摘 要: 为缓解传统拥塞控制算法存在的问题,引入再反馈显式拥塞通告(re-feedback explicit congestion notification,Re-ECN)协议。Re-ECN协议使发送端在接收到接收端的显式拥塞反馈信息之后对网络拥塞量进行计数,并在IP层向网络中转达拥塞信息,实现网络拥塞的再反馈,使传输路径上的所有设备都能了解网络拥塞程度。研究明确了Re-ECN协议的工作原理,设计了在传输控制协议/互联网协议(transmission control protocol/internet protocol,TCP/IP)层Re-ECN协议的流程,重点关注能力协商和数据通信2个阶段,尤其是网络拥塞发生后作出响应的过程。通过对流程和设计的分析,总结出Re-ECN协议再反馈的特点,使网络传输路径上的设备都能了解网络拥塞程度,为网络拥塞控制和流量管理提出了新的实现方式。
关 键 词: 计算机网络;显式拥塞通告;再反馈;TCP半连接模式
Title: Design of re-feedback explicit congestion notification protocol on TCP/IP layer
Author: ZHANG Shiju
Organization: State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications
Abstract: In order to alleviate the problem in traditional congestion control algorithm, the re-feedback explicit congestion notification (Re-ECN) mechanism was introduced. Re-ECN protocol made the sender count the network congestion amount after the sender received the feedback of congestion from the receiver, and it transported the congestion information to the network center in IP layer. This operation implemented the re-feedback of network congestion, making all equipments along the transport path know the current congestion degree in the network. This paper introduced the background of the Re-ECN mechanism, and the design of Re-ECN protocol in transmission control protocol/internet protocol (TCP/IP) layers including Re-ECN capability negotiation and data communication stage, especially focusing the work done after the occurrence of the network congestion. Finally, this paper summarized the Re-ECN mechanism has the characteristic that can re-feedback of congestion by the transmission path, which provided new proposal in network congestion control and flow control.
Key words: computer network; explicit congestion notification; re-feedback; modes of TCP half-connection
发表期数: 2015年2月第4期
引用格式: 张士菊. 再反馈显式拥塞通告协议在TCP/IP层的设计[J]. 中国科技论文在线精品论文,2015,8(4):357-366.
 
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