上海交通大学学报(自然版)

• 自动化技术、计算机技术 • 上一篇    下一篇

互联网拥塞控制时滞对偶改进模型及其分 岔 与 非 线 性 稳 定 性 研 究

刘玉良1,2,朱杰2   

  1. (1.浙江海洋学院 机电工程学院, 浙江 舟山 316004; 2.上海交通大学 电子信息与电气工程学院, 上海 200240)摘要: 基于霍普夫分岔理论,从增强稳定性的角度出发,提出了一种时滞对偶拥塞控制的改进模型.以通信时滞为分岔参数,研究了改进模型的分岔条件、分岔方向以及分岔周期解的稳定性等动力学特征,揭示了通信时滞影响系统稳定性的物理机制.研究表明,时滞对偶改进模型的非线性稳定性可以定量描述;改进模型能对模型的稳定性进行定量描述,为设计时滞对偶拥塞控制新协议或新算法提供了必要的理论依据.关键词: 霍普夫分岔; 非线性稳定性; 摄动法; 时滞对偶
  • 收稿日期:2009-08-17 修回日期:1900-01-01 出版日期:2010-07-28 发布日期:2010-07-28

Research on Bifurcation and Nonlinear Stability of an Improved TimeDelayed Dual Model in Internet Congestion Control

LIU Yuliang1,2,ZHU Jie2   

  1. (1. School of Electromechanical Engineering, Zhejiang Ocean University, Zhoushan 316004, China;2. School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2009-08-17 Revised:1900-01-01 Online:2010-07-28 Published:2010-07-28

摘要: 基于霍普夫分岔理论,从增强稳定性的角度出发,提出了一种时滞对偶拥塞控制的改进模型.以通信时滞为分岔参数,研究了改进模型的分岔条件、分岔方向以及分岔周期解的稳定性等动力学特征,揭示了通信时滞影响系统稳定性的物理机制.研究表明,时滞对偶改进模型的非线性稳定性可以定量描述;改进模型能对模型的稳定性进行定量描述,为设计时滞对偶拥塞控制新协议或新算法提供了必要的理论依据.

关键词: 霍普夫分岔, 非线性稳定性, 摄动法, 时滞对偶

Abstract: Based on Hopf bifurcation theory, an improved timedelayed dual model was proposed in Internet congestion control in order to make the stable domain enlarged. The modified model’s dynamic characteristics such as bifurcation condition, bifurcation direction and bifurcation periodic solution are all derived as the communication delay changes. The study shows that the novel model’s nonlinear stability can be described mathematically by three expressions. This paper’s creativity lies in the model’s improvement and its stability’s quantitative description, and it gives the necessary theoretical foundation on designing effective Internet congestion control protocols or algorithms.

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