Two-degree-of-freedom congestion control strategy against time delay and disturbance

Hao Wang, Wei Wei, Yanhua Li, Chenda Liao, Yan Qiao, Zuohua Tian

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

15 Citations (Scopus)

Abstract

Most of the existing congestion control schemes cannot guarantee the quality of service in wide-area networks with large round trip time (RTT). Aiming at the above problem, a two-degree-of-freedom congestion control strategy (named TCC) is proposed for improving the stability and robustness of the TCP/AQM system. TCC employs a modified Smith predictor with two additional controllers to compensate for the RTT delay. The feedback controller is designed by the internal model control theory for fast set-point tracking. The disturbance rejection controller is derived from frequency-domain analysis to reject external disturbance. Simulation results in NS2 demonstrate that TCC can effectively overcome the negative influence cased by time delay and disturbance. Compared with other congestion control schemes, our proposed method is superior in stabilizing the queue length with small jitters and rejecting disturbances.

Original languageEnglish
Title of host publication2010 IEEE Global Telecommunications Conference, GLOBECOM 2010
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Print)9781424456383
DOIs
Publication statusPublished - 1 Dec 2010
Externally publishedYes
EventIEEE Global Telecommunications Conference 2010 - Miami, United States of America
Duration: 6 Dec 201010 Dec 2010
Conference number: 53
https://ieeexplore.ieee.org/xpl/conhome/5682081/proceeding (Proceedings)

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Conference

ConferenceIEEE Global Telecommunications Conference 2010
Abbreviated titleIEEE GLOBECOM 2010
Country/TerritoryUnited States of America
CityMiami
Period6/12/1010/12/10
Internet address

Keywords

  • Active queue management
  • Congestion control
  • Internal mode control
  • Smith predictor
  • Time delay
  • Two-degree-of-freedom

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