Design of TCP traffic controllers for AQM routers based on phase margin specification

Author

Hong, Yang ; Yang, Oliver W W

Author_Institution

Sch. of Inf. Technol. & Eng., Ottawa Univ., Ont., Canada

fYear

2004

fDate

2004

Firstpage

314

Lastpage

318

Abstract

We propose proportional and proportional-integral (PI) controllers for active queue management (AQM) in the Internet. Classical control theory is applied in the design to meet the frequency domain specification - phase margin. The user can specify the phase margin to achieve good performance of AQM. The PI controller can regulate the source window size based on the knowledge of the queue size to clamp the steady state value of queue size to the specified reference queue size. Our controllers are verified by OPNET simulation and our PI controller is shown to outperform RED significantly.

Keywords

IP networks; Internet; PI control; proportional control; queueing theory; telecommunication congestion control; telecommunication network routing; telecommunication traffic; transport protocols; AQM routers; IP network congestion control; Internet; PI controllers; RED; TCP traffic controllers; active queue management; control theory; frequency domain specification; phase margin; proportional controllers; proportional-integral controllers; Bandwidth; Control systems; Frequency domain analysis; IP networks; Internet; Proportional control; Robust stability; Steady-state; TCPIP; Traffic control;

fLanguage

English

Publisher

ieee

Conference_Titel

High Performance Switching and Routing, 2004. HPSR. 2004 Workshop on

Print_ISBN

0-7803-8375-3

Type

conf

DOI

10.1109/HPSR.2004.1303498

Filename

1303498