Stability of TCP/RED systems in AQM routers

Author

Tan, Liansheng ; Zhang, Wei ; Peng, Gang ; Chen, Guanrong

Author_Institution

Comput. Sci. Dept., Central China Normal Univ., Wuhan

Volume

51

Issue

8

fYear

2006

Firstpage

1393

Lastpage

1398

Abstract

By applying the time-delay control theory to a TCP/RED dynamic model, this note establishes some explicit conditions under which the TCP/RED system is stable in terms of the average queue length. Then, the stability region is discussed. Finally, the results are illustrated by using ns2 simulations, which demonstrates that it is able to choose an appropriate control parameter max_p of RED based on the stability conditions derived in this note, to achieve satisfactory network performance. It is found, by comparison, that this improved performance is better than that of three other typical active queue management (AQM) schemes-the random exponential marking (REM), proportional-integral (PI) controller, and adaptive virtual queue (AVQ) schemes

Keywords

PI control; delay systems; stability; telecommunication congestion control; transport protocols; AQM routers; TCP/RED systems stability; active queue management schemes; adaptive virtual queue schemes; proportional-integral controller; random exponential marking; satisfactory network performance; time-delay control theory; Adaptive control; Control systems; Control theory; Delay; Internet; Programmable control; Proportional control; Queueing analysis; Stability analysis; Traffic control; Active queue management (AQM); random early detection (RED); stability; time-delay control;

fLanguage

English

Journal_Title

Automatic Control, IEEE Transactions on

Publisher

ieee

ISSN

0018-9286

Type

jour

DOI

10.1109/TAC.2006.876802

Filename

1673604