Fluid-flow analysis of TCP Westwood with RED

Author

Chen, Jiwei ; Paganini, Fernando ; Wang, Ren ; Sanadidi, M.Y. ; Gerla, Mario

Author_Institution

California Univ., Los Angeles, CA, USA

Volume

7

fYear

2003

fDate

1-5 Dec. 2003

Firstpage

4064

Abstract

The paper concerns TCP Westwood, a recently-developed modification of TCP, in combination with RED queue management. We develop a fluid-flow model of the protocol, and use it to study both equilibrium and dynamic features. On the equilibrium side, we identify the scaling of the congestion window with loss-probability, and compare it to TCP NewReno. We also use the model to find the boundary of stability, beyond which we see large oscillations; we find that the stable region of TCP Westwood is enhanced with respect to TCP NewReno. Furthermore we show preliminary evidence that oscillations, when they occur, have a limited impact on network throughput.

Keywords

delay estimation; queueing theory; stability; telecommunication congestion control; transport protocols; RED queue management; TCP NewReno; TCP Westwood; bandwidth estimation; congestion window; fluid-flow analysis; loss-probability; network throughput; propagation delay estimation; queueing delay; random early detection; stability; Analytical models; Bandwidth; Delay estimation; Fluid dynamics; Mathematical model; Predictive models; Propagation losses; Protocols; Stability; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE

Print_ISBN

0-7803-7974-8

Type

conf

DOI

10.1109/GLOCOM.2003.1258992

Filename

1258992