Sender-Side TCP Modifications: Performance Analysis and Design Guidelines

Authors:
R. Lo Cigno;G. Procissi;M. Gerla
Affiliations:
Dipartimento di Informatica e Telecomunicazioni, Universtà degli Studi di Trento, Povo, Italy 38050;Dipartimento di Ingegneria della Informazione, Università di Pisa, CNIT -- Consorzio Nazionale Inter-Universitario per le Telecomunicazioni, Pisa, Italy 56126;Computer Science Department, UCLA, Los Angeles 90095-1596
Venue:
Cluster Computing
Year:
2005

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Abstract

This paper considers a number of modifications that can be applied to the congestion control algorithm of a TCP sender without requiring the cooperation either of the network or of the receiver, analyzing their impact on the performance of the protocol. We use a theoretical approach based on the use of queueing networks for the description of the protocol dynamics and a fixed point approximation to derive the working point of the IP network. Our results show that in presence of short lived connections the impact of the transient behavior of TCP on the network performance is dominant, and major performance improvements can be obtained only if the transient behavior is improved.