A simulation study of TCP performance in ATM networks with ABR and UBR services

Authors:
Hongqing Li;Kai-Yeung Siu;Hong-Yi Tzeng;Chinatsu Ikeda;Hiroshi Suzuki
Affiliations:
AT&T Bell Labs, Middletown, NJ;d’Arbeloff Laboratory for Information Systems and Technology, MIT, Cambridge, MA;AT&T Bell Labs, Holmdel, NJ;Network Research Lab, C&C Research Labs, NEC Corporation, Japan;Network Research Lab, C&C Research Labs, NEC Corporation, Japan
Venue:
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 3
Year:
1996

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Abstract

In this paper, we present a simulation study of TCP performance in ATM networks with available bit rate (ABR) service and unspecified bit rate (UBR) service with early packet discard (EPD) schemes. We focus our study in a LAN environment using some benchmark network configurations proposed in the ATM Forum. Our simulation results show the following: (1) With UBR service and EPD schemes, TCP suffers significant performance degradation in terms of fairness and requires relatively large swatch buffer even with a small number of active virtual connections over a LAN configuration, and (2) for the same set of network configurations and with ABR service using explicit rate feedback schemes, TCP achieves good performance in terms of fairness and link utilization, and requires relatively small switch buffer.