Abstract
ULg Research Unit in Networking RUN
Abstract


A simulation study of TCP with the proposed GFR service category

O. Bonaventure1

1 Research unit in Networking, EECS department, University of Liège, Belgium

(1997)

Abstract

Recently, the GFR service category has been proposed to provide bandwidth guarantees and with a simpler implementation than ABR in ATM networks. In this report, we study the performance of TCP in a LAN and WAN ATM networks supporting the GFR service category with the proposed FIFO-based and WFQ-based switch implementations. Our simulations show that with the FIFO-based implementation for the GFR service category, TCP is unable to benefit from the bandwidth guarantees. With the proposed WFQ-based implementation, the performance of TCP is good when no losses occur, but it becomes quickly degraded if tagging is used inside the network.

Keywords

Asynchronous Tranfer Mode (ATM), simulations, TCP Guaranteed Frame Rate (GFR)

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