Latency of TCP applications over the ATM-WAN using the GFR service category

Kuo-Hsien Chen; John F. Siliquini; Zigmantas Budrikis

doi:10.1117/12.325883

7 October 1998 Latency of TCP applications over the ATM-WAN using the GFR service category

Kuo-Hsien Chen, John F. Siliquini, Zigmantas Budrikis

Proceedings Volume 3530, Performance and Control of Network Systems II; (1998) https://doi.org/10.1117/12.325883
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

The GFR service category has been proposed for data services in ATM networks. Since users are ultimately interested in data service that provide high efficiency and low latency, it is important to study the latency performance for data traffic of the GFR service category in an ATM network. Today much of the data traffic utilizes the TCP/IP protocol suite and in this paper we study through simulation the latency of TCP applications running over a wide-area ATM network utilizing the GFR service category using a realistic TCP traffic model. From this study, we find that during congestion periods the reserved bandwidth in GFR can improve the latency performance for TCP applications. However, due to TCP 'Slow Start' data segment generation dynamics, we show that a large proportion of TCP segments are discarded under network congestion even when the reserved bandwidth is equal to the average generated rate of user data. Therefore, a user experiences worse than expected latency performance when the network is congested. In this study we also examine the effects of segment size on the latency performance of TCP applications using the GFR service category.

Citation Download Citation

Kuo-Hsien Chen, John F. Siliquini, and Zigmantas Budrikis "Latency of TCP applications over the ATM-WAN using the GFR service category", Proc. SPIE 3530, Performance and Control of Network Systems II, (7 October 1998); https://doi.org/10.1117/12.325883

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