Publication No 29566

Author(s)

Aarstad, E.; Gijsen, B.; Foreest, N.; Jaussi, L.; Lorang, M.*; Nelissen, J.

Title

Experiments on TCP over UBR Performance in the EXPERT Testbed

Topics

Broadband Networks; Communication Control

Methods

Performance Evaluation; Measurement and Trials

Keywords

UBR; TCP/IP; PACKET DISCARDING; CONGESTION CONTROL; ATM

Abstract

The UBR service is intended for non-real-time applications that do not require guaranteed QoS commitments. With additional, relatively inexpensive control functions such as packet discard schemes, UBR could become a cost-effective alternative for the transmission of data traffic, offering a straightforward and flexible solution as opposed to nrt-VBR and GFR applying traffic contracts as well as ABR with its sophisticated and complex rate-control protocol. This paper presents the results obtained from a comprehensive set of experiments with TCP over UBR, comprising measurements taken on different protocol layers. The goal is to experimentally investigate the performance of UBR to carry TCP traffic, to evaluate the performance gain achievable by packet discard schemes and TCP parameter tuning, and in a final step, to relate the measurements to simulation results.

Year

1997

Reference entry

Aarstad, E.; Gijsen, B.; Foreest, N.; Jaussi, L.; Lorang, M.; Nelissen, J.
Experiments on TCP over UBR Performance in the EXPERT Testbed
Beiträge zum EXPERT ATM Traffic Symposium, Mykonos, September 1997

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