Performance testing of rate adaptation algorithms in WLAN

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Faculty of Electronics, Communications and Automation | Master's thesis
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Authors

Date

2008

Department

Department of Communications and Networking
Tietoliikenne- ja tietoverkkotekniikan laitos

Major/Subject

Communications Engineering
Tietoliikennetekniikka

Mcode

S-72

Degree programme

Tietoliikennetekniikan tutkinto-ohjelma

Language

en

Pages

xi, 51, [11]

Series

Abstract

In this thesis we test the performance of Rate Adaptation mechanisms in 802.11 Wireless Local Area Networks. We consider three different Rate Adaptation Algorithms i.e. SampleRate, Onoe and AMRR (Adaptive Multi Rate Retry) available on Atheros Chipsets for which open source MadWiFi (Multi-band Atheros Driver for WiFi) drivers are available. The performance testing is carried out in a realistic wireless environment realized by using a wireless channel simulator and a set of wireless nodes working in ad-hoc mode. A set of wireless channels proposed by 802.11 Task Group are used. The channels can be configured to provide identical environment for testing the different algorithms. We measure the throughput of different traffic workloads over each algorithm to evaluate and compare how the three algorithms adapt the PHY data rates to the varying wireless channel conditions. The analysis of the test results helps in better understanding the Rate Adaptation mechanisms and the possible advantages and drawbacks of the different design approaches currently in practice.

Description

Supervisor

Jäntti, Riku; Prof.

Thesis advisor

Ruttik, Kalle; TkL

Keywords

WLAN, rate adaptation, wireless channels, 802.11, MadWiFi, ad-hoc networks

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https://urn.fi/urn:nbn:fi:tkk-012429

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[dipl] Sähkötekniikan korkeakoulu / ELEC