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IEEE 802.11b MAC layer's influence on VoIP quality parameters: Measurements and Analysis
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT. (CCSlab)
2004 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Real-time voice measurements were performed to assess whether there are significant problems with 802.11b wireless networks regarding real-time voice communication. We present an analysis of how the 802.11b MAC protocol and diverse environmental conditions affect the quality of real-time voice in terms of loss, delay, and jitter. We also reveal practical issues of wireless monitoring with passive sniffers for this type of analysis. The results obtained in our measurements show that in the majority of the experiments the quality was good, but under some circumstances the requirements for an acceptable voice communication were not met.

Abstract [sv]

Realtidsröstmätningar gjordes för att testa om det finns problem med 802.11b trådlösa nätverk beträffande realtidsröstkommunikation. En analys presenteras av hur 802.11b MACs protokoll och olika tillstånd i omgivningen påverkar kvaliteten på realtidsrösten i form av förluster, fördröjningar och jitter. Även praktiska angelägenheter om trådlös övervakning med passiva sniffers visas. De erhållna resultaten visar att i en majoritet av fallen var kvaliteten acceptabel, men under vissa förhållanden blev inte kraven för röstkommunikation uppfyllda.

Place, publisher, year, edition, pages
2004. , 55 p.
Trita-IMIT-LCN. AVH, ISSN 1651-4106 ; IMIT/LCN 2004-09
Keyword [en]
wireless local area networks, IEEE 802.11b, VoIP, voice quality, Quality of Service (QoS), loss, delay, jitter, MAC performance, wireless monitoring
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-92577OAI: diva2:513838
2004-10-15, Seminar room Grimeton, Isafjordsgatan 30B, Kista, 10:00 (English)
Available from: 2012-10-31 Created: 2012-04-03 Last updated: 2013-09-09Bibliographically approved

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Martín Severiano, Juan Carlos
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