NDLI: 802.11n under the microscope

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802.11n under the microscope

Content Provider	ACM Digital Library
Author	Shrivastava, Vivek Banerjee, Suman Yoonj, Jongwoon Rayanchu, Shravan
Abstract	We present an experimental study of IEEE 802.11n (high throughput extension to the 802.11 standard) using commodity wireless hardware. 802.11n introduces a variety of new mechanisms including physical layer diversity techniques, channel bonding and frame aggregation mechanisms. Using measurements from our testbed, we analyze the fundamental characteristics of 802.11n links and quantify the gains of each mechanism under diverse scenarios. We show that the throughput of an 802.11n link can be severely degraded (up ≈85%) in presence of an 802.11g link. Our results also indicate that increased amount of interference due to wider channel bandwidths can lead to throughput degradation. To this end, we characterize the nature of interference due to variable channel widths in 802.11n and show that careful modeling of interference is imperative in such scenarios. Further, as a reappraisal of previous work, we evaluate the effectiveness of MAC level diversity in the presence of physical layer diversity mechanisms introduced by 802.11n.
Starting Page	105
Ending Page	110
Page Count	6
File Format	PDF
ISBN	9781605583341
DOI	10.1145/1452520.1452533
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2008-10-20
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Wireless 802.11n Phy diversity Frame aggregation Mimo Mac diversity Performance Channel bonding
Content Type	Text
Resource Type	Article

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