NDLI: Potential pitfalls of the message in message mechanism in modern 802.11 networks

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Potential pitfalls of the message in message mechanism in modern 802.11 networks

Content Provider	ACM Digital Library
Author	Leong, Wai Kay Wang, Wei Leong, Ben
Abstract	We study the performance impact of the Message in Message (MIM) mechanism in modern 802.11 networks. The MIM mechanism refers to the capability of receiver to abandon an ongoing reception of an 802.11 MAC frame and shift to decode another frame with a higher signal strength. MIM is a common feature in modern 802.11 adapters and it has been shown to improve spatial concurrency. However, our measurement study in a campus WLAN shows that under certain conditions, MIM could cause a throughput degradation of more than 30% when enabled, instead of improving it as expected. With comprehensive experiments using commercial 802.11n adapters, we characterize the impact of MIM for a range of parameters and for different scenarios. We show that a simple adaptive MIM scheme can potentially achieve throughput that is close to the optimal. Our method is practical because it can be easily implemented in existing commodity 802.11 adapters.
Starting Page	41
Ending Page	48
Page Count	8
File Format	PDF
ISBN	9781450330725
DOI	10.1145/2643230.2643231
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-09-07
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	802.11n Message in message mechanism Frame aggregation
Content Type	Text
Resource Type	Article

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