NDLI: MoFA: Mobility-aware Frame Aggregation in Wi-Fi

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MoFA: Mobility-aware Frame Aggregation in Wi-Fi

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MoFA: Mobility-aware Frame Aggregation in Wi-Fi

Content Provider	ACM Digital Library
Author	Byeon, Seongho Oh, Seungseok Cho, Woonsun Yoon, Kangjin Lee, Okhwan Choi, Sunghyun
Abstract	IEEE 802.11n WLAN supports frame aggregation called aggregate MAC protocol data unit (A-MPDU) as a key MAC technology to achieve high throughput. While it has been generally accepted that aggregating more subframes results in higher throughput by reducing protocol overheads, our measurements reveal various situations where the use of long A-MPDU frames frequently leads to poor performance in time-varying environments. Especially, since mobility intensifies the time-varying nature of the wireless channel, the current method of channel estimation conducted only at the beginning of a frame reception is insufficient to ensure robust delivery of long A-MPDU frames. Based on extensive experiments, we develop MoFA, a standard-compliant mobility-aware A-MPDU length adaptation scheme with ease of implementation. Our prototype implementation in commercial 802.11n devices shows that MoFA achieves the throughput 1.8x higher than a fixed duration setting (i.e., 10 ms, the maximum frame duration according to IEEE 802.11n standard). To our best knowledge, this is the first effort to optimize the A-MPDU length for commercial 802.11n.
Starting Page	41
Ending Page	52
Page Count	12
File Format	PDF
ISBN	9781450332798
DOI	10.1145/2674005.2674995
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-12-02
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Channel estimation Frame aggregation Mobility Ieee 802.11 wireless local area network (wlan)
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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MoFA: Mobility-aware Frame Aggregation in Wi-Fi

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MoFA: Mobility-aware Frame Aggregation in Wi-Fi

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MoFA: Mobility-aware Frame Aggregation in Wi-Fi