Towards MIMO-Aware 802.11n Rate Adaptation
- Authors
- Pefkianakis, Ioannis; Lee, Suk-Bok; Lu, Songwu
- Issue Date
- Jun-2013
- Publisher
- Institute of Electrical and Electronics Engineers
- Keywords
- IEEE 80211n; multiple-input-multiple-output (MIMO); rate adaptation
- Citation
- IEEE/ACM Transactions on Networking, v.21, no.3, pp 692 - 705
- Pages
- 14
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- IEEE/ACM Transactions on Networking
- Volume
- 21
- Number
- 3
- Start Page
- 692
- End Page
- 705
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/27634
- DOI
- 10.1109/TNET.2012.2207908
- ISSN
- 1063-6692
1558-2566
- Abstract
- In this paper, we use real experiments to study multiple-input-multiple-output (MIMO) 802.11n rate adaptation (RA) on a programmable access point (AP) platform. Our case study shows that existing RA solutions offer much lower throughput than even a fixed-rate scheme. It is proven that all such algorithms are MIMO-mode oblivious; they do not differentiate spatial diversity and spatial multiplexing modes. We first design MiRA, a novel MIMO RA scheme that zigzags between intra-and inter-MIMO modes to address MIMO 802.11n dynamics. Second, we examine a window-based RA solution, which runs an independent RA in each MIMO mode in parallel and a signal-to-noise ratio (SNR)-based MIMO RA that differentiates modes using SNR measurements. Our experiments show that MIMO-mode aware designs outper-form MIMO-mode oblivious RAs in various settings, with goodput gains up to 73.5% in field trials.
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