Towards MIMO-Aware 802.11n Rate Adaptation
| Autor: | Suk-Bok Lee, Songwu Lu, Ioannis Pefkianakis |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Computer Networks and Communications
Computer science Goodput ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Real-time computing MIMO Throughput Data_CODINGANDINFORMATIONTHEORY Antenna diversity Multiplexing Computer Science Applications Spatial multiplexing Signal-to-noise ratio Computer engineering Algorithm design Electrical and Electronic Engineering Software Computer Science::Information Theory |
| Zdroj: | IEEE/ACM Transactions on Networking. 21:692-705 |
| ISSN: | 1558-2566 1063-6692 |
| DOI: | 10.1109/tnet.2012.2207908 |
| Popis: | 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 outperform MIMO-mode oblivious RAs in various settings, with goodput gains up to 73.5% in field trials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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