Rate adaptation for 802.11 multiuser MIMO networks

Wei Liang Shen*, Yu Chih Tung, Kuang Che Lee, Ching-Ju Lin, Shyamnath Gollakota, Dina Katabi, Ming Syan Chen

*Corresponding author for this work

研究成果: Conference contribution同行評審

63 引文 斯高帕斯(Scopus)

摘要

In multiuser MIMO (MU-MIMO) networks, the optimal bit rate of a user is highly dynamic and changes from one packet to the next. This breaks traditional bit rate adaptation algorithms, which rely on recent history to predict the best bit rate for the next packet. To address this problem, we introduce TurboRate, a rate adaptation scheme for MU-MIMO LANs. TurboRate shows that clients in a MU-MIMO LAN can adapt their bit rate on a per-packet basis if each client learns two variables: its SNR when it transmits alone to the access point, and the direction along which its signal is received at the AP. TurboRate also shows that each client can compute these two variables passively without exchanging control frames with the access point. A TurboRate client then annotates its packets with these variables to enable other clients to pick the optimal bit rate and transmit concurrently to the AP. A prototype implementation in USRP-N200 shows that traditional rate adaptation does not deliver the gains of MU-MIMO WLANs, and can interact negatively with MU-MIMO, leading to low throughput. In contrast, enabling MUMIMO with TurboRate provides a mean throughput gain of 1.7x and 2.3x, for 2-antenna and 3-antenna APs respectively.

原文English
主出版物標題MobiCom'12 - Proceedings of the 18th Annual International Conference on Mobile Computing and Networking
頁面29-39
頁數11
DOIs
出版狀態Published - 28 九月 2012
事件18th Annual International Conference on Mobile Computing and Networking, MobiCom 2012 - Istanbul, Turkey
持續時間: 22 八月 201226 八月 2012

出版系列

名字Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM

Conference

Conference18th Annual International Conference on Mobile Computing and Networking, MobiCom 2012
國家Turkey
城市Istanbul
期間22/08/1226/08/12

指紋 深入研究「Rate adaptation for 802.11 multiuser MIMO networks」主題。共同形成了獨特的指紋。

引用此