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    政大機構典藏 > 理學院 > 資訊科學系 > 期刊論文 >  Item 140.119/110583


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    題名: Leader-Contention-Based User Matching for 802.11 Multiuser MIMO Networks
    作者: 郭桐惟
    Kuo, Tung-Wei;Lee, Kuang-Che;Lin, Kate Ching-Ju;Tsai, Ming-Jer
    貢獻者: 資科系
    日期: 2014-04
    上傳時間: 2017-06-29 09:44:38 (UTC+8)
    摘要: In multiuser MIMO (MU-MIMO) LANs, the achievable throughput of a client depends on who is transmitting concurrently with it. Existing MU-MIMO MAC protocols, however, enable clients to use the traditional 802.11 contention to contend for concurrent transmission opportunities on the uplink. Such a contention-based protocol not only wastes lots of channel time on multiple rounds of contention but also fails to maximally deliver the gain of MU-MIMO because users randomly join concurrent transmissions without considering their channel characteristics. To address such inefficiency, this paper introduces MIMOMate, a leader-contention-based MU-MIMO MAC protocol that matches clients as concurrent transmitters according to their channel characteristics to maximally deliver the MU-MIMO gain while ensuring all users fairly share concurrent transmission opportunities. Furthermore, MIMOMate elects the leader of the matched users to contend for transmission opportunities using traditional 802.11 CSMA/CA. It hence requires only a single contention overhead for concurrent streams and can be compatible with legacy 802.11 devices. A prototype implementation in USRP N200 shows that MIMOMate achieves an average throughput gain of 1.42× and $1.52× over the traditional contention-based protocol for two- and three-antenna AP scenarios, respectively, and also provides fairness for clients.
    關聯: IEEE Transactions on Wireless Communications, 13(8), 4389-4400
    資料類型: article
    DOI: http://dx.doi.org/10.1109/TWC.2014.2320908
    顯示於類別:[資訊科學系] 期刊論文

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