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Efficient backward compatible allocation mechanism for multi-user CSMA/CA schemes

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3 Author(s)
Kamoun, M. ; Lab. des Syst. Communicants, CEA LIST, Gif-sur-Yvette, France ; Mazet, L. ; Gault, S.

With the increase of the number of Wireless Local Area Network devices (laptop PC, PDA, cellphones and set-top boxes) multi-user communication get a great interest for future versions of IEEE 802.11 standard. However, current CSMA/CA WLAN protocols do not support multiple transmissions on the same time frequency resource. This hinders these systems from taking a potential increase of the available throughput in dense deployments. In this contribution we propose a new RTS/CTS mechanism destined for WLAN SDMA/OFDMA access. We provide a capacity based analytical framework to assess the performance of these PHY layer techniques from MAC perspective in a multi-user context. Taking into account the MAC overhead it is shown that SDMA provides a substantial gain for multi-user throughput.

Published in:

Communications and Networking, 2009. ComNet 2009. First International Conference on

Date of Conference:

3-6 Nov. 2009

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