The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Avec des transmissions multi-utilisateurs simultanées, l'accès multiple par répartition spatiale (SDMA) offre un gain de débit substantiel par rapport à la transmission à utilisateur unique. Cependant, sa mise en œuvre dans les WLAN avec MAC IEEE 802.11 basé sur les conflits reste un défi. Les problèmes tels que la coordination et la synchronisation de plusieurs utilisateurs doivent être résolus de manière distribuée. Dans cet article, nous proposons un protocole MAC distribué pour les WLAN avec prise en charge SDMA. Un mécanisme de réponse CTS bimode est conçu pour réaliser l'estimation de canal et la synchronisation utilisateur requises pour SDMA. Nous étudions analytiquement les performances de débit du MAC proposé, et l'ajustement dynamique des paramètres est conçu pour améliorer l'efficacité du protocole. De plus, le protocole MAC proposé ne repose pas sur des réalisations de couche physique spécifiques et peut fonctionner sur les équipements IEEE 802.11 existants avec de légères mises à jour logicielles. Les résultats de la simulation montrent que le MAC proposé surpasse considérablement la norme IEEE 802.11 et que l'ajustement dynamique des paramètres peut suivre efficacement la variation de charge dans le réseau.
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Sheng ZHOU, Zhisheng NIU, "Distributed Medium Access Control with SDMA Support for WLANs" in IEICE TRANSACTIONS on Communications,
vol. E93-B, no. 4, pp. 961-970, April 2010, doi: 10.1587/transcom.E93.B.961.
Abstract: With simultaneous multi-user transmissions, spatial division multiple access (SDMA) provides substantial throughput gain over the single user transmission. However, its implementation in WLANs with contention-based IEEE 802.11 MAC remains challenging. Problems such as coordinating and synchronizing the multiple users need to be solved in a distributed way. In this paper, we propose a distributed MAC protocol for WLANs with SDMA support. A dual-mode CTS responding mechanism is designed to accomplish the channel estimation and user synchronization required for SDMA. We analytically study the throughput performance of the proposed MAC, and dynamic parameter adjustment is designed to enhance the protocol efficiency. In addition, the proposed MAC protocol does not rely on specific physical layer realizations, and can work on legacy IEEE 802.11 equipment with slight software updates. Simulation results show that the proposed MAC outperforms IEEE 802.11 significantly, and that the dynamic parameter adjustment can effectively track the load variation in the network.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.961/_p
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@ARTICLE{e93-b_4_961,
author={Sheng ZHOU, Zhisheng NIU, },
journal={IEICE TRANSACTIONS on Communications},
title={Distributed Medium Access Control with SDMA Support for WLANs},
year={2010},
volume={E93-B},
number={4},
pages={961-970},
abstract={With simultaneous multi-user transmissions, spatial division multiple access (SDMA) provides substantial throughput gain over the single user transmission. However, its implementation in WLANs with contention-based IEEE 802.11 MAC remains challenging. Problems such as coordinating and synchronizing the multiple users need to be solved in a distributed way. In this paper, we propose a distributed MAC protocol for WLANs with SDMA support. A dual-mode CTS responding mechanism is designed to accomplish the channel estimation and user synchronization required for SDMA. We analytically study the throughput performance of the proposed MAC, and dynamic parameter adjustment is designed to enhance the protocol efficiency. In addition, the proposed MAC protocol does not rely on specific physical layer realizations, and can work on legacy IEEE 802.11 equipment with slight software updates. Simulation results show that the proposed MAC outperforms IEEE 802.11 significantly, and that the dynamic parameter adjustment can effectively track the load variation in the network.},
keywords={},
doi={10.1587/transcom.E93.B.961},
ISSN={1745-1345},
month={April},}
Copier
TY - JOUR
TI - Distributed Medium Access Control with SDMA Support for WLANs
T2 - IEICE TRANSACTIONS on Communications
SP - 961
EP - 970
AU - Sheng ZHOU
AU - Zhisheng NIU
PY - 2010
DO - 10.1587/transcom.E93.B.961
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2010
AB - With simultaneous multi-user transmissions, spatial division multiple access (SDMA) provides substantial throughput gain over the single user transmission. However, its implementation in WLANs with contention-based IEEE 802.11 MAC remains challenging. Problems such as coordinating and synchronizing the multiple users need to be solved in a distributed way. In this paper, we propose a distributed MAC protocol for WLANs with SDMA support. A dual-mode CTS responding mechanism is designed to accomplish the channel estimation and user synchronization required for SDMA. We analytically study the throughput performance of the proposed MAC, and dynamic parameter adjustment is designed to enhance the protocol efficiency. In addition, the proposed MAC protocol does not rely on specific physical layer realizations, and can work on legacy IEEE 802.11 equipment with slight software updates. Simulation results show that the proposed MAC outperforms IEEE 802.11 significantly, and that the dynamic parameter adjustment can effectively track the load variation in the network.
ER -