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
Les interférences dans les WLAN ad hoc sont courantes car il n'existe aucun point d'accès centralisé contrôlant l'accès des appareils au canal sans fil. Les WLAN IEEE 802.11 utilisent l'accès multiple à détection de porteuse avec évitement de collision (CSMA/CA) qui lance le mécanisme d'établissement de liaison de demande d'envoi/d'autorisation d'envoi (RTS/CTS) pour résoudre le problème de nœud caché. Tout en résolvant le problème des nœuds cachés, RTS/CTS déclenche le problème des nœuds exposés. Dans cet article, nous présentons une évaluation d'une méthode de réduction des nœuds exposés dans les WLAN ad hoc 802.11. En utilisant des plages de transmission asymétriques pour les trames RTS et CTS, une conception multicouche est implémentée entre les couches 2 et 3 du modèle OSI. Les informations obtenues par le protocole de routage AODV sont utilisées pour ajuster la plage de transmission RTS au niveau de la couche MAC. La méthode proposée est évaluée avec le simulateur NS-2 et nous observons une amélioration significative du débit et confirmons l'efficacité de la méthode proposée. En particulier lorsque les nœuds mobiles sont distribués de manière aléatoire, le gain de débit de la méthode RTS/CTS asymétrique peut atteindre 30 % par rapport à la méthode RTS/CTS standard.
Emilia WEYULU
Tokyo University of Information Sciences
Masaki HANADA
Tokyo University of Information Sciences
Hidehiro KANEMITSU
Tokyo University of Technology
Eun-Chan PARK
Dongguk University
Moo Wan KIM
Tokyo University of Information Sciences
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Emilia WEYULU, Masaki HANADA, Hidehiro KANEMITSU, Eun-Chan PARK, Moo Wan KIM, "Cross-Layer Design for Exposed Node Reduction in Ad Hoc WLANs" in IEICE TRANSACTIONS on Communications,
vol. E101-B, no. 7, pp. 1575-1588, July 2018, doi: 10.1587/transcom.2017CQP0015.
Abstract: Interference in ad hoc WLANs is a common occurrence as there is no centralized access point controlling device access to the wireless channel. IEEE 802.11 WLANs use carrier sense multiple access with collision avoidance (CSMA/CA) which initiates the Request to Send/Clear to Send (RTS/CTS) handshaking mechanism to solve the hidden node problem. While it solves the hidden node problem, RTS/CTS triggers the exposed node problem. In this paper, we present an evaluation of a method for reducing exposed nodes in 802.11 ad hoc WLANs. Using asymmetric transmission ranges for RTS and CTS frames, a cross-layer design is implemented between Layer 2 and 3 of the OSI model. Information obtained by the AODV routing protocol is utilized in adjusting the RTS transmission range at the MAC Layer. The proposed method is evaluated with the NS-2 simulator and we observe significant throughput improvement, and confirm the effectiveness of the proposed method. Especially when the mobile nodes are randomly distributed, the throughput gain of the Asymmetric RTS/CTS method is up to 30% over the Standard RTS/CTS method.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2017CQP0015/_p
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@ARTICLE{e101-b_7_1575,
author={Emilia WEYULU, Masaki HANADA, Hidehiro KANEMITSU, Eun-Chan PARK, Moo Wan KIM, },
journal={IEICE TRANSACTIONS on Communications},
title={Cross-Layer Design for Exposed Node Reduction in Ad Hoc WLANs},
year={2018},
volume={E101-B},
number={7},
pages={1575-1588},
abstract={Interference in ad hoc WLANs is a common occurrence as there is no centralized access point controlling device access to the wireless channel. IEEE 802.11 WLANs use carrier sense multiple access with collision avoidance (CSMA/CA) which initiates the Request to Send/Clear to Send (RTS/CTS) handshaking mechanism to solve the hidden node problem. While it solves the hidden node problem, RTS/CTS triggers the exposed node problem. In this paper, we present an evaluation of a method for reducing exposed nodes in 802.11 ad hoc WLANs. Using asymmetric transmission ranges for RTS and CTS frames, a cross-layer design is implemented between Layer 2 and 3 of the OSI model. Information obtained by the AODV routing protocol is utilized in adjusting the RTS transmission range at the MAC Layer. The proposed method is evaluated with the NS-2 simulator and we observe significant throughput improvement, and confirm the effectiveness of the proposed method. Especially when the mobile nodes are randomly distributed, the throughput gain of the Asymmetric RTS/CTS method is up to 30% over the Standard RTS/CTS method.},
keywords={},
doi={10.1587/transcom.2017CQP0015},
ISSN={1745-1345},
month={July},}
Copier
TY - JOUR
TI - Cross-Layer Design for Exposed Node Reduction in Ad Hoc WLANs
T2 - IEICE TRANSACTIONS on Communications
SP - 1575
EP - 1588
AU - Emilia WEYULU
AU - Masaki HANADA
AU - Hidehiro KANEMITSU
AU - Eun-Chan PARK
AU - Moo Wan KIM
PY - 2018
DO - 10.1587/transcom.2017CQP0015
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E101-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2018
AB - Interference in ad hoc WLANs is a common occurrence as there is no centralized access point controlling device access to the wireless channel. IEEE 802.11 WLANs use carrier sense multiple access with collision avoidance (CSMA/CA) which initiates the Request to Send/Clear to Send (RTS/CTS) handshaking mechanism to solve the hidden node problem. While it solves the hidden node problem, RTS/CTS triggers the exposed node problem. In this paper, we present an evaluation of a method for reducing exposed nodes in 802.11 ad hoc WLANs. Using asymmetric transmission ranges for RTS and CTS frames, a cross-layer design is implemented between Layer 2 and 3 of the OSI model. Information obtained by the AODV routing protocol is utilized in adjusting the RTS transmission range at the MAC Layer. The proposed method is evaluated with the NS-2 simulator and we observe significant throughput improvement, and confirm the effectiveness of the proposed method. Especially when the mobile nodes are randomly distributed, the throughput gain of the Asymmetric RTS/CTS method is up to 30% over the Standard RTS/CTS method.
ER -