カネミツ ヒデヒロ
Hidehiro Kanemitsu
金光 永煥 所属 コンピュータサイエンス学部 コンピュータサイエンス学科 職種 専任講師 |
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言語種別 | 英語 |
発行・発表の年月 | 2018/07 |
形態種別 | 学術論文 |
査読 | 査読あり |
標題 | Cross-Layer Design for Exposed Node Reduction in Ad Hoc WLANS |
執筆形態 | 共著 |
掲載誌名 | IEICE Transactions on Communications |
掲載区分 | 国外 |
出版社・発行元 | IEICE |
巻・号・頁 | E101-B(7),pp.1575-1588 |
著者・共著者 | Emilia Weyulu, Masaki Hanada, Hidehiro Kanemitsu, Eun-Chan Park, Moo Wan Kim |
概要 | 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. |