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タイトル: Virtual continuous CWmin control scheme of WLAN
著者: SANGENYA, Yuki
INOUE, Fumihiro
MORIKURA, Masahiro  KAKEN_id  orcid https://orcid.org/0000-0002-3634-1320 (unconfirmed)
YAMAMOTO, Koji  KAKEN_id  orcid https://orcid.org/0000-0003-4106-3983 (unconfirmed)
NUNO, Fusao
SUGIYAMA, Takatoshi
キーワード: CSMA/CA
IEEE 802.11 DCF
CWmin control
fairness
performance analysis model
発行日: Jan-2014
出版者: Institute of Electronics, Information and Communication Engineers(IEICE)
誌名: IEICE Transactions on fundamentals of electronics, communications and computer sciences
巻: E97-A
号: 1
開始ページ: 40
終了ページ: 48
抄録: In this paper, a priority control problem between uplink and downlink flows in IEEE 802.11 wireless LANs is considered. The minimum contention window size (CWmin) has a nonnegative integer value. CWmin control scheme is one of the solutions for priority control to achieve the fairness between links. However, it has the problem that CWmin control scheme cannot achieve precise priority control when the CWmin values become small. As the solution of this problem, this paper proposes a new CWmin control method called a virtual continuous CWmin control (VCCC) scheme. The key concept of this method is that it involves the use of small and large CWmin values probabilistically. The proposed scheme realizes the expected value of CWmin as a nonnegative real number and solves the precise priority control problem. Moreover, we proposed a theoretical analysis model for the proposed VCCC scheme. Computer simulation results show that the proposed scheme improves the throughput performance and achieves fairness between the uplink and the downlink flows in an infrastructure mode of the IEEE 802.11 based wireless LAN. Throughput of the proposed scheme is 31% higher than that of a conventional scheme when the number of wireless stations is 18. The difference between the theoretical analysis results and computer simulation results of the throughput is within 1% when the number of STAs is less than 10.
著作権等: © 2014 The Institute of Electronics, Information and Communication Engineers
URI: http://hdl.handle.net/2433/193079
DOI(出版社版): 10.1587/transfun.E97.A.40
出現コレクション:学術雑誌掲載論文等

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