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Paper Abstract and Keywords
Presentation 2015-07-30 10:30
[Poster Presentation] Adaptive Initial Contention Window Control Scheme for Dense IEEE 802.11 Wireless LANs
Ryohei Ito, Daiki Nobayashi, Takeshi Ikenaga (KIT)
Abstract (in Japanese) (See Japanese page) 
(in English) Portable information devices with a wireless LAN interface, such as smartphones and tablet computers, have been spreading rapidly.Therefore, high density of stations instigate severe degradation of area throughput in wireless LANs.One factor is that an initial value of minimum contention windows size (CWmin) in existent Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is small for the number of stations. Because smaller CWmin is not appropriate for high-density station, frame collisions attempt for sending of a frame and communication performance per a station decrease.In this paper, we assume that many stations are connected to a single access point (AP) and propose the media access control method for high-density station. In our proposed method, an AP measures channel utilization and the number of stations that are transmitting a frame to the AP at the time periodically.The AP switches a value of CWmin based on these parameters, and the AP informs value of new CWmin to stations using a beacon. We performed computer simulations in order to verify the performance of our scheme.The results show us that our proposed method outperforms the conventional CSMA/CA over wireless LAN in high-density station in terms of throughput.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless LAN / Media Access Control / CSMA/CA / Contention Window / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 159, NS2015-40, pp. 19-24, July 2015.
Paper # NS2015-40 
Date of Issue 2015-07-22 (RCC, RCS, SR, ASN), 2015-07-23 (NS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee RCC ASN RCS NS SR  
Conference Date 2015-07-29 - 2015-07-31 
Place (in Japanese) (See Japanese page) 
Place (in English) JA Naganoken Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Distributed Network, M2M: Machine-to-Machine, D2D (Device-to-Device),etc. 
Paper Information
Registration To NS 
Conference Code 2015-07-RCC-ASN-RCS-NS-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Adaptive Initial Contention Window Control Scheme for Dense IEEE 802.11 Wireless LANs 
Sub Title (in English)  
Keyword(1) Wireless LAN  
Keyword(2) Media Access Control  
Keyword(3) CSMA/CA  
Keyword(4) Contention Window  
1st Author's Name Ryohei Ito  
1st Author's Affiliation Kyushu Institute of Technology (KIT)
2nd Author's Name Daiki Nobayashi  
2nd Author's Affiliation Kyushu Institute of Technology (KIT)
3rd Author's Name Takeshi Ikenaga  
3rd Author's Affiliation Kyushu Institute of Technology (KIT)
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Date Time 2015-07-30 10:30:00 
Presentation Time 90 
Registration for NS 
Paper # IEICE-RCC2015-20,IEICE-NS2015-40,IEICE-RCS2015-103,IEICE-SR2015-21,IEICE-ASN2015-30 
Volume (vol) IEICE-115 
Number (no) no.158(RCC), no.159(NS), no.160(RCS), no.161(SR), no.162(ASN) 
Page pp.15-20(RCC), pp.19-24(NS), pp.17-22(RCS), pp.33-38(SR), pp.55-60(ASN) 
#Pages IEICE-6 
Date of Issue IEICE-RCC-2015-07-22,IEICE-NS-2015-07-23,IEICE-RCS-2015-07-22,IEICE-SR-2015-07-22,IEICE-ASN-2015-07-22 

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