| Presentation | 2010-09-10 Improving Transmission Quality for IEEE 802.11e Wireless LAN Access Networks Oyunchimeg SHAGDAR, Kengo SAKAI, Hiroyuki YOMO, Akio HASEGAWA, Tetsuo UEDA, Ryu MIURA, Sadao OBANA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Widespread of wireless LAN enables users enjoy ubiquitous Internet access not only for the traditional best-effort type applications but also real-time applications such as voice. To support real timme applications in Wireless LAN, the IEEE 802.11e enhances the legacy 802.11 MAC protocol with service differentiation and it is now installed in off-the-shelf wireless LAN cards. However, because the channel access method of IEEE 802.11e, EDCA (Enhanced Distributed Channel Access), is based on the Distributed Coordination Function (DCF) of the legacy 802.11 MAC, it carries over the issues of the DCF, such as channel underutilization and uplink and downlink unfairness issues. In this paper, we target the latter issue, which is especially problematic for bidirectional applications such as voice, and propose a scheme that mitigates the unfairness problem by enabling AP adaptively adjust TXOP (Transmission Opportunity). The proposed scheme is investigated by simulations and testbed experiments. Our simulation results show that the proposed scheme provides fair communication performance for uplink and downlink traffic. The experimental results show that the proposed scheme can be implemented in the current hardware and network stack and can provide a promising system performance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | wireless LAN / IEEE 802.11e / unfairness problem / TXOP |
| Paper # | MoMuC2010-34 |
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| Committee | MoMuC |
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| Conference Date | 2010/9/2(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Mobile Multimedia Communications(MoMuC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improving Transmission Quality for IEEE 802.11e Wireless LAN Access Networks |
| Sub Title (in English) | |
| Keyword(1) | wireless LAN |
| Keyword(2) | IEEE 802.11e |
| Keyword(3) | unfairness problem |
| Keyword(4) | TXOP |
| 1st Author's Name | Oyunchimeg SHAGDAR |
| 1st Author's Affiliation | ATR Adaptive Communications Research Laboratories() |
| 2nd Author's Name | Kengo SAKAI |
| 2nd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 3rd Author's Name | Hiroyuki YOMO |
| 3rd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 4th Author's Name | Akio HASEGAWA |
| 4th Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 5th Author's Name | Tetsuo UEDA |
| 5th Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 6th Author's Name | Ryu MIURA |
| 6th Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 7th Author's Name | Sadao OBANA |
| 7th Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| Date | 2010-09-10 |
| Paper # | MoMuC2010-34 |
| Volume (vol) | vol.110 |
| Number (no) | 199 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |