| Presentation | 2014-09-11 Experimental Evaluation of Frame Collision Reduction Method for IEEE802.11 Wireless LAN System Akira Kishida, Masashi Iwabuchi, Toshiyuki Shintaku, Takeshi Onizawa, Tetsu Sakata, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The IEEE 802.11 distributed coordinated function (DCF) adopts carrier sense multiple access with collision avoidance (CSMA/CA) as its medium access control (MAC) protocol. CSMA/CA forces wireless local area network (WLAN) stations (STAs) to wait for the random backoff time prior to each frame transmission attempt. However, the more the number of competing STAs increases, the more the probability of the collision increases. Therefore, in congested situation by WLAN STAs, the performance of WLAN system is significantly degraded as the number of competing STAs increases. We have proposed a simple but effective method that enables to decrease collision probability. The proposed method refrains from consecutive transmission and waits for a certain period if previous transmission succeeded. This mechanism can lessen the number of competing STAs and reduce probability of frame collisions. At this point, the length of this waiting period affects the effect of collision reduction and the length of unnecessary overhead time. The effectiveness of the proposed method was measured through experiments. The system throughput characteristic against the length of waiting time and the number of STAs were verified. The experiments verified that the proposed method is able to obtain up to over 20% higher system throughput characteristic compared to the case in which the proposed method is not introduced when the number of stations in a network is 19. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IEEE802.11 / CSMA/CA / IFS / HEW / Wireless LAN / Dense / Frame Collision Reduction / Experiment |
| Paper # | CQ2014-42 |
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| Conference Information | |
| Committee | CQ |
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| Conference Date | 2014/9/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Communication Quality (CQ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Evaluation of Frame Collision Reduction Method for IEEE802.11 Wireless LAN System |
| Sub Title (in English) | |
| Keyword(1) | IEEE802.11 |
| Keyword(2) | CSMA/CA |
| Keyword(3) | IFS |
| Keyword(4) | HEW |
| Keyword(5) | Wireless LAN |
| Keyword(6) | Dense |
| Keyword(7) | Frame Collision Reduction |
| Keyword(8) | Experiment |
| 1st Author's Name | Akira Kishida |
| 1st Author's Affiliation | NTT Access Network Service Systems Laboratories, NTT Corporation() |
| 2nd Author's Name | Masashi Iwabuchi |
| 2nd Author's Affiliation | NTT Access Network Service Systems Laboratories, NTT Corporation |
| 3rd Author's Name | Toshiyuki Shintaku |
| 3rd Author's Affiliation | NTT Access Network Service Systems Laboratories, NTT Corporation |
| 4th Author's Name | Takeshi Onizawa |
| 4th Author's Affiliation | NTT Access Network Service Systems Laboratories, NTT Corporation |
| 5th Author's Name | Tetsu Sakata |
| 5th Author's Affiliation | NTT Access Network Service Systems Laboratories, NTT Corporation |
| Date | 2014-09-11 |
| Paper # | CQ2014-42 |
| Volume (vol) | vol.114 |
| Number (no) | 209 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |