| Presentation | 2007-01-25 Throughput Evaluation of CSMA/CA Assuming Carrier Detection Probability in Wireless Ad Hoc Networks Masahiro FUJII, Koji YAMAMOTO, Hidekazu MURATA, Susumu YOSHIDA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In usual performance evaluations of Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA), probabilities of carrier detection and data reception are modeled to be a discontinuous function changing from 0% to 100% at a certain transmitter-receiver distance. In real systems, however, these probabilities change continuously against the receiver-transmitter distance even with the same average received CNR (Carrier-to-Noise Ratio) or CINR (Carrier-to-Interference plus Noise Ratio) due to the thermal noise or fading. In this paper, we have studied the throughput of wireless ad hoc networks taking account of the continuous carrier detection probability and the data reception probability. Analytical results indicate that, considering the above mentioned continuous probabilities, more than one problem such as hidden terminal or exposed terminal arise and decrease the system throughput, whereas only one problem decreases it in the analysis without assuming these probabilities. The analytical results are verified by a comparison of results from computer simulations assuming IEEE 802.11a protocol. Through network simulations, we also show that a routing algorithm can decrease network delay by taking the quality of wireless links into account especially when these continuous probabilities are assumed. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ad hoc networks / CSMA/CA / MAC / hidden terminals / exposed terminals / routing |
| Paper # | SIP2006-146,RCS2006-204 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2007/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Throughput Evaluation of CSMA/CA Assuming Carrier Detection Probability in Wireless Ad Hoc Networks |
| Sub Title (in English) | |
| Keyword(1) | ad hoc networks |
| Keyword(2) | CSMA/CA |
| Keyword(3) | MAC |
| Keyword(4) | hidden terminals |
| Keyword(5) | exposed terminals |
| Keyword(6) | routing |
| 1st Author's Name | Masahiro FUJII |
| 1st Author's Affiliation | Graduate School of Informatics, Kyoto University() |
| 2nd Author's Name | Koji YAMAMOTO |
| 2nd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 3rd Author's Name | Hidekazu MURATA |
| 3rd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 4th Author's Name | Susumu YOSHIDA |
| 4th Author's Affiliation | Graduate School of Informatics, Kyoto University |
| Date | 2007-01-25 |
| Paper # | SIP2006-146,RCS2006-204 |
| Volume (vol) | vol.106 |
| Number (no) | 479 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |