| Presentation | 2008-09-12 Analysis of Per-Flow Throughput Unfairness for IEEE 802.11-based Multihop Wireless LANs Tomoya TAINAKA, Hiroyuki MASUYAMA, Shoji KASAHARA, Yutaka TAKAHASHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the IEEE 802.11 Distributed Coordination Function (DCF) MAC protocol, the four-way handshake mechanism based on the exchange of request to send (RTS) and clear to send (CTS) messages resolves the hidden terminal problem in a single-hop wireless network, which results in increasing the overall throughput. However, in IEEE 802.11-based multihop wireless local area networks (LANs), the RTS/CTS-based access mechanism and half-duplex transmission of a wireless link cause unfairness in the end-to-end throughput with regard to the number of transmission hops. Most of the previous studies related to this problem are based on simulation, and there is little work taking into account the flow-level behavior resulting from the IEEE 802.11 MAC protocol. In this paper, we analyze the end-to-end throughput for a backhaul-type wireless mesh network using a continuous-time Markov chain. Focusing on the three-node chain topology, we model it as a tandem queueing network with two nodes, deriving the end-to-end throughput. We validate the analysis with ns-2 simulation. Numerical results show that the analytical results agree fairly well with simulation results, and that the throughput of a one-hop flow is hardly affected by the offered load of a two-hop flow. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IEEE 802.11 DCF / Multihop Wireless LAN / Throughput Unfairness / CSMA/CA / Markov Analysis |
| Paper # | NS2008-56 |
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| Committee | NS |
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| Conference Date | 2008/9/4(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Network Systems(NS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Analysis of Per-Flow Throughput Unfairness for IEEE 802.11-based Multihop Wireless LANs |
| Sub Title (in English) | |
| Keyword(1) | IEEE 802.11 DCF |
| Keyword(2) | Multihop Wireless LAN |
| Keyword(3) | Throughput Unfairness |
| Keyword(4) | CSMA/CA |
| Keyword(5) | Markov Analysis |
| 1st Author's Name | Tomoya TAINAKA |
| 1st Author's Affiliation | Graduate School of Informatics, Kyoto University() |
| 2nd Author's Name | Hiroyuki MASUYAMA |
| 2nd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 3rd Author's Name | Shoji KASAHARA |
| 3rd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 4th Author's Name | Yutaka TAKAHASHI |
| 4th Author's Affiliation | Graduate School of Informatics, Kyoto University |
| Date | 2008-09-12 |
| Paper # | NS2008-56 |
| Volume (vol) | vol.108 |
| Number (no) | 203 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |