A Novel Backoff Scheme and Its Throughput Analysis for Full Duplex MAC Protocols in Wireless LANs
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- SAKAKURA Shota
- Department of Electrical and Electronic Engineering, Mie University
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- FUJIMURA Chikara
- Department of Electrical and Electronic Engineering, Mie University
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- SANADA Kosuke
- Department of Electrical and Electronic Engineering, Mie University
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- HATANO Hiroyuki
- Department of Electrical and Electronic Engineering, Mie University
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- MORI Kazuo
- Department of Electrical and Electronic Engineering, Mie University
抄録
<p>Wireless full duplex (FD) communication can double the point-to-point throughput. To fully realize the benefits of the FD technique in wireless local area networks (WLANs), it is important to design the medium access control (MAC) protocols for FD communications. In FD MAC protocols, when a node wins the channel contention and transmits a primary transmission, its destination node can start a secondary transmission triggered by the primary transmission. Each secondary transmitter transmits a data frame even if its backoff timer is not zero. However, the backoff scheme in the FD MAC protocols follows the conventional scheme based on the distributed coordination function (DCF). Therefore, the nodes with FD MAC initialize the contention window (CW) size to minimum CW (CWmin) after their successful secondary transmissions. Therefore, CW initialization in the FD MAC causes further collisions at stations (STAs), which degrades network throughput. This paper proposes a novel backoff scheme for FD MAC protocols. In the proposed scheme, the CW size and backoff timer are not initialized but kept the current value after secondary transmissions. The proposed scheme can mitigate frame collisions at STAs and increase FD-transmission opportunity in the network, and then enhance the throughput significantly. This paper presents comprehensive performance evaluation in simulations, including non-saturation and saturation conditions, and co-existence conditions with legacy half duplex (HD) STAs. For performance analysis, this paper establishes Markov-chain models for the proposed scheme. The analytical results show theoretically that the operation of the proposed scheme enhances network throughput. The simulation results and analytical results show the effectiveness of the proposed scheme.</p>
収録刊行物
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- IEICE Transactions on Communications
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IEICE Transactions on Communications E103.B (9), 989-1001, 2020-09-01
一般社団法人 電子情報通信学会
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詳細情報 詳細情報について
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- CRID
- 1390566775163561728
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- NII論文ID
- 130007894673
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- ISSN
- 17451345
- 09168516
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可