Enhancement of CSMA/CA and Network Coding in Single-Relay Multi-User Wireless Networks
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- HUANG Chun-Hsiang
- NTT Access Network Service Systems Laboratories, NTT Corporation
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- UMEHARA Daisuke
- Graduate School of Informatics, Kyoto University
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- DENNO Satoshi
- Graduate School of Informatics, Kyoto University
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- MORIKURA Masahiro
- Graduate School of Informatics, Kyoto University
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- SUGIYAMA Takatoshi
- NTT Access Network Service Systems Laboratories, NTT Corporation
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Network coding is a promising technique for improving system performance in wireless multihop networks. In this paper, the throughput and fairness in single-relay multi-user wireless networks are evaluated. The carrier sense multiple access with collision avoidance (CSMA/CA) protocol and network coding are used in the medium access control (MAC) sublayer in such networks. The fairness of wireless medium access among stations (STAs), the access point (AP), and the relay station (RS) results in asymmetric bidirectional flows via the RS; as a result the wireless throughput decreases substantially. To overcome this problem, an autonomous optimization of minimum contention window size is developed for CSMA/CA and network coding to assign appropriate transmission opportunities to both the AP and RS. By optimizing the minimum contention window size according to the number of STAs, the wireless throughput in single-relay multi-user networks can be improved and the fairness between bidirectional flows via the RS can be achieved. Numerical analysis and computer simulations enable us to evaluate the performances of CSMA/CA and network coding in single-relay multi-user wireless networks.
収録刊行物
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- IEICE Transactions on Communications
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IEICE Transactions on Communications E93-B (12), 3371-3380, 2010
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
- 1390282679352058880
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- NII論文ID
- 10027982111
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- NII書誌ID
- AA10826261
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- ISSN
- 17451345
- 09168516
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- HANDLE
- 2433/156522
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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
- IRDB
- Crossref
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