TAILIEUCHUNG - Báo cáo hóa học: "Research Article MIMO Network Coding-Based PHY/MAC Protocol for Replacement of CSMA/CA in Efficient Two-Way Multihop Relay Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article MIMO Network Coding-Based PHY/MAC Protocol for Replacement of CSMA/CA in Efficient Two-Way Multihop Relay Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 476732 20 pages doi 2010 476732 Research Article MIMO Network Coding-Based PHY MAC Protocol for Replacement of CSMA CA in Efficient Two-Way Multihop Relay Networks Gia Khanh Tran Kei Sakaguchi and Kiyomichi Araki Department of Electrical and Electronic Engineering Tokyo Institute of Technology Meguro-ku O-okayama 2-12-1 Tokyo 152-8552 Japan Correspondence should be addressed to Gia Khanh Tran khanhtg@ Received 2 January 2010 Revised 20 May 2010 Accepted 20 June 2010 Academic Editor Meixia Tao Copyright 2010 Gia Khanh Tran et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Backbone wireless mesh networks have attracted much of attention due to their wide-range applications. The use of CSMA CA based MAC protocols in mesh networks however leads to an inefficient resource utilization and to high latency. Several alternative protocols including directional MAC multichannel MAC only provide marginal improvement. Recently a cross-layer design employing multiple antenna techniques and network coding called MIMO network coding was proposed. Owing to multiple access interference cancellation ability of MIMO bi-directional flow multiplexing capability of network coding in combination with an efficient channel access scheme of TDMA TDD MIMO two-way relay provides significantly high end-to-end capacity. In this paper MIMO network coding is considered as an alternative PHY MAC protocol of CSMA CA. This paper provides details of the protocol and develops network simulators for performance evaluation. Furthermore an efficient retransmission scheme for transmission system employing network coding is proposed. The paper shows that MIMO network coding achieves significant network

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