2009 Fiscal Year Final Research Report
Research and Development of MIMO-OFDM Mesh Network
| Project/Area Number |
19206043
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
ARAKI Kiyomichi Tokyo Institute of Technology, 大学院・理工学研究科, 教授 (90016668)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAGUCHI Kei 東京工業大学 (80323799)
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| Project Period (FY) |
2007 – 2009
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| Keywords | メッシュネットワーク / MIMO / 双方向中継 / ネットワーク符号 / 与干渉・被干渉回避 / 伝送特性評価 / デモンストレータ / 実験 |
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| Research Abstract |
This is an R&D research project of MIMO mesh network which consists of multiple relay nodes equipped with MIMO antenna to relay packets in a multi-hop manner. Based on investigation of MIMO transceiver design, resource allocation, node synchronization, network coding and cooperative relay, we established protocols for different layers of the mesh network and developed a demonstrator system. Through evaluation of transmission performance, we confirmed superiority of the proposed system to achieve a 6 times gain in achievable throughput and significant packet delay reduction in comparison with conventional multi-hop relay protocols based on CSMA/CA. We also proposed an adaptive wireless resource allocation scheme to maintain the effectiveness of the proposed system even in non-uniform network topology. In the demonstrator system, we realized two-way relay of graphic data, which is also a proof for the effectiveness of the proposed synchronization scheme. Furthermore, experiment results with a setup of 3 relay nodes in an indoor environment practically confirmed the superiority of two-way relay.
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