2023 Fiscal Year Final Research Report
Research on performance improvement of non-orthogonal multiple access in cooperation with orthogonal multiple access
| Project/Area Number |
19K04381
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21020:Communication and network engineering-related
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| Research Institution | Waseda University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | NOMA / OMA / リソース割当て / ユーザ要求 / システムスループット |
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| Outline of Final Research Achievements |
In this research, we focus on Non-Orthogonal Multiple Access (NOMA), a core technology of the fifth-generation mobile communication system (5G), and propose the hybrid multiple access scheme simultaneously using NOMA and Orthogonal Multiple Access (OMA) within the band in order to overcome the problem of degrading the performance of NOMA in the case of small channel gain difference between users. In addition, in anticipation of future diversification of wireless services, we propose a resource allocation method that considers not only users' propagation path information but also their diverse throughput requirements. Performance evaluation through computer simulations showed that in the multi-cell environment specific to mobile communications, the throughput performance of the proposed method is better than that of the cases using only NOMA or only OMA.
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| Free Research Field |
無線通信ネットワーク
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| Academic Significance and Societal Importance of the Research Achievements |
提案するNOMAとOMAのハイブリッド多元接続方式は，ユーザ間のチャネル利得差の小さい低CNR領域では，OMAを活用し，ユーザ間の高いチャネル利得差が期待できる高CNR領域では，NOMAを活用できることから，チャネル利得差の小さい場合に生じるNOMAのシステム容量劣化の問題を効果的に克服できる．また，5Gで想定される多様な要求スループットに対しても，提案方式の有効性が確認できたことから，5G以降の移動通信ネットワークで求められる多様な通信トラヒックを前提とした無線ネットワークの高度化に貢献できる．
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