2023 Fiscal Year Final Research Report
Research on terminal-oriented handover in wireless systems
| Project/Area Number |
20K11781
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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 60060:Information network-related
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 無線システム / 基地局間ハンドオーバー / 確率的ペトリネット(SPN) / 連続時間マルコフ連鎖(CTMC) / ヘテロジニアスネットワーク / トランザクション失敗率 / 端末主導ハンドオーバー / 5G |
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| Outline of Final Research Achievements |
In this study, we constructed a mathematical model for inter-base station handover in wireless communication systems and evaluated its performance. By using Stochastic Petri Nets and Continuous-Time Markov Chains, we calculated the steady-state probabilities of each system state, enabling more theoretically precise analysis independent of specific simulation initial conditions or scenarios. Specifically, we investigated the relationship between transaction failure rates and inter-cell handover in heterogeneous cellular networks, presenting our findings at international conferences to foster academic discussions. Additionally, we proposed a novel approach to support terminal-driven handover by pre-allocating synchronization resources from neighboring base stations and storing Random Access Preamble (RAP) information in mobile terminals. This approach allows mobile terminals to achieve handover autonomously even when communication with the source base station is disrupted.
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| Free Research Field |
無線通信システム、数理モデル、ネットワークシミュレーション
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は、無線通信システムの効率化と信頼性の向上に寄与すると考える。数理モデルによる解析は、実際の無線ネットワークの運用において、ハンドオーバの最適化とシステム障害の予防に役立つ。また、端末主導のハンドオーバ支援手法は、移動端末の通信品質を維持しつつ、ネットワークリソースの有効活用を可能にすることで、次世代の無線通信技術の発展に貢献すると考える。
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