A method of receiving disaster and crisis management report sent from quasi-zenith satellites Michibiki

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04470
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Hiroshima City University
• Principal Investigator: Takahashi Satoshi 広島市立大学, 情報科学研究科, 准教授 (60359106)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: GNSS / 準天頂衛星 / 災害・危機管理通報 / L1S

Outline of Final Research Achievements

Michibiki, the quasi-zenith satellite operated by Japan's Government Cabinet Office, broadcasts not only positioning messages, but also augmentation messages to improve positioning accuracy and emergency messages regarding disasters and crises. The method for mobile reception of disaster and crisis management reports (DCR) with low power consumption and high reliability has been proposed. In particular, the intermittent reception method that predicts the period during which high-priority content DCR will be broadcast and turns on the receiver only during that period is proposed, and a method for receiving disaster information messages on the European positioning satellite Galileo is considered.

Free Research Field

工学

Academic Significance and Societal Importance of the Research Achievements

DCRメッセージのみを低消費電力にて受信するためには、一定期間だけ受信し、その他の期間を休眠して、平均消費電力を低減する間欠受信の利用が有望である。過去のメッセージ統計を用い、受信したメッセージから将来のメッセージを予測して、休眠に活用する投機的間欠受信方法を提案した。また、この研究を通して得た消費電力低減方法は、無線信号の待機受信を伴う信号検出などにも応用できるものと考えられる。