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    您現在所在的位置:首頁» 新聞網» 科研學術» 正文

    北理工在無人機通信方面取得研究新成果

    供稿: 信息與電子學院 攝影: 信息與電子學院 編輯: 曹安琪
    (2019-07-10) 閱讀次數:
    【字號  大

      日前,北京理工大學信息與電子學院匡鏡明教授團隊在5G/后5G無線傳輸技術研究方面取得重要進展,其研究成果以“Secure UAV Communication Networks over 5G”為題發表在通信領域國際頂級期刊《IEEE Wireless Communications》(影響因子11)。本文的通訊作者為費澤松教授,第一作者為李斌博士生。

      為海量終端設備提供巨連接是5G和后5G系統研究的關鍵技術之一。面對意外或應急情況(例如搶險救災),由于其復雜多變的地理環境和通信環境,部署地面通信基礎設施極具挑戰性。為了解決這一問題,利用無人機(UAV)作為空中通信平臺構建智能異構網絡是一項富有應用前景的技術。與地面固定基站相比,無人機具有部署靈活、移動性可控以及支持高速率傳輸的優點。該研究團隊提出了一種無人機輔助異構網絡的體系結構,旨在構建一個具有更高靈活性和彈性的網絡,可作為現有蜂窩網絡的一種擴展,為熱點地區覆蓋增強或應急部署提供高效靈活的通信保障。

      無人機搭載的無線通信網絡是一個動態的分層網絡,其傳輸的數據易受未授權用戶的竊聽,因此安全傳輸是一個重要課題。該研究團隊引入了三種典型的無人機網絡竊聽場景如圖2所示。(1)在無人機輔助基站覆蓋場景中,通過部署無人機平臺充當移動的空中基站,并輔以現有的網絡架構進行無線信息傳輸,可以實現無線網絡覆蓋區域的快速移動;(2)無人機可作為空中移動中繼為遠距離用戶或用戶群之間提供無線連接;(3)無人機可作為空中用戶與地面用戶共存,支持物聯網的應用,特別是航空貨運服務(如亞馬遜Prime Air和谷歌Wing項目)。

      物理層安全技術作為一種基于信息論的抵御竊聽者的安全保障手段,利用無線傳輸介質的內在隨機性和合法信道與竊聽信道的差異性,為保障信息安全傳輸提供了一種全新的思路。該研究團隊將物理層安全技術應用到無人機通信網絡中:(1)針對無人機基站懸停式隨機異構網絡安全性能受限以及續航能力受搭載電源限制等問題,建立了一種安全能效聯合分析框架;(2)針對無人機移動中繼系統中的空-地鏈路在傳輸數據信息過程中可能會受到惡意竊聽者的截獲,設計了一種兩跳放大轉發無人機中繼網絡安全傳輸策略。

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