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    Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/84748


    Title: 適於DTN環境下的適地性內容服務之實踐議題研究
    Other Titles: Practice Issues for Location and Content-Based Services in Dtn Environments
    Authors: 蔡子傑
    Contributors: 資訊科學系
    Keywords: 適地性內容服務;耐延遲網路;Android;P2P;獎勵機制;訊息優先權
    Location and Content Based Services;Delay Tolerant Networks;Android;P2P;Incentive;message priority
    Date: 2012
    Issue Date: 2016-04-15 11:32:35 (UTC+8)
    Abstract: 近年來，無線網路技術不斷推陳出新，政府也不斷建設無線網路的基礎建設，在都市每個角落皆能收到無線網路的訊息，使用者擁有行動裝置即能連上網路，將不被地區及時間所限制。 然網路連線常遇壅塞，或有些使用者並無3G上網能力，而通常又需要適地性內容服務(Location and Content Based Service)的Data query/upload的需求。因此，在此情況下，耐延遲網路(Dealy/Disruption Tolerant Networks, DTN)架構的可能應用價值更能呈現。 但上述DTN關鍵成功因素為Data Forwarding設計、轉發誘因、以及是否可提升優先轉發策略等。因此將針對這些議題加以研究，並部份功能實踐於WiFi Direct行動裝置上評估效能，預期這將是一個完整實用性的技術與應用之關鍵研究。 本研究的議題如下：針對在耐延遲網路下提出行動定位資料搜尋方法、路徑選擇獎勵機制及訊息優先權演算法。依據耐延遲網路訊息傳遞的特性儲存後轉發，各別提出方法來解決使用者無法連上網路的困境。最終將所提的方法能在Android上部份系統實作，驗證其設計結果的可行性。
    Recently, the technologies of wireless networking advance rapidly. In additions, users can almost everywhere in the metropolitan area receive/access wireless messages due to government’s continuous infrastructure deployment. However, sometimes network would suffer congestion due to traffic concentration or hot spot. Or some users would not have subscriptions to 3G data services. These users still have the needs for Location and Content Based Services which often require to query data and to upload them. In this situation, DTN (Delay/Disruption Tolerant Networks) will be more suitable and increase the application value. To be a success, the key challenging issues will be data forwarding design, forward incentive, and differentiated message priority. We will study these issues and practice part of the developed features into an integrated system using WiFi Direct enabled mobile devices to do field test. It is expected as a crucial study for the practice of location and content based service for DTNs. The research issues of this project will be: location-based content search approach, message forwarding strategies with incentive mechanism, and message priority design. Finally, proof of concept will be made through by Android mobile devices.
    Relation: 計畫編號 NSC101-2221-E004-005
    Data Type: report
    Appears in Collections:[資訊科學系] 國科會研究計畫

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