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研究生： 羅國倫
Kuo-Lun Lo
論文名稱： 在無線行動隨建即用網路下Geocast 之設計與實做經驗
Design and Implementation Experience of Geocast in Wireless Mobile Ad Hoc Networks
指導教授： 許健平
Jang-Ping Sheu
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 資訊工程學系
Department of Computer Science & Information Engineering
畢業學年度： 89
語文別： 中文
論文頁數： 23
中文關鍵詞： 全球定位系統 、Geocast
外文關鍵詞： mobile computing, mobile ad hoc networks (MANET), location-aware applications, Global Positioning System (GPS), Geocast, wireless communication
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    • Mobile ad hoc network(MANET，無線隨建即用網路) 是一個Mobile hosts之間可以互相溝通而不需經過Base Station的網路環境。地理位址資訊可以幫助無線網路中的行動節點傳送訊息，GPS接收器則可以幫助這些節點獲得地理資訊。
    在本篇文章中，我們提到了一個新的繞徑協定稱為GeoGRID，此協定可以提供訊息給位於特定地理區域的行動節點，並且可以有效降低行動節點傳送訊息所造成的廣播風暴效應。
    我們這次實作的平台是採用Linux作業系統，使用者的介面則是於X-window的環境下發展，主要提供針對於某特地區域中的行動節點做訊息廣播。
    我們實作了一個將GPS系統結合到無線行動隨建即用網路之繞徑協定上，並可以由使用者於視窗環境介面下操作，由於GPS的資料日益精準，我們將可以在這樣的網路架構上，做更多、更廣泛的應用。

    Contents 1 Introduction . . . ............................ 1 2 Geocasting Protocol . ...........................3 3 System . . . ....................................8 3.1 GPS Daemon . . ............................ 9 3.2 Gateway Election Daemon . ................. 10 3.3 Geocast Daemon . .......................... 11 4 Graphic Interface . . . ........................13 5 Packet Format . . . ............................18 5.1 Bid Packet, Gate Packet ................... 18 5.2 Retire Packet . . . ....................... 19 5.3 GeoBid Packet . . ......................... 19 5.4 GeoData Packet . . ........................ 20 6 Performance Test . . . .........................21 7 Conclusion . . . ...............................23

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