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研究生:陳秋蓮
研究生(外文):Chiu-Lien Chen
論文名稱:以無線網路為基礎之定位研究及其應用
論文名稱(外文):WLAN-based Positioning and Its Applications
指導教授:李錫捷李錫捷引用關係
指導教授(外文):Hsi-Chieh Lee
學位類別:碩士
校院名稱:元智大學
系所名稱:資訊管理學系
學門:電算機學門
學類:電算機一般學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:60
中文關鍵詞:無線區域網路定位三角定位特徵定位訊號強度SimNet
外文關鍵詞:WLAN-based PositioningTriangulationFingerprintingRSSISimNet
相關次數:
  • 被引用被引用:5
  • 點閱點閱:339
  • 評分評分:
  • 下載下載:3
  • 收藏至我的研究室書目清單書目收藏:1
以無線網路為基礎之定位服務是目前相當熱門之研究議題;它使用目前最普及之802.11標準,不但可以利用現有之無線網路環境以有效地降低建置定位服務之成本,更可以達到定位系統之廣泛應用。本研究分析目前可行之無線區域網路定位服務相關技術,並針對室內環境定位服務問題進行探討。
為了達到能在室內空間定位並提供適當之資訊服務,本研究提出三角定位及特徵定位方法,利用自行設計之使用者操作介面,針對定位環境之訓練點進行訊號強度實測,建立所有訓練點之訊號強度特徵資料庫。藉由行動裝置即時收集每台AP之訊號強度值(RSSI),主要以特徵定位法進行定位運算並與所建立之資料庫進行比對,進而判斷出該使用者之位置,應用於自動導覽系統。實驗結果顯示以SimNet相似度比對方法相較於Inner Product與Nearest Neighbor方法的準確度為最高。另外,由於室內環境干擾的因素,三角定位法將會產生極大的誤差範圍。
The positioning service that based on wireless network is a quite hot research topic at present; it uses 802.11 standards that popularized the most recently. It not only utilize the existing wireless network environment to reduce the cost that the construction oriented the service effectively, but also reach the wide application of the positioning system even more. The research analyzes feasible WLAN positioning techniques, and carries on the discussion to the indoor positioning problems.
In order to find out the position and offer proper location-based information, we proposed both triangulation and fingerprinting methods. Both methods measured the signal strength of every APs'' RSSI for further calculation. However, the fingerprinting methods needed some pre-trained data points for positioning. The experimental results had shown that the fingerprinting method which utilized SimNet function yielded highest accuracy comparing with Inner product function and Nearest Neighbor function. Moreover, the triangulation method yielded worst results mainly due to the complicated indoor environment.
書名頁 i
論文口試委員會審定書 ii
授權書 iii
中文摘要 iv
英文摘要 v
誌謝 vi
目錄 vii
表目錄 ix
圖目錄 x
一、緒論 1
1.1 研究動機 1
1.2 研究目的 2
1.3 研究步驟 3
二、相關研究 4
2.1 無線區域網路介紹 4
2.1.1 無線區域網路標準 4
2.1.2 無線網路運作模式 5
2.1.3 無線網路的應用範圍 6
2.1.4 無線網路之安全性與技術探討 8
2.2 相關的定位技術 9
2.2.1 無線定位模式 9
2.2.2 定位服務技術 10
三、定位實驗 14
3.1 定位研究方法 14
3.1.1無線訊號三角定位 (RF Triangulation) 15
3.1.2無線訊號特徵定位 (RF Fingerprinting) 20
3.2 實驗硬體 26
3.2.1 行動裝置 (Mobile Device) 26
3.2.2 無線基地台 (Access Point) 27
3.2.3 無線網路卡 (WNIC) 28
3.3 實驗場地 28
3.3.1 實驗環境設定 29
3.3.2 無線訊號範圍圖 31
四、定位系統之實作 34
4.1 實作系統架構 34
4.1.1 系統實作硬體架構 36
4.1.2 系統開發工具與環境 37
4.2 系統功能展示 37
4.2.1 程式功能架構 38
4.2.2 定位流程 43
4.2.3 使用者介面 44
4.3 系統實驗結果與分析 47
4.3.1 實驗結果比較 47
4.3.2 取樣點多寡之準確度比較 49
4.3.3 定位準確度之探討 56
五、結論與未來發展方向 58
5.1 結論 58
5.2 未來發展方向 59
參考文獻 60
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