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研究生:林季宏
研究生(外文):CHI-HUNG LIN
論文名稱:飛機平台在無線通訊上的應用
論文名稱(外文):Applications of the HAPS in Wireless communication systems
指導教授:張進福張進福引用關係
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:電信工程學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:81
中文關鍵詞:飛機平台
外文關鍵詞:high altitude platform system
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無人飛機平台的出現使得通訊方式有了新一種的選擇。除了地面基地台或衛星之外,還可以使用飛機平台來提供服務。這篇論文的精神就在於如何安排飛機平台在通訊系統中的角色。
現今已存在的GSM系統中,人們利用基地台來提供資料傳送。但若發生了地震或停電時,也就是說地面設備損毀之下,我們可以使用飛機平台來彌補地面設備中斷的時間,例如921大地震,美國停電等。或者是山上與海洋等不能架設基地台的地區,可以透過飛機平台達到通訊的目的。而在平時的時候,可以提供偏遠山區語音通訊的服務,以及都市地區無線上網的服務。
若要提供偏遠山區語音的服務,要考慮到手機的漫遊性,為了減少使用者的困擾,我們希望相同的手機可以接收到兩個系統訊號,也就是不希望進入山區後要換另一隻手機使用。所以,飛機平台的通訊系統要符合GSM的規格,以及兩系統間會產生怎樣的干擾問題,這是我們研究的規劃。
最後,我們要進入3G時代,飛機平台不可不跟上腳步。若利用飛機平台來提供3G系統時,不希望只侷限於服務偏遠山區,也要求飛機平台能提供都市地區的使用,因此會有使用者人數不足的問題產生。而後進入3G成熟期時,我們希望飛機平台能與其他的系統整合互相搭配,要有新的移動管理機制與切換模式,都是相當實際地狀況。
第一章 緒論.....................................1
1.1 簡介..........................................1
1.2 飛機平台的特性................................2
1.3 服務性質......................................3
1.4 系統比較......................................4
1.5 研究動機......................................4
1.6 文獻回顧......................................5
1.7 論文架構......................................6
第二章 飛機平台的系統特性與架構.................7
2.1 簡介飛機平台與環境架構........................7
2.2 天線.........................................10
2.3 必v分佈.....................................13
2.4 換手.........................................15
2.5 時間超前.....................................16
2.6 飛機平台網路.................................21
2.6.1 整合網路與語音.........................24
2.7 急難通訊.....................................26
2.8 結論.........................................27
第三章 飛機平台與GSM系統互相干擾問題...........29
3.1 飛機平台的用途與場景.........................29
3.2 細胞.........................................31
3.3 頻率重複使用.................................33
3.4 傳輸模型.....................................35
3.5 系統共存.....................................40
3.6 邊界問題.....................................51
3.7 結論.........................................52
第四章 飛機平台在3G系統的應用..................53
4.1 3G系統簡介...................................53
4.2 必v控制.....................................54
4.3 問題描述.....................................55
4.4 提出的演算法.................................58
4.5 行動管理.....................................62
4.6 切換流程圖...................................65
4.7 切換機制.....................................67
4.8 通訊協定.....................................70
4.8.1 GSM protocol...........................70
4.8.2 mobility protocol......................72
4.9 結論.........................................74
第五章 結論....................................75
參考資料.........................................77
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