臺灣博碩士論文加值系統

近年來，由於可攜式產品及無線通訊技術的進步，傳統上在定點的網路通訊模式，已不能滿足使用者的需求。在不久的將來，人們將可以在任何時間、任何地點，使用可攜式產品透過有線或無線介面來連上網路，並且可以享受漫遊的服務。而隨著各種有線與無線網路系統的蓬勃發展，如果能有效的整合各種網路系統，將可以滿足使用者更多元化的需求。
在本論文中，我們提出了一個控制模組 (Control Module)－異質網路整合中心（Heterogeneous Network Integration Center）－用以整合四個現有的網路：網際網路（Internet）、無線區域網路（Wireless Local Area Network）、公眾交換電信網路（Public Switched Telephone Network），以及GSM（Global System for Mobile Communication）。而異質網路整合中心所提供的功能包含了︰提供基本的、一般性的Primitive functions，行動電腦及基地台的管理，網路位置轉換（Network Address Translation）機制用以提供網路的通透性（Transparency），以及支援建立無縫漫遊 (Seamless Roaming) 的機制。另外也採用了讓使用者可依據不同的協定或運作模式，自行增加所需要的功能函式到異質網路整合中心的功能擴充概念，以供使用者或系統模組來使用。本論文旨在說明這樣一個用以提供無縫漫遊、網路通透性的控制模組，我們的設計考量、模組的運作模式、以及其元件之設計。主要的貢獻在於建立一個新的網路整合環境，以支援新的應用程式。

In recent years, due to the advance in technology of portable products and wireless communication, the traditional way of the network communication mode at fixed location can’t satisfy users any more. In the future, people can use portable products to connect with network through wired and wireless interface, and obtain the service of roaming in anytime and anywhere. As the rising development of all wired and wireless network systems, we can satisfy user’s diverse demand by integrating those network systems effectively.
In this thesis, we proposed a Control Module - Heterogeneous Network Integration Center (HNIC) to integrate four existing networks. These four networks are Internet, Wireless Local Area Network, Public Switched Telephone Network, and Global System for Mobile Communication. Heterogeneous Network Integration Center provides the capabilities, includes basic Primitive functions, management of mobile computers and base stations, network address translation mechanism (which is used to provide the transparency), and the mechanism that support seamless roaming. In addition, we use the concept of extensibility to make user to add new commands into HNIC according to his requirements. This thesis is emphasized on the designed of the Control Module, our design issues, operation model, and the design of the components. Our major contribution is to build a network integration environment for new applications.

1. 緒論 1
1.1 研究背景與動機 1
1.2 問題 2
1.3 目的 4
1.4 章節提要 5
2. 相關研究 6
2.1 GSM 6
2.2 Mobile IP 10
2.3 Routing Optimal in Mobile IP 14
2.4 Network Address Translation 18
2.5 Network Integration 20
3. 網路整合 21
3.1 整合的目的 21
3.2 整合的設計考量 22
3.2.1 相容於現有網路系統 22
3.2.2 支援通訊漫遊 23
3.2.3 網路位址轉換技術 24
3.2.4 多通訊接送器架構 26
3.2.5 Agent-based的通訊模式 27
3.2.6 擴充性 27
3.3 整合環境說明 28
3.3.1 系統實體架構 (System Physical Architecture) 28
3.3.2 系統邏輯架構 (System Logical Architecture) 30
3.3.2.1 控制模組 (Control Module) 31
3.3.2.2 介面模組 (Interface Module) 32
3.3.2.2.1基地台 (Base Station) 32
3.3.2.2.2遠距服務台 (High Tier Server) 34
3.3.2.2.3 行動電腦 (Mobile Host) 35
4. 控制模組的設計 37
4.1運作模式 (Operational Model) 37
4.1.1 註冊 (Registration) 37
4.1.1.1離線註冊 (Off-line Registration) 37
4.1.1.2開機註冊 (Start-up Registration) 39
4.1.2 交接 (Handoff) 41
4.1.3 位置追蹤 (Location Tracking) 與連結 43
4.1.3.1 MCma與CH連結 43
4.1.3.2 MCma與MCma連結 44
4.1.4 資料傳送 (Data Transmission) 46
4.2 控制模組軟體架構 52
4.3 控制模組之元件設計 54
4.3.1 異質網路整合中心通訊精靈 54
4.3.2 命令執行器 55
4.3.3 網路位址轉換模組 56
4.3.4 名稱及位置管理模組 58
4.3.5 名稱產生器 59
4.3.6 命令管理者 60
4.3.7 資訊管理資料庫 61
5. 系統實作 63
5.1作業平台與開發工具 63
5.2通訊協定的選擇 63
5.3封包格式 64
5.4系統效能量測 65
5.5系統實作討論 67
6. 結論與未來工作 68
參考文獻 70
附錄 73

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