臺灣博碩士論文加值系統

無線用戶迴路提供固定用戶雙向通話服務，具有快速且容易鋪設的優點，為用戶迴路系統的另一種選擇。由於無線用戶迴路涉及無線通訊技術及無線資源分配，其維護管理較傳統用戶迴路系統複雜，故無線用戶迴路之監控維護便顯得格外重要。
本論文敘述一套DECT無線用戶迴路的監控維護系統之設計及實作。本系統具有下列特點：以客戶-伺服為基礎，可透過網際網路進行遠端操控；以物件導向技術設計與實作，將整個無線用戶迴路視為一階層式物件模型；提供「可安插式服務機制」，具有動態更換與擴充網管服務功能的優點；設計典型廣泛應用在此系統的設計中，提高軟體模組的可重複利用性；提供圖形化使用介面，讓使用者得以直覺地操作；提供全球資訊網介面的網管功能。

WLL provides two-way calling services to the standtionary or "fixed" users, which has the advantage of easy installation and deployment, and is intended to replace its wireline counterpart. The WLL involoves the radio resource allocation, management of WLL has higher complexity that it's wieline counterpart. Thus, OA&M for WLL is more critical than that for wireline local loop.
This thesis describes the design and implementation of an OA&M system for DECT-based WLL network. This system follows the client-server architecture that enables remote management through the Internet. Object-oriented design is used to yield quality software, where the entire WLL network is treated as a hierarchical collection of objects. The "plug-in" mechanism provides the capabilities of replacing and extending OA&M functionalities in run-time. Design patterns are applied to improve the reusability of software components. Two types of user interfaces are implemented in different platforms to provide access to the OA&M system. Although our design is tailored for the WLL network, it is also appropriate to serve as the OA&M system for other small-scale telecommunication systems.

1 Introduction 1
1.1 The Wireless Local Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 The Operations, Administration, and Maintenance (OA&M) . . . . . . . . . . . 3
1.2.1 OA&M Management Functions . . . . . . . . . . . . . . . . . . . . . . 4
1.2.2 OA&M System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Architecture and Protocols 8
2.1 WLL-OAM Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 OA&M Message-Exchange Interface . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 OA&M Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.2 Message Transmission Paradigm . . . . . . . . . . . . . . . . . . . . . . 11
2.3 OA&M User-Command Interface . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.3.1 UCI Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.2 OA&M Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3.3 Connection Management . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.3.4 Examples of OA&M Information Exchange . . . . . . . . . . . . . . . . 23
3 OA&M Software Design 25
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2 Object-Oriented Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2.1 Building a Quality Software . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2.2 Design Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.3 OA&M Server Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.1 Object-Oriented Design . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.2 Multithreaded Programming . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.3 OA&M Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.4 OA&M Services as "Plug-Ins" . . . . . . . . . . . . . . . . . . . . . . . 35
3.3.5 WLL Information Management . . . . . . . . . . . . . . . . . . . . . . 36
3.3.6 TCP/IP Client-Server Model . . . . . . . . . . . . . . . . . . . . . . . . 37
3.4 OA&M Client Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.4.1 Object-Oriented Design . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.4.2 Graphical User Interface (GUI) . . . . . . . . . . . . . . . . . . . . . . 40
3.4.3 Web-Based Application . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4 Conclusion and Future Work 44
4.1 Current Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.2 Future Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.2.1 Supporting Distributed Object Computing . . . . . . . . . . . . . . . . . 45
4.2.2 Network Management Standards Compliance . . . . . . . . . . . . . . . 46

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