臺灣博碩士論文加值系統

隨著資訊家電及家庭網路的盛行，使用者可能直接儲存他們的重要資料到一個獨立的硬碟。而這些資訊設備可能會由外面直接連接家庭網路或辦公室網路，並存取共用的儲存設備。這新趨勢產生一新架構，即是允許所有設備可在任何地方不經由PC去直接存取硬碟。
本篇論文主要想提供易於使用的代理人儲存系統。此系統具備跨平台、隨插隨用、簡化伺服器及易於使用等特性。因此，不同平台的資訊都可備份於此系統中。只要一加入此系統，就可使用系統中的服務。同時使用者可輕易地存取資料。藉由實做此一架構，來驗證我們的構想。同時並由結果分析尚須改進之處，促使未來實際應用之研發。

As the information appliance and home network is more and more popular, users may store their important data to an external hard disk directly. It is possible that there are a number of information appliances outside to be connected to a home network or a local network and access a common storage device. This new trend initiates a new framework that allows all the devices to access to a hard disk without going through a PC anywhere.
This thesis is intended to provide an architecture for agent-based storage system. The system has the features of platform independent, plug-and-play, server simplifying, and easy to use. For the reason, the information at different platforms can be backup there. The service can be used immediately if already join the system. And users can easily access the information. We implement the architecture to express our idea, and the result is shown for improvements that enable future practical applications.

Table of Contents
Abstract in Chinese..........................................i
Abstract in English.........................................ii
Acknowledgements...........................................iii
Table of Contents...........................................iv
List of Figures............................................vii
Chapter 1 Introduction.......................................1
Chapter 2 Background.........................................3
2.1 The Distributed System............................3
2.1.1 The Linda System..........................5
2.2 The Jini Device Architecture......................6
2.3 The Agent Based Storage System....................7
2.4 The Issues and Solutions..........................9
2.5 Previous Work....................................11
2.5.1 CORBA....................................11
2.5.2 DCOM.....................................12
2.5.3 Jini/Java................................13
2.5.4 Comparison of CORBA, DCOM and Jini
technologies.............................14
Chapter 3 Java Intellectual Network Infrastructure..........16
3.1 The Relation between Java and RMI................16
3.2 The Infrastructure of RMI........................16
3.2.1 Stub/Skeleton Layer......................17
3.2.2 Remote Reference Layer...................17
3.2.3 Transport Layer..........................18
3.3 The Jini System Overview.........................18
3.3.1 Key Concepts.............................18
3.3.2 Component Overview.......................19
3.3.3 System Architecture......................20
3.4 The Lookup Service...............................23
3.4.1 Key Concepts.............................23
3.5 Jini Discovery and Join Protocol.................24
3.5.1 The Discovery Protocol...................25
3.5.1.1 The multicast request protocol...25
3.5.1.2 The multicast announcement protocol ............................................................27
3.5.1.3 The unicast discovery protocol...27
3.5.2 The Join Protocol........................29
Chapter 4 Implementation of Agent-Based Storage System......31
4.1 The Architecture of an Agent-Based Storage System.. ............................................................31
4.1.1 Setup Phase..............................31
4.1.2 Performing Phase ........................32
4.2 The Implementation...............................37
4.2.1 The Service Interface....................37
4.2.2 The Server Program.......................39
4.2.3 The Client Program.......................40
Chapter 5 Results Analysis..................................47
5.1 Testing Environment..............................47
5.2 Testing Result...................................47
5.2.1 Testing Result of the Service Provider...47
5.2.2 Testing Result of the Client.............48
5.3 The Analysis.....................................57
Chapter 6 Extended Discussion...............................59
Chapter 7 Conclusions.......................................61
References..................................................63

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