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研究生： 林昌一
Chang-Yi Lin
論文名稱： 簡單且彈性化的軟體代理人通訊協定之探討與實作
A study of the simple and flexible transfer protocol for agents
指導教授： 薛義誠
Y. C. Shiue
口試委員:
學位類別： 碩士
Master
系所名稱： 管理學院 - 資訊管理學系
Department of Information Management
畢業學年度： 90
語文別： 中文
論文頁數： 81
中文關鍵詞： 軟體代理人 、通訊協定 、案例式推理
外文關鍵詞： case-based reasoning, agent, protocol
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    • 科技發展持續快速成長，軟體代理人（Software Agent）應用領域也隨之擴張。軟體代理人之間的溝通需要三個部分組成：1、互動協定的智慧2、互相溝通所使用的語言3、傳遞語言的通訊協定[10]。針對第三部分之需求，本文提出一簡單且具彈性化的軟體代理人通訊協定（Simple and Flexible Transfer Protocol, SFTP）架構，利用分層介面設計的方式並整合不同特性的網路通訊協定，使代理人間的通訊更為方便與可靠。
    整合不同特性的協定需要一個自動化的挑選機制。案例式推理法（Case-based Reasoning, CBR）可選取過去存在的相似問題，使用其解答問題之經驗，來解答現有的問題[34]。在許多研究中，並證明其分類預測的功能。因此，本文採用案例式推理法作為傳輸訊息時挑選協定的機制。
    透過以上方法之整合，本研究提出架構經實驗證明能有效達成網路容錯的目的，並滿足軟體代理人傳遞訊息需求。

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    1.1 研究背景 1 1.2 研究動機 3 1.3 研究目的 4 1.4 研究限制 6 1.5 研究步驟與方法 7 1.6 論文架構 8 第二章 文獻探討 9 2.1 軟體代理人的定義 9 2.2 軟體代理人特性 11 2.3 軟體代理人種類 13 2.4 軟體代理人溝通語言 15 2.4.1 知識查詢和控制語言 16 2.4.2 代理人溝通語言 18 2.5 代理人傳輸協定 19 2.6 案例式推理 23 2.6.1 案例式推理法的定義 24 2.6.2 案例式推理法的用途 25 2.6.3 案例式推理法實施步驟 27 第三章 系統分析與設計 29 3.1 網際網路的傳輸協定 29 3.2 簡單且具彈性化的軟體代理人通訊協定架構概觀 32 3.2.1 SFTP所提供的服務 34 3.3 元件組成 38 3.3.1 代理人介面 39 3.3.2 代理人名稱管理員 41 3.3.3 SFTP聯絡員 41 3.3.4 任務管理員 43 3.3.5 訊息倉儲管理員 43 3.3.6 協定管理員 44 3.3.7 協定介面 44 3.4 協定介面要求 46 3.5 服務介紹 47 3.5.1 註冊和反註冊 47 3.5.2 傳送訊息 49 3.5.3 接收訊息 51 3.6 案例式推理與協定挑選機制 53 3.6.1 案例擷取 54 3.6.2 案例挑選 56 3.6.3 提供解答 59 第四章 實驗設計與結果 60 4.1 實驗環境 60 4.2 實驗設計 61 4.2.1 實驗假設 62 4.2.2 參數和環境設定 62 4.3 單一通訊協定和SFTP之比較 64 4.3.1 單一通訊協定實驗環境組合 64 4.3.2 SFTP協定實驗環境組合 65 4.3.3 實驗結果 65 4.3.4 結果分析 65 4.4 網路狀況對SFTP表現的影響 66 4.4.1 單一通訊協定實驗環境組合 66 4.4.2 SFTP協定實驗環境組合 66 4.4.3 實驗結果 66 4.4.4 結果分析 67 4.5 尋找最佳權重 68 4.5.1 實驗組合 71 4.5.2 實驗結果 71 4.5.3 結果分析 73 4.6 案例式推理法和隨機挑選法 73 4.6.1 實驗組合 73 4.6.2 實驗結果 73 4.6.3 結果分析 75 第五章 結論與建議 76 5.1 結論 76 5.2 建議與後續工作 77

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