臺灣博碩士論文加值系統

在電話系統技術不斷進步之下，建構有線與無線電話整合系統，並適時加入新服務，有效益地將服務整合，會是很重要的議題。在[10]的研究成果中，我們整合一個以小型交換機與泛歐式數位低功率無線電話之PC-DECT系統，配合智慧型網路 (Intelligent Network ; IN) 的概念開發了一個測試平台，並以模組化的軟體架構來設計了一套具有服務整合相容性的交換機系統。本論文延續 [10]研究成果，在PC-DECT系統平台上，整合了電腦與電話整合(CTI)技術，進一步擴充來電轉接與話中插話電信服務功能，同時分析了系統效能。
在此系統平台上，我們遵循PC-DECT系統的運作行為與協定規範及相關協定標準，設計與實現了DECT無線電話與有線電話的雙方通話服務之話務交換程式，並且實作來電轉接與話中插話之電信服務。除此之外，我們透過建置PC-DECT虛擬系統平台，來驗證系統新加入電信服務是否符合系統規格，此虛擬平台可用來模擬系統交換的協定運作。我們根據系統的訊息順序圖(Message Sequence Char ; MSC)，將全程運作分割成數個細步動作程序，量測其全程通話建立時間(Call Setup Time)，用以觀察話務交換程式的運作情況。本論文發現，PC-DECT系統平台在負責資料傳送與接收過程中，CTI Server端的LapRS232協定的傳送緩衝區不敷使用，會有訊息遺失的現象，因而造成通訊連線建立失敗。經由傳送緩衝區擴增後，即系統可支援每秒4個使用者上線的規格。

As telecommunication technology advances, it is important to construct wireless/wired telephone integrated system, add new services at right moment, and integrate telecommunication services efficiently. From the result derived from [10], we construct a PBX/DECT integrated system, PC-DECT system, which is being developed for testing/implementing the IN functionalities. We use modular software architecture to design this integrated PBX system with some advanced telecommunication services. In this thesis, we extend the result of [10] to integrate CTI technology and implement call forwarding and call waiting telecommunication services on PC-DECT system platform, and also analyze the corresponding system performance.
In the PC-DECT system platform, we follow the operation behavior of PC-DECT system and related standard protocol to design and implement related programs of conversation service for DECT wireless/wired subscribers. Except the implementation of call forwarding and call waiting services, we also design a PC-DECT emulation system platform to prove, whether it can match the specification of system when new services are introduced in our system. This emulation platform can be used to simulate protocol operation of PC-DECT system. We divide the call setup procedure into some subprocedures according to MSC (message sequence char), and measure the response time during call setup to observe the operation performance of our PBX program. We found that the transmission buffer of LapRS232 protocol used to transfer and receive messages in CTI server is not enough, and messages maybe lost during the call request stage. This phenomenon causes some call setup procedures fail to respond. By enlarging transmission buffer size of LapRS232 in CTI server, the system can support the call request rate up to four calls per second.

目錄
第一章 簡介.........................1
第二章 系統平台架構與運作流程.....3
2.1 PC-DECT硬體介紹.................3
2.1.1 RE 介紹......................4
2.1.2 CTI Server....................7
2.2 PC-DECT協定介紹................7
2.2.1 LapRS232協定介紹..............8
2.2.2 LapRS232訊息格式說明.........9
2.3 系統控制運作流程................10
2.4 系統的能力......................10
第三章 電信服務實作...............11
3.1實作軟體架構.....................11
3.1.1 系統管理單元..................12
3.1.2 LapRS232單元.................12
3.1.3 PC-DECT 網路層單元...........12
3.1.4 PC-DECT 應用單元.............13
3.2雙方通話服務.....................15
3.2.1 功能介紹......................15
3.2.2 實作想法與考量................18
3.2.3 實作流程......................19
3.3來電轉接服務.....................22
3.3.1 功能介紹......................22
3.3.2 實作想法與考量................22
3.3.3 實作流程......................23
3.4話中插話服務.....................28
3.4.1 功能介紹......................28
3.4.2實作想法與考量.................28
3.4.3 實作流程......................28
第四章 電信服務軟體測量與討論.......31
4.1 測量方法........................31
4.2 電信服務測量....................31
4.2.1雙方通話電信服務測量...........31
4.2.2話中插話電信服務測量...........35
4.2.3來電轉接電信服務測量...........37
第五章 系統性能測試分析.............39
5.1 PC-DEC虛擬平台建置..............39
5.2 系統性能測試....................40
5.2.1 通話建立流程量測..............40
5.2.2 通話連線用戶量測量............43
5.2.3 用戶上線率測量................46
第六章 結論.........................50
附錄A...............................51
附錄B...............................56
REFERENCE...........................59

Reference
[1] WINCOMM, PC-DECT User Manual version 1.0, WINCOMM Corporation, Jan. 2000.
[2] ETSI, EN 300 444 V1.3.3,Digital Enhanced Cordless Telecommunications (DECT); Generic Access Profile (GAP),May 1999.
[3] ETSI, EN 300 175-5 V1.3.3,Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 5: Network (NWK) layer, May 1999.
[4] ETSI, EN 300 175-1 V1.3.3,Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 1: Overview r, May 1999.
[5] Berman, R.K.; Brewster, J.H., “Perspectives on the AIN architecture”, IEEE Communications Magazine , Volume: 30 Issue: 2 , Feb. 1992
[6] Aitken, D.J., “Experiences of implementation using advanced intelligent network release 1 architecture”, Software Engineering for Telecommunication Systems and Services, 1992., Eighth International Conference on, 1992
[7] Garrahan, J.J.; Russo, P.A.; Kitami, K.; Kung, R., “Intelligent network overview”, IEEE Communications Magazine , Volume: 31 Issue: 3 , March 1993
[8] Su Sen; Yang Fangchun; Chen Junliang, “An intelligent network architecture based on active network technology”, Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on , Volume: 2 , 2000
[9] John G. van Bosse, “Signaling in Telecommunication Networks”, WILLEY series in telecommunications and signal precessing.
[10] 蘇暉凱, “POTS/DECT信令服務於網際網路之實作”,中正大學電機所畢業論文,2001
[11] 楊舜仁, “交換機模擬器之製作”,交通大學電機所畢業論文,1988
[12] 湯鴻沼,“智慧型網路及其服務簡介”, 全華科技圖書股份有限公司.
[13] “PC-DECT教學平台使用說明手冊”, 中美萬泰科技股份有限公司.