用户名: 密码: 验证码:
UMS中邮件服务器研究
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
统一消息服务系统(简称UMS,也即Unified Messaging System)是近年来发展起来的一种新型服务系统。它能够将现有各种通信网络所提供的服务进行集成,并能为使用相同或不同网络终端的用户提供信息交流服务。不同UMS消息以一个统一的格式(邮件格式)储存,UMS将根据用户预定的服务通知消息的接收者。例如,一个新邮件到达时,UMS可能自动拔电话用户有一个邮件到达或者转换文本消息成语音,读出这个消息给用户听。
     本文以作者参与中鸿讯统一消息服务系统(ZHX-UMS)样机系统的研究与开发工作为基础,论述了统一消息服务系统的体系结构与关键技术,并在参与相关系统的总体设计的基础上,重点讨论了UMS系统的核心模块--UMS中邮件服务器的设计及其中关键子模块的实现过程。
     文中设计的ZHX-UMS是一个三层系统,最外层(C层—通信层)处理UMS和外部通信世界的I/O问题;最内层(K层—核心层)负责内部的消息管理和消息存储;中间层(A层—辅助层)处理C层与K层之间的通信及消息格式转换。UMS邮件服务器是系统三层体系结构中K层的核心模块,在K层协议机驱动下完成存储、转发及管理等任务。它与普通的邮件服务器相比,具备更强大的处理、管理以及与UMS其它各部分协调工作的能力,而且自主开发的邮件服务器模块为计费模块以及UMS统一服务功能的实现提供了方便的开发接口,因此UMS邮件服务器的实现是整个系统实现的关键。
     目前的ZHX-UMS还只是一个试验样机系统,系统本身还有待改进和优化,但该项工作已经为后期的开发和产品化奠定了良好的基础。
In the past few years,a new messaging system called the UMS (Unified Messaging System) has come into view. The UMS contrasts with the traditional medium-dependant messaging systems,and provides users with an integrated service. As a result,users with different communication terminals can share the same service disregarding the terminal at hand. Messages received from different UMS senders are stored in a unified form (e-mail) and message receivers will be informed as soon as possible according to their service pre-subscribed. For example,the arrival of an e-mail might result in an auto telephone call,either to tell the receiver there is an e-mail for him,or better still translate the text into oral language and read it to the e-mail receiver.
    Based on the research and implementation on ZHX-UMS,the paper mainly describes the key techniques and typical architectures of UMS. A special emphasis has been given to the UMS Mail server. In the dissertation,detailed discussion on the I/O module of the mail server has been given and some program modules are also provided in order to explain the implementation issues.
    The ZHX-UMS proposed in the paper has been designed as a three-layer system. The outmost layer (C-layer - Communication layer) deals with I/O issues between the UMS and outside communication world;the inner most layer (K-layer,kernel layer) involves internal management and message storage;while the middle layer (A-layer - Auxiliary layer) plays the go-between function between layers C and K. As the core component in layer K,the UMS mail server is responsible for the storage,transmission and management of the system driven by the layer-K state machine. By comparison with traditional mail servers,it must possess not only more powerful processing and managing capabilities but also the abilities of working with other components of UMS in harmony. Self-implemented mail server provides convenient interfaces for the billing module and other service functions in UMS. So the Mail Server plays a key role in the whole system.
    Although ZHX-UMS is only a sample system presently and still under improvement,it lays a good foundation for the future implementation.
引文
[1]韩智勇、曾华燊、程常清,中鸿讯统一消息系统设计框架,计算机科学28(6.增刊)2001
    [2]程常清、曾华燊、韩智勇,统一消息服务系统纵览 计算机科学 28(6.增刊)2001
    [3]曾华燊等 《中鸿讯统一消息系统初步设计》 中鸿讯信息技术公司2001.3
    [4]娄倩、曾华桑中鸿讯统一消息服务系统关键协议设计 计算机科学28(6.增刊)2001
    [5]马严,计算机互联网技术及其演进,北京邮电大学出版社,1999
    [6]宋灼焰四川省地税办公自动化系统设计与实现 西南交大硕士论文,2001
    [7]石岩 蒋东兴,“计费邮件服务器研究与实现”计算机工程与应用,1998.12
    [8]MizumoriRogerK,方蜀州、赵星月,X.400实用指南二电子邮件及互联网地址协议,北京电子工业出版社,1996.5
    [9]安德海、许榕生,Internet电子邮件系统设计与实现 第九届全国核电子学与核探测技术学术年会论文集,中国电子学会1998.9 p372~p376
    [10]Shirky, Clay;Series , The Internet E-Mail deluxe edition Clay Shirky, EmeryvilleZiff-Davis Press, 1997
    [11]孙玉冰,基于EMAIL AGENT 的INTRANET智能电子邮件系统 中国自动化学会,1999年中国智能自动化学术会议,重庆,1999.10,清华大学出版社,p867-p872
    [12]http://www, rfc-editor, org/rfc821 2002.2
    [13]http://pubweb, nexor, co. uk/public/rfc/index/rfe, html
    [14]谢希仁,《计算机网络》(第2版),电子工业出版社,1999
    [15]凌云志,qmail实用指南,中国电力出版社,2001
    [16]李科,E-mail—Internet实用指南,中南工业大学出版社,,1997.12
    [17]N. Borenstein, etc. MIME(multipurpose Internet Mail Extensions) Part One, http://www.ietf, org/rfc/rfc 1521.txt?number=1521,
    
    
    [18] J. Linn, Privacy Enhancement for Internet Electronic Mail,http://www. ietf. org/rfc/rfc1113. txt
    [19] D. Balenson, Privacy Enhancement for Internet Electronic Mail:Part Ⅲ: Algorithms, Modes, and Identifiers,http://www. ietf. org/rfc/rfc1423
    [20] 方忠、韩正之、沉彭年,”支持IMAP4的电子邮件程序的设计及实现”,计算机工程,2000.11
    [21] Kevin Johnson “Internet email协议开发指南” 2000
    [22] 廖里,“MAPI在多媒体电子邮件系统中的应用及实现”,电脑与信息技术2000.5
    [23] 赵军,“如何建立WEB方式的电子邮件系统”计算机与通信1998.5
    [24] 陈蔚等,“多媒体邮件系统的多线程实现“电信科学 2000.2
    [25] David Wood,"internet Email Program",中国电力出版社2001.10
    [26] 王家俊,“亲手创建Internet四大服务”人民邮电出版社 1999.12
    [27] 吕凤翥,“C++语言基础教程” 清华大学出版社 2002.2
    [28] Robert Guaraldi Jennifer Sides,"Exchange Server 5.5核心技术精解”中国水利水电出版社 1999.4
    [29] 北京义驰美迪技术开发有限责任公司,Lotus Notes R5邮件管理,海洋出版社,2000
    [30] 高传善,曹邦伟,网络基础与电子邮件,复旦大学出版社,1997.5
    [31] Moore, Jim, mail, files and directories, wordediting,formatting and printing and automatic bibliographies Jim Moore,RockvilleComputer Science Press, 1999
    [32] R.E. Kahn , Electronic mail and message systems;technical and policy perthe future of connunications, ArlingtonAFIPS, 1997
    [33] (美)RennieCindy,甄为华、王普才,ccMAIL实用指南,电子工业出版社,1996.2
    [34] Microsoft Corporation,Exchange server 2000企业网规划与架设科学出版社,2001.2
    [35] maikebi、McBeeJim,谭海平,高效配置与管理Exchange Server 5.5
    
    电子工业出版社,2000.4
    [36] 美国微软公司、北京华中兴业科技发展有限公司,Microsoft Exchange Server 5.5管理员手册,人民邮电出版社,2000.5
    [37] Microsoft Corporation, Exchange server 2000高级开发指南,科学出版社,2001.2
    [38] David H. Crocker, standard for the format of arpa internettext messages, http://www, ietf. org/rfc/rfc0822, txt?number=822
    [39] K. Moore, MIME (Multipurpose Internet Mail Extensions) Part Two, http://www, ietf. org/rfc/rfc1522, txt?number=1522
    [40] Dale Rogerson“COM技术内幕——微软组件对象模型” 1999
    [41] S. Kent, Privacy Enhancement for Internet Electronic Mail:Part Ⅱ: Certificate-Based Key Management,http://www, ietf. org/rfc/rfc1422
    [42] http;//sunsite. auc. dk/RFC
    [43] RFC1734, POP3AUTHenticationCommand,http://www, ietf. org/rfc/rfc 1734
    [44] RFC1891, SMTP Service Extension for Delivery Status Notifications, http://www, ietf. org/rfc/rfc1891
    [45] "RPC and WINDOWS Networks" Microsoft press. 1999
    [46] 李锋,“LAN和呼叫中心“ CTI世界 2000.4
    [47] 熊桂喜 译,《计算机网络》(第3版),清华大学出版社,1999。
    [48] :Microsoft Corporation、东方人华,Microsoft Exchange 2000 Server资源大全,清华大学出版社,2001.7
    [49] (美)Madron,Thomas Wm;陈石,UUCP与E-Mail网络组建=:DOS、Windows、Mac与Unix系统集成,电子工业出版社,,1997.4
    [50] RetanaAlvaro,希望图书创作室,网络核心技术内幕:专业IP网络规划与设计,北京:北京希望电子出版社:北京希望电脑公司,2000
    [51] 陈洛资,计算机网络软件设计、开发与编程,科学出版社,1994.7
    [52] 希望图书创作室,网络核心技术内幕:Cisco网络安全解决方案,北京希望电子出版社,2000
    [53] Redmill, F. J, Dependability of critical computer systems, London and NewElsevier Applied Science, 1988
    
    
    [54] 林闯 计算机网络和计算机系统的性能评价 清华大学出版社,2001.4
    [55] Stallings ComputerOrganization and ArchitectureDesigning for Performance Pearson Education 2001
    [56] 张军多媒体电子邮件客户系统 太原理工大学硕士论文,1998
    [57] J. Myers, Post Office Protocol-Version 3,http://www, ietf. org/rfc/rfc1725
    [58] B. Kaliski, Privacy Enhancement for Internet Electronic Mail:Part Ⅳ: Key Certification and Related Services,http://www, ietf. org/rfc/rfc1424
    [59] 桑维 基于过滤的安全电子邮件系统 哈尔滨工业大学硕士论文,2001
    [60] 陈伟 密码技术在电子邮件安全中的应用 西南交大硕士论文2001
    [61] 肖鹰 可编程网络代理服务器的研究 西南交大硕士论文,2001

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700