PDA线务通的研究与实现

【作者】 张黎军；

【导师】 史浩山；

【作者基本信息】 西北工业大学 ， 通信与信息系统， 2003， 硕士

【摘要】 嵌入式系统的广泛应用，使其发展到了以网络为应用的第三代。网络时代如何使许多人缺乏PC或不熟悉计算机操作的用户登录网络已经成为一个热点问题。计算机技术的发展促进通讯系统和信息终端的智能化和网络化，尤其是嵌入式系统的应用，更为信息终端的发展提供了技术支持。 本文的主要研究内容是PDA线务通的设计与实现。线务通是通过电话线路与后台服务器进行通信的电信测试终端，主要用于电信维修人员；它的出现，填补了市场空白，使得电信维修人员与电信总部之间能够方便快捷的进行话音与数据通信。 PDA线务通将通话功能嵌入于PDA中，提出了在固定电话线路上实现类似移动通信中短消息(SMS)的方案，并且给出了利用FSK和DTMF方式传输PDA与服务器之间数据的方法，充分利用了电信资源，节省了接入费用。 本文在介绍PDA线务通总体结构的基础上，充分考虑到了嵌入式系统的特点和目前的最新技术发展动态，重点讨论了系统设计与实现过程中的几项关键技术：嵌入式数据库系统与嵌入式窗口系统：针对每一项技术，分别提出了相对于一般性解决方案的、适用于嵌入式系统中的方案和模型，并详细描述了这些模型和方案的设计与实现。 最后，本文总结了完成的工作，并提出了需要改进及完善之处。更多还原

【Abstract】 With the wildly application of the embedded system, it has been developed into the 3G era. It’s a hot focus how to make the common people log into the computer network easily and conveniently. The development of computer technology makes the communication system and information terminal more intelligent, especially the application of embedded system, which supports the technology for the development of the information termination.The main research content in the thesis is the design and realization of PDA Telecom Affair Transaction(PTAT). PTAT is a kind of telecom testing terminal used by telecom maintenance men; The appearance of PTAT fills up the blank of the market, which makes the communication between maintenance man and headquarters more convenient.PTAT realizes the call in PDA and brings forward the scheme of the SMS(short message service) which is similar with the mobile communication. It also transfers data by FSK and DTMF between PDA and servers, which fully makes use of telecom resources and saves the expenditure.In the basis of introducing the global architecture, the mostly discussed in the thesis is the embedded system architecture. With respect of its embedded environment, some of the key technologies, including embedded database system and embedded windows system.At the end of the essay, a summary of research on all aspects are given, along with hope of possible refine of further research.更多还原