【作者】 陈永翾；

【导师】 陈向东；

【作者基本信息】 西南交通大学 ， 计算机应用技术， 2006， 硕士

【摘要】 目前,全球的移动通信技术飞速发展,新技术、新标准以前所未有的速度,越来越短的更新周期改变着人们的生活,其中无绳通信的研究更为引人注目。无绳通信早期被称为无绳电话,但是新一代的数字无绳技术不但能提供话音业务,还能提供多种非话音业务,因此发展成为无绳通信。 数字增强无绳通信(DECT)系统是由欧洲电信标准协会(ETSI)制定的增强型数字无绳电话标准,是一个开放型的,不断演进的标准。可为高用户密度,小范围通信提供话音和数据高质量服务无绳通信的框架。该标准的目标是使不同来源的设备间实现互操作,提供给用户一整套包括语音、数据等基本业务及选择性扩展的电信业务,并在可广泛推广的价格上支持多种应用。 本文对DECT协议进行了详细分析和研究,尤其是对其的空中接口规范进行了详细的探讨。在对DECT协议进行详细的探讨基础上,根据DECT的协议模型,制定了时分双工的通信协议方案。该通信协议方案主要参照DECT的协议模型的层次划分结构和信令交互模式,分别对空中接口、物理层、媒体访问控制层、数据链路层和网络层进行定义,形成了比较完整的通信协议方案。 在制定了通信协议后,提出了一种无线语音接入系统的整体方案,运用廉价的混合信号处理器、数字语音处理模块及无线数传模块设计了通信终端,并在通信终端上进行通信方案可行性研究。实现了无线语音时分双工通信,移动终端可以通过固定终端呼叫PSTN内的电话并进行通话。更多还原

【Abstract】 Today global mobile communication techniques are developing rapidly. New techniques and new standards are changing people’s life style in an unprecedented speed and shorter renewing cycle. Among them, cordless telecommunication is especially noticeable. Cordless telecommunication used to be called as cordless telephone. The new generation of digital cordless technique can provide not only voice service, but also variety of non-voice related services. Therefore, cordless telephone is called cordless telecommunication now.Digital Enhanced Cordless Telecommunication (DECT) standard, which was instituted by European Telecommunications Standards Institute (ETSI), is an open and continuously evolving standard. DECT standard sets a cordless telecommunication framework for providing high quality voice and data services to a short distance area with high density of user. The standard aims to achieve mutual operation of equipments from different sources, provide a set of basic and advanced telecommunication services, and support multiple applications in a reasonable price.The thesis has done a detailed analysis and research on DECT protocol, particularly the Aerial Interface criterion, and formulated the Time Division Duplex communication protocol scheme based on DECT protocol model. The Time Division Duplex communication protocol scheme defined Aerial Interface, Physical layer, Medium Accessing Control layer, Data Link layer and Network layer by mainly referring to the DECT layer divide and command alternant model, and therefore is an integrated communication protocol scheme.The article further put forward a wireless voice access system scheme and designed a communication terminal by applying inexpensive Mixed Signal Processor, digital voice process module and digital wireless transmit module. At last, the article did communication protocol feasibility study on the communication terminal. At the end, implement the TDD wireless communication ,and the Portabel Termination can communite with the phone in the PSTN by the fixed Termination.更多还原