交换技术的发展

介绍了复用技术与交换技术的演变，阐述了以ATM和IP为核心的宽带交换技术及未来的光交换和软交换技术。     

基于MPLS的网络服务质量分析

本文针对软交换网络服务质量中的分组丢失问题,研究了控制和业务相分离的软交换网络的体系结构,讨论了电信网络的演进趋势。论文从IP技术的角度,分析了分组丢失的原因以及以分组为对象和以网络为对象的解决方案,重点讨论了多协议标签技术对服务质量的保证措施,利用该技术解决服务质量可以保证网络良好的可靠性和安全性,系统开销也会很小。     

自动取款机纸币序列号图像采集装置的研制

自动取款机(简称ATM)纸币序列号图像的正确采集是ATM纸币序列号自动识别记录装置的关键.研制了一种ATM纸币序列号图像采集装置,包括纸币位置检测单元、纸币序列号图像采集单元、系统存储与控制单元.本论文的关键在于解决了ATM出钞过程中纸币序列号的图像实时采集问题.将所研制的纸币序列号图像采集装置安装在目前流通的一款ATM中,实际运行结果表明,所给出的纸币序列号图像采集方法与装置能够正确采集到纸币出钞过程中的纸币序列号图像,经过适当的参数调整,还可以应用于不同币种和面值、不同出钞速度的ATM中.     

网络新技术ATM及其应用

简介ＡＴＭ网络新技术的特点，基本原理，分层结构，基本技术及应用。     

ATM UNI信令的软件实现

介绍了在ＱＮＸ操作系统上实现ＡＴＭ ＵＮＩ信令（用户端功能）的设计思想和程序结构。     

第三层交换——IP交换技术的研究

讨论了第三层交换－ＩＰ交换的关键技术，分析比较了几种不同的ＩＰ交换技术，并指出了所存在的问题。     

基于ATM的多协议封装

介绍了３种基于ＡＴＭ的多协议封装的协议栈，对基于路由的及基于桥接的高层协议数据单元的封装格式进行了详细的分析。     

An ATM-Based Connection Management Architecture for Telecommunications Services

New open service architectures are now emerging.An important part of these architectures is theconnection management function. It enables theestablishment, control and release of semipermanentconnections requested by telecommunications services suchas virtual private networks. This paper presents thespecification, design and implementation of thisconnection management function in our OAMS Open Service Architecture. The proposed architecture isdeployed over a distributed processingenvironment.     

ATM案件的犯案手法及其技术防范

近年来,ATM案件时有发生,银行及其客户深受困扰和侵害,ATM营运安全成了全社会关注的焦点。总结分析不法分子犯案的主要手法和形式,对商业银行如何加强技术防范进行探讨,提出意见和建议。     

Access Protocols for Cellular High-Speed Data Services

In this contribution, novel access techniquesfor the future cellular information networks areproposed. To facilitate a fast deployment, the suggestedaccess techniques have been implemented over well-known technological platforms, namely DECT (DigitalEnhanced Cordless Telecommunications) containing aFDM/TDMA (Frequency Division Multiplex/Time DivisionMultiple Access) structure. Two situations areconsidered: i) no limits in the use of the all carriers atterminal (ideal case) and ii) maximum number ofcontiguous/simultaneous carriers at terminal (realisticcase). First, to grant a quick access channel, a random access mechanism with reservation is proposed.It is called contention-TDMA (C-TDMA). Next, in order tostudy the feasibility of better collision resolutionalgorithms for C-TDMA, a centralized approach called Centralized C-TDMA Demand Assignment(CC-TDMA-DA) has also been studied. For the ideal case,numerical results indicate that C-TDMA and CC-TDMA-DAyield similar throughput values in typical cellular scenarios. Also, CC-TDMA-DA tends to bepreferable for traffic sources with long messages andweak delay constraints, while C-TDMA performs better forbursty traffic sources with hard time requirements. Additional numerical results for the realisticcase have demonstrated that system performancedeteriorates little with respect to the ideal case interms of collisions, delays and throughputfigures.