宽带ISDN与ATM交换技术：第三讲 ATM交换技术

本文介绍了ＡＴＭ交换的基本原理，研究了ＡＴＭ交换结构的分类，并讨论了几种典型的ＡＴＭ交换网络，包括ＢＳＳ交换结构、Ｂｏｘａｎｎｅ交换单元和交换机构以及Ｂａｔｃｈｅｒ－Ｂａｎｙａｎ多级互连网络。     

分布式ATM交换系统

分布式ＡＴＭ交换系统提高ＡＴＭ网络的灵活性，本文研究了分布式ＡＴＭ交换系统的网络结构，各主要部件的功能及构成，并介绍了分布式ＡＴＭ交换系统的应用。     

ATM交换网络结构及其性能

ＡＴＭ交换技术是Ｂ－ＩＳＤＮ中的关键技术之一。ＡＴＭ交换网络作为ＡＴＭ交换机的核心部件，已经得到了广泛和深入的研究。本文从缓冲的概念出发，对各种单播ＡＴＭ交换网络的结构及其性能进行了全面的评述，并对不同缓冲结构ＡＴＭ交换网络的性能和实现复杂度进行了比较。     

ATM交换结构2—多级互连网络

ＡＴＭ交换结构是ＡＴＭ交换的关键技术之一，而多级互连网络以其优异特性在ＡＴＭ交换中是到广泛应用，本文介绍了ＭＩＮ的分类，拓攫结构，缓冲策略和控制机理。     

ATM交换结构及其特点

ＡＴＭ技术已被公认为下一代网络世界的核心技术，ＡＴＭ交换机是组成ＡＴＭ网络的关键部件。文章详细讨论了ＡＴＭ交换机的各种交换结构，比较它们的优缺点，提出一种修正的Ｂａｔｃｈｅｒ－ｂａｎｙａｎ交换结构。     

ATM光交换技术

本文介绍了两种典型光的ＡＴＭ信元交换结构，着重气导了国外最新进展，并讨论了其中的关键器件、技术，最后总结了ＡＴＭ光交换中尚待解决的问题及发展方向。     

光ATM交换技术异军突起

光ＡＴＭ交换是光交换网络和ＡＴＭ交换结构相结合而形成的一种颇具潜力的交换技术。本文分析了光ＡＴＭ技术产生的背景，描述基于使用超短光脉冲的广播－和－选择星形网络以及基于使用光矩阵交换的超正方体网络这两类信元交换结构，介绍了实现光ＡＴＭ交换的几项关键技术：超速信元产生、全光地址匹配和全光同步，探讨光交换技术未来的发展趋势和前景。     

模块化结构的ATM交换节点的性能分析

模块化结构是形成大容量ＡＴＭ交换节点的最有效手段，本文提出一种分析模块化结构的ＡＴＭ交换节点性能的新方法，该方法通过引入虚队列考虑了相邻模块间的相关性，与计算机模拟相比，分析结果在整个负载变化范围内都有很高的准确性，方法适用于任意大小模块并采用输出排队和以Ｂａｎｙａｎ网为互连网的ＡＴＭ交换节点的性能分析。     

宽带交换网的结构与性能

宽带综合业务数字网（Ｂ－ＩＳＤＮ）交换的核心是ＡＴＭ技术。本文分析内部无阻塞ＡＴＭ交换结构，并根据最大吞吐量、信元丢失率等性能得出结构的优劣。     

宽带交换网的结构与性能

宽带综合业务数字网（Ｂ—ＩＳＤＮ）交换技术的核心是ＡＴＭ技术。本文分析内部无阻塞ＡＴＭ交换结构，并根据最大吞吐量、信元丢失率等性能得出结构的优劣。     

Practical implementation and packaging technologies for alarge-scale ATM switching system

The practical implementation of a trial large-scale asynchronous transfer mode (ATM) switching system and its packaging technologies are described. The architecture of the ATM switching system is discussed with an emphasis on system scalability. A building block architecture in which switching capacity can be expanded in a modular fashion is introduced. The design of the ATM switching system, including the ATM switch element, is described. The implementation of the VLSIs for the ATM switch which realize a highly modular system is explained. Bit-slice techniques are effectively used to realize a high-speed switch element as a CMOS VLSI chipset. An edge-to-edge orthogonal packaging technique is also presented     

A scalable ATM switching system architecture

The architecture of an asynchronous transfer mode (ATM) switching system for prototype applications is presented. The general concept to upgrade the existing ISDN switch with an ATM module is introduced, and the building blocks of this ATM module are described in detail. Switching of ATM cells is performed in a single application-specific integrated circuit (ASIC). ASICs can be cascaded to form large switching modules. Peripheral modules interface the ATM switch to external transmission systems and perform all ATM-related functions, including means for redundancy of the switching network. The redundancy scheme tolerates single failures without affecting the user information. A switching network architecture is shown to be capable of fulfilling varying demands in terms of the number of ports for ATM switches and cross connects, concentrators, and multiplexers     

Traffic considerations for the design of ATM switch architectures

Traffic problems are the major issues of consideration in designing an appropriate ATM switching architecture for ATM networks. This paper considers the buffering techniques, quality of service and network performance issues that are important for the design of ATM switching fabrics.     

SDH光纤网和ATM交换机简述

简述Ｂ－ＩＳＤＮ的两大基础：ＳＤＨ光纤网和ＡＴＭ交换机的基本知识，前半部分是讲ＳＤＨ光纤网的由来、网络拓朴、信息负载与包络及双环结构与设备。后半部分是讲ＡＴＭ信元交换、ＡＴＭ适配层、信息业务类型。     

CLOS网络型大规模ATM交换结构

首先提出了大规模ＡＴＭ交换网络应满足的基本特性，然后对Ｃｌｏｓ网络型大规模ＡＴＭ交换网络进行了研究，给出了交换网络连接级呼叫的无阻塞条件，论述和分析了一种适合于以信元为单位的分散式路由选择算法。     

Experimentation on asynchronous switching techniques for broadband ISDN

This paper deals with a proposed implementation exploiting the new asynchronous transfer mode (ATM) multiplexing and switching techniques. In particular, the basic architectural and functional choices are outlined and various aspects are examined regarding the implementation of a switching arrangement using ATM switching techniques, giving some indication about its hardware and software architecture and the foreseeable system performance.     

ATM Optical Switching Technology

1IntroductionHigh-speedopticalnetworkcanbedesignedtousetransparentopticalswitchingofdata.PhotonicstechnologyisexpectedtoplayamajorroleinthedevelopmentoffuturebroadbandopticalinformationnetWorks.PacketswitchingandtheswitchingofAsynchronousTransferMode(ATM)cellbasedonphotonicshavesomeobviousadvantagesovertheirelectroniccounterparts,e.g.transparency,flexibility,cost-effective,broadband,high-speed,verylargecapacity,etc.InATMOS(ATMOpticalSwitching)system,switching'canbeaccomplishedinopticald…     

Experience with PACS in an ATM/Ethernet switched networkenvironment

Legacy local area network (LAN) technologies based on shared media concepts are not adequate for the growth of a large-scale picture archiving and communication system (PACS) in a client-server architecture. First, an asymmetric network load, due to the requests of a large number of PACS clients for only a few main servers, should be compensated by communication links to the servers with a higher bandwidth compared to the clients. Secondly, as the number of PACS nodes increases, the network throughput should not measurably cut production. These requirements can easily be fulfilled using switching technologies. Here asynchronous transfer mode (ATM) is clearly one of the hottest topics in networking because the ATM architecture provides integrated support for a variety of communication services, and it supports virtual networking. On the other hand, most of the imaging modalities are not yet ready for integration into a native ATM network. For a lot of nodes already joining an Ethernet, a cost-effective and pragmatic way to benefit from the switching concept would be a combined ATM/Ethernet switching environment. This incorporates an incremental migration strategy with the immediate benefits of high-speed, high-capacity ATM (for servers and high-sophisticated display workstations), while preserving elements of the existing network technologies. In addition, Ethernet switching instead of shared media Ethernet improves the performance considerably. The LAN emulation (LANE) specification by the ATM forum defines mechanisms that allow ATM networks to coexist with legacy systems using any data networking protocol. This paper points out the suitability of this network architecture in accordance with an appropriate system design     

雷达组网通信中的ATM交换机

介绍了ＡＴＭ交换技术在雷达组网通信中的应用。通过对基于中央处理站的雷达组网通信技术需求的分析，提出了一种类似于用户—服务器模式的ＡＴＭ交换结构。ＡＴＭ技术是Ｂ—ＩＳＤＮ的基础，ＡＴＭ交换技术是ＡＴＭ技术的核心，它不仅可用于民用通信业务，而且对于电子干扰环境下雷达网对密集多目标跟踪时所涉及的通信业务也很有效。文章对ＡＴＭ交换机在雷达网中的数据交换作了分析，并以计算机仿真手段评估了三种特定通信环境下输出缓冲型ＡＴＭ交换机的利用率和输出队列概率分布情况。     

A smart photonic ATM switch architecture with compression strategy

Generally, the limitations of optical delay line and link capacity limit the switching efficiency in the photonic asynchronous transfer mode (ATM) switch. Under the constraints, a smart photonic ATM switch designed for high-speed optical backbone network should have some fast switching strategies so that the congestion can be avoided or reduced. In this paper, we mill propose a novel smart photonic ATM switch architecture with a novel compression strategy. In the smart architecture, while more than two frames are destined for the same destination, the losers will be queued and compressed to reduce the degree of congestion. Therefore, not only the total switching time (TST) can be reduced but also the scarce buffer is able to store more incoming cells. To meet the high-speed switching performance, a simple and efficient compression decision algorithm (CDA) is proposed. The timing of employing compression strategy and the saturated performance of proposed strategy are analyzed. Simulation results show that compared to the conventional photonic ATM switch without compression strategy, the proposed strategy offers a much better performance in terms of queueing delay