ATM热方兴未艾

本文介绍了ＡＴＭ（不传输模式）的当前发展势态，描述了ＡＴＭ新一代网络技术的优点及特性，以及ＡＴＭ的标准制订、推广应用情况，并论述了ＡＴＭ近几年内仍将与传统型网络技术综合存在的态势；ＡＴＭ网络技术乃是当今的主流发展方向。     

ATM网络技术及其应用

本文介绍ＡＴＭ网络的参考模型、技术特点、交换技术和互联技术，并阐述了ＡＴＭ网络的应用前景。     

ATM：基于转接技术的未来网络

该文介绍了ＡＴＭ网络，从技术的角度重点讨论了ＡＴＭ的核心－转接器技术，包括其基本结构和分类，剖析了两种典型的转接器结构，同时涉及了ＡＴＭ网络走向商业化存在的问题，指出了对于这样一个未来网络在现实中所应采取的态度。     

ClassicalIP OverATM规范（下）

ＡＴＭ技术是目前最受人目的高速网络技术之一，而如何使ＡＴＭ网络与现有的国议相结合是ＡＴＭ技术发展的关键性问题。     

Classical IP Over ATM规范（上）

ＡＴＭ（异步传输模式）技术是目前最受人瞩目的高速网络技术之一，如何使ＡＴＭ网络与现有的网络协议（如ＴＣＰ／ＩＰ）相结合是ＡＴＭ技术发展的关键性问题。本文通过对比分析了在ＡＴＭ局域网与传统局域网上ＩＰ协议实现的异同，并较为深入地介绍了在ＡＴＭ上运行ＴＣＰ／ＩＰ协议的技术方案。     

ATM UNI信令协议的研究

ＡＴＭ技术是一种基于连接的网络技术。网络中任何两点在交换信息之前，都必须建立相应的虚连接。ＡＴＭ ＵＮＩ信令协议是研究ＡＴＭ网络的端节点和交换机之间建立，维护，释放，管理虚连接的协议规范。     

用于ATM网络带宽及流量管理的闭环流量控制技术及其实现

闭环流量控制技术是ＡＢＲ业务规范的重要组成部分，这项技术的实现可改善ＡＴＭ网络的拥塞状况，提高ＡＴＭ网络的带宽利用率，从而充分挖掘ＡＴＭ技术的巨大潜力。本文就 一技术进行较为详细的阐述，并分别介绍了在三种具体的实现方案。     

一种新的高性能网络——异步传输模式局域网

本文论述了把异步传输模式（ＡＴＭ）引入到局域网（ＬＡＮ）的必要性和应用前景，提出了如何构成ＡＴＭＬＡＮ和用软硬件来设计ＡＴＭＬＡＮ的机理与方法，对ＡＴＭＬＡＮ的基本概念，协议模型，互连技术，体系结构和网络样式进行了探讨，其目的是推动ＡＴＭＬＡＮ在我国的研究发展和应用。     

关于“ATM论坛”

异步传输模式（ＡＴＭ）是未来宽带网络的核心技术，作为ＡＴＭ技术标准制定组织之一的ＡＴＭ论坛，其作用也日益举足轻重。ＡＴＭ论坛成立于１９９１年１０月，是一个全球性的非盈利性的民间标准组织，其宗旨是促进ＡＴＭ技术在业界和终端用户通信领域的发展。自１９９１...     

ATM技术及其一个有效的通信控制方法

ＡＴＭ是一种具有革命性的新网络体制，它不仅能满足现有网络的各种需求，而且还具有视频和声音的附加能力和特性。ＡＴＭ通过对连网作了以下本质上的改变，从而解决了传统连网技术所存在的问题。     

一种利用ABR业务保证多媒体传输基本质量的方法

在ATM网络中利用可用比特率(ABR)业务支持多媒体传输具有流量管理上的优势.该文提出了利用可用比特率(ABR)业务保证多媒体通讯基本服务质量的机制,并给出相应的支持算法.     

无线ATM通信网的越区切换控制

论文研究无线ATM通信网的越区切换控制问题,提出不同的业务类型应采用不同的切换控制方法,从而使多媒体业务的服务质量(QoS)在越区切换时仍然可以得到保证。文中着重讨论了由于无线ATM通信的特点所引起的路由重建、QoS的保证与协商,信元次序的保证等关键问题,并提出了相应的解决办法。     

QRTP: A Middleware for Broadband Networks

Broadband networks, such as those based on Asynchronous Transfer Mode (ATM), provide large bandwidth and multiple services. An essential application area for broadband networks is multimedia systems. The development of multimedia applications, however, is currently lagging behind the advances in the network technology. Our approach to the problem of more effectively developing multimedia applications is to provide developers with a middleware that encompasses a set of broadband-specific services needed by multimedia applications, for instance virtual connection setup, bandwidth reservation and session synchronization. Our middleware, called the Queen's Real-time Transport Protocol (QRTP), is based on the Real-time Transport Protocol standard from the Internet Engineering Task Force. The paper discuses the design, implementation and evaluation of the QRTP middleware.     

Video transport in ATM networks: a systems view

This paper presents a systems view of video transport issues in asynchronous transfer mode (ATM) networks. Since video is a critical component of future distributed multimedia applications, we consider technical approaches necessary to realize a flexible, robust, and efficient ATM framework for video delivery. The overall system-design problem is discussed for a general distributed multimedia computing scenario, and key video-related design issues are identified. This is followed by a more detailed discussion of selected ATM video topics, including: (1) variable bit-rate (VBR) statistical multiplexing and dynamic usage parameter control (VBR+), (2) ATM cell-loss concealment in MPEG decoders, and (3) new transport protocols (“MTP”) for video and multimedia. Supporting simulation or experimental results from ongoing research are given where available.     

使用简单缓冲管理和选择性丢弃增加ATM／B—ISDN的吞吐量的算法

首先介绍了ＡＲＱ这两种差错控制策略的基本思想,然后从ＡＴＭ网络通信的性质和特点出发,提出ＦＥＣ策略能更好地适应目前日益广泛的多媒体应用,并介绍了一种提高ＦＥＣ性能的守门员加看门人算法。     

Overview of ATM networks: functions and procedures

The purpose of this paper is to present an overview of the ATM technique. The basic principles of the ATM transfer technique, the B-ISDN layered protocol reference model, as well as the architecture and the main functions of the ATM network, are described in this tutorial. In particular, we present the main characteristics of the ATM technique, the structure of the ATM cell, the functions which deal with the protection from errored cells (HEC procedure) and the identification of the boundaries of the ATM cells (cell delineation and scrambling). The VP/VC concept is explained in detail, and the main principles and functions of the three lowest layers (Physical, ATM and Adaptation) of the B-ISDN layered protocol reference model are surveyed. The issue of Quality of Service parameters in ATM networks is reviewed, and the problem of the allocation of the network resources in response to user demands, as well as the problems of congestion control, Usage Parameter Control (UPC) and traffic modelling in ATM networks, are assessed. Finally, we present ‘possible’ sets of traffic characterization parameters, and show how possible B-ISDN sources can be modelled according to the basic on-off ATM traffic source model.     

The Washington University multimedia system

The Washington University multimedia system (MMS) is a complete multimedia system capable of transmitting and receiving JPEG-compressed video, CD-quality audio, and high-resolution radiological images, in addition to normal network traffic, over the Washington University broadband ATM network. The MMS consists of an ATMizer and three multimedia subsystems. The ATMizer implements the host interface, the interface to the ATM network, and the interface to the three multimedia subsystems. This paper describes the architecture of the MMS, the software used with the system, and the applications which have been developed to demonstrate the capability and applicability of broadband ATM networks for multimedia applications.     

Broadband MPEG-2 Client with Network Configuration Capability

MPEG-2 is a standard for high quality-content compression and data delivery used in digital television and DVD. MPEG-2 is computationally complex but recently it has become possible to perform MPEG-2 decoding in software using multimedia instruction sets of modern microprocessors. This is an important step for the convergence of computers with television and entertainment. In this paper we describe operation and performance of a broadband video client which is MPEG-2 transport stream decoder with network interfaces, implemented on Sun UltraSparc processor using VIS multimedia instruction set. The decoder performs demultiplexing, synchronized video and audio decompression and display in realtime. It is implemented as a Netscape plug-in and it has flexible network interface allowing to configure it for different broadband networks which might be available: ATM PVC, SVC, IP over ATM and Fast Ethernet. Implementation of the decoder in multithreaded and multiprocessing environment is studied. Experimental data regarding the performance of the decoder in different conditions are presented and basing on them conclusions for the processing power requirements are formulated.     

ATM网多媒体业务传输中的前向纠错研究

与传统的闭环纠错技术相比 ,前向纠错技术 (FEC)更适用于 ATM网多媒体业务传输 .本文对几种主要的FEC机制进行了定性分析 ,得到了评价其性能的参数并进行了比较 ;深入探讨了纠错所在层次的问题 ,对信元级 FEC和包级FEC的性能进行了分析和比较 ,得到了一些重要结论 .本文的研究对 ATM网多媒体业务传输研究具有指导意义     

ATM战术网研究与发展

下一代的战术网（Ｔａｃｔｉｃａｌ Ｎｅｔｗｏｒｋｓ）是基于ＡＴＭ技术的。本文指出了把ＡＴＭ技术应用到战术环境中面临的主要问题;介绍了ＡＴＭ战术网及其典型范例ＰＯＳＴ－２０００;分析了无线ＡＴＭ协议体系,把ＡＴＭ战术网与无线ＡＴＭ进行比较;通过ＡＴＮＥＴ工程分析了未解决的问题和研究方向;展望了ＡＴＭ战术网的发展。