接入型ATM交换机中局域网仿真系统的研制

接入型ＡＴＭ交换机广泛应用于校园网或企业网等专网环境中，因而支持局域网数据通信业务是其应具备的主要功能之一。ＡＴＭ论坛提出的局域网仿真技术是目前广泛采用的一种利用ＡＴＭ网络支持数据通信业务的方式。     

一种MPOA边缘设备的研制

ＡＴＭ Ｆｏｒｕｍ提出的局域网仿真（ＬＡＮＥ）技术是一种将传统局域网接入到ＡＴＭ网络的重要方法,以ＬＡＮＥ为基础的ＭＰＯＡ将使ＡＴＭ真正进入企业网,本文提出一种ＭＰＯＡ边缘设备的方案,已经实现了局域网仿真网桥的功能,并且达到了很高的性能。     

局域网接入ATM网技术（二）

局域网接入ＡＴＭ网是信界最热门的技术之一。如何既享受ＡＴＭ的高带宽，又保留局域网现有的协议层次，从而保护用户投资，是一个很吸引人的技术问题ＩＰ Ｏｖｅｒ ＡＴＭ（ＩＰＯＡ），局域网仿真（ＬＡＮ Ｅｍｕｌａｔｉｏｎ）以及Ｍｕｌｔｉ－Ｐｒｏｔｏｃｏｌ Ｏｖｅｒ ＡＴＭ（ＭＰＯＡ）是局域网接入ＡＴＭ的三种最流行的技术规范。其中，局域网仿真和ＭＰＯＡ适用范围广，可以接入各种网络层协议。这里对局域网仿真和Ｍ     

局域网接入ATM网技术（三）

局域网接入ＡＴＭ网是通信界最热门的技术之一。如何既享受ＡＴＭ的高带宽，又保留局域网现有的协议层次，从而保护用户投资，是一个很吸引人的技术问题，ＩＰＯＶｅｒＡＴＭ（ＩＰＯＡ）、局域网仿真以及Ｍｏｕｌｔｉ－ＰｒｏｔｏｃｌｏＯｖｅｒＡＴＭ（ＭＰＯＡ）是局域网接入ＡＴＭ的三种最流行的技术规范。其中，局域网仿真和ＭＰＯＡ适用范围广，可以接入各种网络层协议。这里对局域网仿真和ＭＰＯＡ这两种技术的原理、通信规程     

局域网仿技术及其在接入型ATM交换机中的实现研究

ＡＴＭ局域网仿真技术是由ＡＴＭ论坛提出的一种利用ＡＴＭ网络支持数据通信业务的方法，而接入型ＡＴＭ交换机则是实现方诉一种理想平台。     

局域网仿真技术的发展

介绍了一种传统局域网接入异步转移模式（ＡＴＭ）网中广泛使用的技术——局域网仿真（ＬＡＮＥ）,从ＬＡＮＥ的基本思想、ＬＡＮＥ１．０和ＬＡＮＥ２．０三个方面进行了论述。说明ＬＡＮＥ既可以保护现有局域网的资源,又能享受ＡＴＭ的高带宽优势,是一种具有生命力的技术。     

ATM环境下计算机网络的互连

论述了宽带综合业务数字网（Ｂ－ＩＳＤＮ）的公用网提供无连接服务的接入方案：漳接接入和直接接入，以及现行计算机通信协议与异步转移模式（ＡＴＭ）的相互配合；简要介绍了目前流行的局域网（ＬＡＮ）仿真技术。     

ATM在局域网互连中的应用

0　引言尽管起初ＡＴＭ是被用做广域通信的转移机制 ,但由于ＡＴＭ具有灵活性强、适应性强、能有效利用资源、迅速增长带宽等显著特点。ＡＴＭ技术在局域网上也做为一种有效的手段来解决局域网结构若干技术问题 ,它不仅能提供ＬＡＮ跟用户间的高速交换通路 ,将现有网络速度提高 1- 2个数量级 ,还可为ＬＡＮ和采用ＡＴＭ技术的城域网 (ＭＡＮ)、广域网 (ＷＡＮ)提供无缝连接。1　ＡＴＭ仿真局域网允许现有ＬＡＮ的用户和其它ＬＡＮ用户以及ＡＴＭ网上的服务器、路由器、网桥等实现互通、互连及互操作 ,原有ＬＡＮ终端的硬件和软件无需做任何…     

卫星ATM宽带网络的结构和协议

卫星ＡＴＭ网本质上是一种新型的宽带卫星通信系统，具有宽带、高比特率、能满足多媒体业务需求以及可灵活分配带宽等特点。实现它要解决的主要问题是卫星通信网与ＡＴＭ网的互连互通。网络实体包括网关、网络控制站及卫星等；设计中要考虑轨和频段选择、是否采用星上交换和处理、对移动性的支持以及卫星是用于接入还是互联等因素，其网络协议主要包括ＡＴＭ信元封装和定义Ｓ－ＡＴＭ协议层两种方案。     

宽带网业务发展前景

９０年代初,ＡＴＭ网络在国外开始出现。近几年来,国内也相继建成了ＡＴＭ网络,或以ＡＴＭ为核心的帧中继网。１９９５年上海建立了宽带试验网,主要进行影视点播、会议电视、校园网互连、ＡＤＳＬ的高速数据接入、远程教学、远程医疗等试验。１９９８年上海市邮电管理局又建成了上海帧中继网（又称上海宽带网）,该网以ＡＴＭ交换机为核心节点,边缘节点可提供各种业务的接入。另外,江苏省。山东省、浙江省、福建省、北京、广州等地也先后建成了宽带网。一、宽带ＡＴＭ网业务现有ＡＴＭ网上的应用主要为传统业务（ＡＴＭ／ＦＲ的ＰＶＣ…     

Flight of the FALCON [ATM]

The fabric-based ATM oriented local connectivity (FALCON), an ATM-based customer premises network (CPN), is described. FALCON supports access using traditional local area networks (LANs) such as Ethernet and token rings and supports a LAN emulation mode for its native ATM interface. This service allows a set of terminals, workstations, and servers to connect to the switch-based network and to interact as if they were attached to a traditional LAN. FALCON's backbone structure is based exclusively on ATM technology, all following CCITT or industry standards wherever they apply. The FALCON control structure is outlined     

Wireless ATM—an overview

This paper sketches the requirements and possibilities of wireless ATM in local area networks. Because of the wide range of services supported by ATM networks, ATM technology is expected to become the dominant networking technology in the medium term for both public infrastructure networks and for local area networks. ATM infrastructure can support all types of services, from time-sensitive voice communications and desk-top multi-media conferencing, to bursty transaction processing and LAN traffic. Extending the ATM infrastructure with a wireless access mechanism meets the needs of those users and customers that want a unified, end-to-end networking infrastructure with high-performance, consistent service characteristics. The paper introduces ATM concepts, discusses the requirements for wireless ATM, in particular for data link control and radio functions. It closes with some notes on development of wireless ATM research systems standardization and spectrum allocations.     

Data communication in ATM networks

An increasing number of customers require LAN access with high bandwidth and low delay over long distances. To satisfy these needs, several high-speed network techniques have been developed. Asynchronous transfer mode (ATM) is superior compared to other networking technologies, as it offers high bandwidth and is scalable in the sense that the bandwidth capacity of an ATM system is not fundamentally limited to the technology itself. Initial ATM installations will operate as subnetworks of existing networks and MAC layer protocols. One of the main challenges in ATM is the transparent support of existing connectionless LAN services. Several activities have been launched within international standard bodies and forums to specify ways of providing data communication services over ATM. Most notable examples are Switched Multimegabit Data Service (SMDS) and the similar Connectionless Broadband Data Service (CBDS) supported mostly by public network service providers. But also other approaches such as IP over ATM, and LAN emulation that show more adherence to the existing local and campus area networking paradigms. The article presents the requirements and architecture of the LAN emulation service. It describes the alternative methods for carrying IP packets over ATM, a public broadband service architecture and CBDS. The traffic management aspects of the data communication services are also discussed     

ATM local area networks: a survey of requirements, architectures,and standards

There is increasing interest in deploying ATM technology in local or campus networks. ATM is an ideal technology to overcome many of the limitations of today's LAN technologies. This article focuses on the application of ATM in the LAN environment to interconnect high-end host computers, and on the interworking of ATM-based LANs with legacy LANs. The authors introduce ATM LAN requirements, followed by a discussion of possible ATM LAN architectures to support these requirements. The article then covers current standards and their relation to the possible architectures, and concludes with a discussion of current ATM LAN issues and directions     

ATM local area networks

LAN emulation offers a best-effort, connectionless, packet transfer service at the MAC sublayer, implemented on top of a connection-oriented ATM network LAN emulation using switched virtual connections requires address resolution to locate the destination end station followed by connection establishment to the resulting ATM address. Address resolution may be implemented by a broadcast technique or by an address server. The broadcast method is the simplest for small networks but a combination of both is probably better. The use of the MAC address to identify an end station, with dynamic binding to its current physical location in the ATM network, allows the ATM LAN segment to be viewed as a virtual LAN. The virtual LAN model permits end stations to move and change physical location while maintaining connection to the same ATM LAN segment. This greatly simplifies the management of large data networks     

在ATM网上实现局域网功能的困难及对策

ＡＴＭ网络作为下一代网络，终将成为网络的主流。但是ＡＴＭ网在目前传统局域网占主导对位的环境条下成为今后的主流和局长的方向，就必须解决二个问题；首先，必须使已有的众多的网络应用软件能在ＡＴＭ工作站上使用；第二，ＡＴＭ网应能很和传统的局 连在一起的工作站一起运作。本文介绍了在ＡＴＭ网上实现局域网功能所面临的困难及一些可能的解决方案。     

在ATM网上实现局域网功能的困难及对策

ＡＴＭ网络作为下一代网络，终装成为网络的主流。但量ＡＴＭ网要在目前传统局域网点主导地位的环境下成为今后的主流和发展的方向，就必须解决二个问题；首先必须使已有的众多的网络应用软件能在ＡＴＭ工作站上使用；第二，ＡＴＭ网应能很容易和传统的局域网连在一起的工作站一起动作。     

ATM infrared wireless LANs: a proposed architecture

As infrared wireless LANs for in-building applications become more popular because of their many advantages, it is of interest to design such LANs to support the ATM protocol and therefore provide wireless access to fixed ATM networks. The architecture of such a LAN is presented in this article. Emphasis is placed on the protocol stacks of the model to provide seamless operation with the wired network, on the cellular topology, and on the MAC protocol. Under the proposed topology the system performance is revealed in terms of packet dropping probability, average access delay, channel throughput, and statistical multiplexing gain for a range of system parameters     

ATM网络上的LAN仿真技术

本文比较ＡＴＭ网络和ＬＡＮ的区别。对ＡＴＭ局域网技术作了论述，内容包括ＡＴＭＬＡＮ仿真的组成、工作原理及其特点。     

Wireless ATM network architectures

Emulated LAN technology supports mobile hosts in wireless ATM networks. This paper introduces virtual LAN (VLAN) services using ATM LAN emulation technology which operates on a client/server model. One of the attractive features of the VLAN is the capability to group users into a broadcast domain. The focus of this paper is the issue of supporting quality of service to mobiles in a wireless ATM network. Copyright © 2001 John Wiley & Sons, Ltd.