TCP/IP与ATM的互联及网关功能的实现

由于IP和ATM各有自己的优势,因此.可以将两种技术融台起来,利用ATM网络为IP用户提供高速直达链路。本文主要讨论TCP/IP与ATM的互联,以及网关如何实现TCP/IP和ATM之间的协议转换。在此之前,首先简单介绍ATM的概念及分层模型,给出了IP和ATM结合的多种解决方式。     

DSLAM设备中IP接入模块的实现

针对目前普遍采用的DSLAM设备。提出了一种IP接入模块的设计方案和IP over ATM解决方案，实现了基于ATM架构的IP—DSLAM技术，既发挥了ATM的综合业务接入能力，又使得运营商能够利用现有的ATM设备开展IP业务。     

ATM与IP技术对比述评

介绍了ATM和IP技术的概念、特点及发展现状和背景,对这两种技术进行了分析对比,并提出了今后ATM和IP技术相互融合的发展走向。     

IP over ATM技术及其应用模式

说明了IP技术与ATM技术结合的必要性以及结合的优势,介绍了IP over ATM技术的原理及其应用模式,其中包括经典IP模式、捷径IP模式和集成IP模式,最后简要分析了IP over ATM技术的发展趋势。     

IP与ATM—从竞争到结合到向MPLS的发展

IP和ATM是由于不同的历史原因、基于不同服务理念而发展起来的两种主要数据通信技术。在过去的九十年代,两种技术经历了从激烈竞争到相互结合的历程。目前,由于Internet向更深层次发展而形成的对服务质量(QoS)的更高要求,使紧密融合了IP和ATM优点的MPLS技术倍受瞩目,也使IP和ATM在MPLS上找到了最佳的结合点。传统的IP路由器和ATM交换机最终将在MPLS旗下得到完美的统一。     

浅谈宽带IP城域网组网方式

1 宽带IP骨干核心网技术 目前,较成熟的宽带IP骨干核心网技术有IPOver ATM、IP Over SDH(POS)、IP Over Optical。IPOver ATM融合了IP和ATM技术特点,发挥ATM支持多业务、提供QoS(服务质量保证)的技术优势;     

IP over SDH和IP over ATM技术

随着Internet的快速发展,对广域网的带宽提出了更高的要求,目前在广域上采用的两种技术是IP over ATM和IP over SDH。本文简要介绍了SDH和ATM以及实现IP over ATM和IP over SDH所需的协议栈,着重比较了这两技术在协议开销,宽带管理,服务质量（QoS),寻址选路以及流量控制等技术。     

县级广电数据网的技术选型

列举了县级广电数据网的具体要求,作为技术选型的依据;同时分析比较了广电数据网3种代表性的技术模型(IP over ATM,IP over SDH,IP over Optical)的优缺点,建议ATM作为县级广电数据网的主干网.     

IP与ATM互连的三种技术及比较

本文在介绍了IP和ATM的基础上,重点分析了IP网接入ATM网的几种主要方式：IPOALANE、IP交换和MPOA,并将这几种方式进行了比较。由于IP网拥有广大的客户群,而ATM具有性能上的优势,所以如果能将二者很好地结合起来,形成优势互补,对推动网络技术的发展具有重要的意义。     

基于ATM技术的Internet网络工程

分析了现有 Internet网络中引入 ATM技术需要侧重研究的问题 ,介绍了几种正在试验和研究的 IP (Internetprotocol)在 ATM上的适配协议 ,基于 ATM的 IP数据报传输 ,MPOA(Multi Protocol Over ATM)协议等 ,及其各自的组网方式     

基于ATM的MPLS流量工程研究

研究了基于ATM的MPLS,重点研究和分析了具体实现MPLS流量工程的ATM流控措施、使用约束路由的标记分发协议、路由协议,为MPLS流量工程的具体实施提供了参考。同时研究了MPLS多协议标记交换技术融合IP路由技术、ATM的QoS（Quality of Service）及交换技术,使得流量工程模式可以部署在基于IP的网络,其中包括ATM网上承载IP业务的模式。     

基于光同步数字传输网的IP传送技术

对基于光同步数字传输网的IP传送技术(IPOverSDH)的内容和技术特点进行了较详细的介绍与说明,对相关的SDH接口进行了讨论,并对IPoverATM,IPoverWDM等传送技术进行了简要的分析和比较.     

未来公用网络中的光互连网

介绍一种应用于未来公用网络中的光互连网 ,它采用 IP over DWDM技术 ,通过 ATM和SONET层的消除降低了成本和管理复杂性。文中首先介绍 IP over DWDM方案 ,然后介绍 IP overDWDM的支持技术—— DWDM的发展状况和因特网业务特征。并介绍 SONET层消除出现的问题及解决方法 ,以及所带来的支路分离的成本节约。最后展望了 IP over DWDM技术的应用前景。     

宽带数据通信网的演进

尽管ＩＰ化已成为宽带数据网络的演进方向,但电信运营商在选择融合网络解决方案时比较现实的选择是优化现有传送网基础设施,同时要兼顾公司目前或将要提供的业务。在光联网方案讨论中,文章对ＩＰ ｏｖｅｒ ＳＤＨ和ＩＰ ｏｖｅｒ ＡＴＭ进行了比较,认为集成型ＩＰｏＡ被看好。但由于ＡＴＭ的局限性,未来的联网方案将是基于ＤＷＤＭ的光互联网,而ＡＴＭ将演变为一种边缘技术,网络智能也将随之转移至网络边缘。     

基于ATM和SDH的宽带IP网及光因特网

本文首先简要介绍了 IP、ATM、SDH、波分复用 (WDM)等技术 ,然后综述了 IP over ATM和 IPover SDH的特点和优缺点 ,简要阐述了提出光因特网技术的缘由。最后指出了在电信与计算机融合成信息产业的过程中 ,IP over ATM和 IP over SDH将长期共存互补 ,在各自最佳应用场合和领域发挥作用 ,最终它们将过渡到光因特网。     

Multicast for RSVP switching: An extended multicast model with QoS for label swapping in an IP over ATM environment

The ubiquity of IP associated with the acknowledgment of ATM as a key switching technology has motivated an increasing interest towards the design of a more efficient way of operating IP over ATM networks. This approach is known under the name Label Swapping. A few studies have addressed the primary issue of providing simultaneously quality of service and multicast. We propose a solution where we mix an RSVP architecture with one Label Swapping technique called IP Switching. We discuss problems that arise when using cut-through associated with an RSVP multicast model and propose an application for an IPv6 environment over an ATM switching hardware.     

IP switching-ATM under IP

Internet protocol (IP) traffic on the Internet and private enterprise networks has been growing exponentially for some time. This growth is beginning to stress the traditional processor-based design of current-day routers. Switching technology offers much higher aggregate bandwidth, but presently only offers a layer-2 bridging solution. Various proposals are under way to support IP routing over an asynchronous transfer mode (ATM) network. However, these proposals hide the real network topology from the IP layer by treating the data-link layer as a large opaque network cloud. We argue that this leads to complexity, inefficiency, and duplication of functionality in the resulting network. We propose an alternative in which we discard the end-to-end ATM connection and integrate fast ATM hardware directly with IP, preserving the connectionless nature of IP. We use the soft-state in the ATM hardware to cache the IP forwarding decision. This enables further traffic on the same IP flow to be switched by the ATM hardware rather than forwarded by IP software. We claim that this approach combines the simplicity, scalability, and robustness of IP, with the speed, capacity, and multiservice traffic capabilities of ATM     

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交换机POS接入技术研究

POS即为Packet over SONET/SDH,是一种在同步光网络上承载IP数据的技术,也是当前因特网上一种重要的传输技术,该技术具有费用低、带宽利用率高、网络简单的优点,因此有广泛的应用前景。讲述了POS技术的原理,并结合ATM交换机,详细讨论了POS技术在硬件方面实现的原理及方法,在软件实现方面给出了功能单元、工作流程及设计要点。