ADSL网络从ATM向IP的演进

本文简要介绍了ADSL发展情况，承载网从ATM向IP演进，ATM DSLAM向IP DSLAM溶进以及宽带业务发展的一些问题。     

ATM adaptation layer choice for IP/ATM integration

This paper gives a detailed evaluation of different ATM adaptation layers in terms of overhead, functionality, efficiency, and performance, and introduces a new adaptation layer that overcomes the shortcomings of existing layers. Copyright © 1999 John Wiley & Sons, Ltd.     

A new ATM adaptation layer for TCP/IP over wireless ATM networks

This paper describes the design and performance of a new ATM adaptation layer protocol (AAL‐T) for improving TCP performance over wireless ATM networks. The wireless links are characterized by higher error rates and burstier error patterns in comparison with the fiber links for which ATM was introduced in the beginning. Since the low performance of TCP over wireless ATM networks is mainly due to the fact that TCP always responds to all packet losses by congestion control, the key idea in the design is to push the error control portion of TCP to the AAL layer so that TCP is only responsible for congestion control. The AAL‐T is based on a novel and reliable ARQ mechanism to support quality‐critical TCP traffic over wireless ATM networks. The proposed AAL protocol has been validated using the OPNET tool with the simulated wireless ATM network. The simulation results show that the AAL‐T provides higher throughput for TCP over wireless ATM networks compared to the existing approach of TCP with AAL 5. This revised version was published online in July 2006 with corrections to the Cover Date.     

IP/ATM over xDSL技术

随着Internet和Intranet的发展,人们对访问速度的要求越来越高,出现了多种接入技术来满足用户对高速数据接入的需求,如:数字用户环路(xDSL)、混合光纤同轴电缆网(HFC)、基于ATM的无源光网络(APON)、多点分配系统(xMDS)等.     

ATM网支持IP协议的研究

ＡＴＭ网络是面向连接的，而ＩＰ是采用数据报方式的无连接协议。讨论ＩＰ协议数据格式与ＡＴＭ信元格式之间转换方法、ＡＴＭ地址与ＩＰ地址映射方法及利用信令系统建立虚通路连接传输ＩＰ业务的方法。     

TCP/IPoverATM的性能研究

 本文讨论将传统的TCP拥塞控制机制和CIPOA用于采用ER(FB)算法和EFCI(CCR)算法的ATM网络时可用比特率业务(ABR)和未确定比特率业务(UBR)的性能.仿真结果表明,无论在缓冲区的需求、带宽分配的公平性、吞吐量和链路利用率方面ABR业务的TCP性能均明显优于UBR业务.对于较简单的网络模型ER(FB)算法的TCP性能优于EFCI(CCR)算法,更优于传统的EFCI算法.     

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。     

Guaranteed frame rate: a better service for TCP/IP in ATM networks

Guaranteed frame rate, approved by the ATM Forum, is expected to become an important service category to efficiently support TCP/IP traffic in ATM networks. We first describe the GFR traffic contract in detail. We then present different types of switch implementations that have been proposed to support GFR. We analyze the performance of three of these switch implementations by simulations in two different network environments. These simulations show that the scheduler-based implementations provide a much better performance than the simple switch implementation. However, we also show that coupling an active packet discard mechanism to a scheduler-based switch implementation does not produce a performance gain when many TCP connections are multiplexed inside one ATM VC     

IP与ATM综合

介绍IP与ATM综合的各种技术、概念与原理，包括IP交换、CSR。Tag交换、ANIS和MPLS。最后给出用这些技术及有关技术研制的多层交换产品现状。     

The ATM Forum's private network/network interface

The ATM Forum completed the first version of its private network/network interface (PNNI) in March 1996 and many ATM switch manufacturers are now offering early implementations. PNNI offers a different type of internetwork or internodal interface from the traditional Signalling System No 7 based approach favoured to date by 'public' network operators, such as BT. In spite of its name, however, PNNI may find its place in network service provider networks as well as in 'private' or customer networks. Some of the perceived limitations of the current specification for such an environment are currently being addressed in version 2, tentatively due for completion in the second half of 1998.The PNNI really consists of two parts, a signalling protocol based around the ATM Forum's UNI signalling specification, and a dynamic source routeing protocol. This paper aims to provide an overview of the functionality and mechanics of PNNI, and to compare and contrast with the functionality offered by ITU-T's B-ISUP.     

一种ATM/MPLS网络的负荷分担方案

在某一ATM/MPLS体制的保证信息安全的通信试验网络中,网络流量呈星形分布,各个单元传送到中心节点应用网络的业务量通过单个100Mb/s以太网接口不能满足要求,需要通过多个端口接入MPLS网络。针对如何在接入的多个端口之间进行负荷分担的问题,提出了一种基于路由模式工作的防火墙网络地址转换NAT功能及MPLSTE实现的负荷分担方案,简单实用,该方案已经成功应用于实际的组网环境,并通过试验验证能够满足系统的应用需求。     

Broadband wide-area networking via IP/ATM over SATCOM

A concept for broadband wide-area networking based on the use of the Internet Protocol (IP) over asynchronous transfer mode (ATM) broadcast over extremely high-frequency (EHF) 30/20 GHz Ka-band satellite communication (SATCOM) is presented. It is primarily intended to support applications such as broadcast of data and video, fast Internet access, and teleconsultation with interactive white board. Operation from midsize terminals located at a corporate headquarters to small highly transportable terminals at remote facilities is envisioned     

IP/ATM integrated services over broadband access coppertechnologies

A rich set of broadband access copper technologies is available in the market today, and more are coming out of the laboratories, rapidly moving to standardization. The most likely future scenario will be one where many different technologies coexist. This multi-access-technology paradigm poses an interesting internetworking problem where interoperability and capability to support today's and future user services play a major role in the design of a network architecture. This article begins with an overview of current and new xDSL access technologies to continue describing an access network design that harmonizes the interconnection between PON, xDSL, and native ATM transport technologies. The use of ATM technology for the interface to the broadband access and transport networks is then presented and justified. The article continues studying the protocol architectures proposed for access to network service providers, considered a driver application for broadband access deployment. Finally, different protocol architectures that can provide integrated services support at the user equipment are analyzed     

IP与ATM的综合透视

本文就目前IP与ATM存在的问题,讨论了IP与ATM的融合技术。     

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。     

Toward a new IP over ATM routing paradigm

The explosive growth of the Internet has given IP routing new challenges. Innovative solutions have been proposed to solve the current router bottleneck by evolving to a tighter integration of IP and ATM, an approach called shortcut routing. This article categorizes the current IP over ATM shortcut proposals and identifies a number of issues. However, while IP and ATM routing and forwarding functions must be more closely integrated, a differentiation according to type of traffic seems advantageous; hence the need to evolve to an IP over ATM dual-mode routing model     

ARMORIQUE: A pure ATM versatile interconnection network

We present a proposal for a pure all-ATM private network architecture able to be implemented on any physical wiring (star, ring or hierarchical network). The discussion is based upon an experimental network under study in CNET, named ARMORIQUE. Traffic estimations show that the solution proposed is able to fulfil severe grade of service requirements and offers sufficient throughput to the interconnected sources.     

Warren: a low-cost ATM home area network

This article introduces the concept of the ATM Warren. The Warren is an arbitrary mesh subnetwork of very simple ATM switches and end stations connected to the wide-area B-ISDN at one or more points. The Warren differs from other ATM networks in that both switches and end stations are designed to be implemented entirely in hardware with all control software banished to external computers     

采用NEC新一代ATM交换机与IP集成

主要介绍了NEC ATOMNET／M16 ATM交换机的技术特点及ATOMNET／M16 ATM交换机与IP业务的集成。