ATM网络虚通道路由规划的局部搜索方法

文章针对ＡＴＭ网络虚（ＶＰ）路由规划问题进行了分析,提出了使用避部搜索该问题的新方法,仿真表明这种算法是有效的。     

ATM网络虚通道路由规划的禁忌搜索方法

本文针对ＡＴＭ网络虚通道（ＶＰ）路由规划问题（简称ＶＲＰ）问题进行了分析,提出了使用禁忌搜索求解该问题的新方法,并分析了算法复杂度。仿真表明这种算法是有效的。     

On the Design Problem of Cellular Wireless Networks

In this paper, we deal with the problem of how to design cellular networks in a cost-effective way. We first propose an optimization model that deals with selecting the location of the base station controllers (BSCs) and mobile service switching centers (MSCs), selecting their types, designing the network topology and selecting the link types. In order to find a “good” solution, we propose a tabu search algorithm. Numerical results show that the tabu search algorithm produces solutions close to a proposed lower bound.Steven Chamberland received the Electrical Engineering degree from the École Polytechnique de Montréal in 1994 and the Ph.D. degree in Operations Research in 1998 also from the École Polytechnique. From 1998 to 1999, he was with the network architecture group of Bell Canada and from 1999 to 2001, he was a professor at the École de technologie supérieure. Since 2001, he has been an assistant professor of Computer Engineering at the École Polytechnique de Montréal. His research interests include telecommunication network planning and design and network architecture. Dr. Chamberland is a member of IEEE and ACM. E-mail: steven.chamberland@polymtl.caSamuel Pierre received the B.Eng. degree in Civil Engineering in 1981 from the École Polytechnique de Montréal, the B.Sc. and M.Sc. degrees in mathematics and computer science in 1984 and 1985, respectively, from the Université du Québec, the M.Sc. degree in economics in 1987 from the Université de Montréal and, the Ph.D. degree in Electrical Engineering in 1991 from the École Polytechnique de Montréal. He is currently a professor of Computer Engineering at the École Polytechnique de Montréal where he is Director of the Mobile Computing and Networking Research Laboratory and the NSERC/Ericsson Industrial Research Chair in Next- Generation Mobile Networking Systems.Dr. Pierre is the author of four books, co-author of two books and six book chapters, as well as over 200 other technical publications including journal and proceedings papers. He received the Best Paper Award of the Ninth International Workshop in Expert Systems & their Applications (France, 1989), a Distinguished Paper Award from OPNETWORK’2003 (Washington, USA). One of these co-authored books, Télécommunications et transmission de données (Eyrolles, 1992), received special mention from Telecoms Magazine (France, 1994). His research interests include wireline and wireless networks, mobile computing, performance evaluation, artificial intelligence, and electronic learning. He is a Fellow of Engineering Institute of Canada, senior member of IEEE, a member of ACM and IEEE Communications Society. He is an Associate Editor of IEEE Communications Letters and IEEE Canadian Review. He also serves on the editorial board of Telematics and Informatics published by Elsevier Science. E-mail: samuel.pierre@polymtl.ca     

ATM交换的最佳缓存器分配

研究具有输入和输出队的ＡＴＭ交换的缓存器分配策略。文中首先建立了描述交换网络的模型，然后分析了在有限缓存容量下在输入队和输出队中分组的丢失率。分析表明总的丢失率是输入队和输出队容量的复杂函数，因而在总的缓存容量一定的情况下，必存在使丢失率最小的缓存分配方法。最后用数值结果说明了最佳的分配策略。     

ATM业务量管理及其对ATM交换机设计的影响

ＡＴＭ网络允诺为各种通信业务在同一个通信网络中提供满足各自服务质量的要求的服务。为此，ＡＴＭ网络体系应能提供业务量管理（ｕｔａｆｆｉｃ ｍａｎａｇｅｍｅｎｔ）功能以支持网络业务千差万别的服务质量要求。本文首先阐述了ＡＴＭ论坛（ＡＴＭ Ｆｏｒｍ）中所定义的ＡＴＭ业务种类，它们各自的服务质量要求，以及为保证服务质量所应采用的管理策略。ＡＴＭ交换机是网络中的关键部件，其不同的设计思想对网络中不同业务服务     

基于进化规划的ATM网络优化路由算法

根据ATM网络承载业务的特性，提出了以最小化全网平均信元丢失率为目标函数，以途经交换节点数目为约束的优化路由准则，并应用进化规划方法求解此优化问题。     

基于快速分组的ATM交换技术

本文详细地阐述了目前存在的几种基于快速分组的ＡＴＭ交换网络，并介绍了一些解决网络阻塞的可行方法，还给出各种结构网络的性能分析结果。     

采用聚合并行机制的ATM高性能交换结构

本文旨在寻求一种合适的途径解决ＡＴＭ交换系统中的输出冲突问题，提出一种基于Ｂａｔｃｈｅ－Ｂａｎｙａｎ的交换结构，能为每一输出端口从端提供多重并行路径，能同时传送多个相同目的地址的信元到所要求的目的端口，从而解决了输出冲突问题，由于这些多重路径聚合于单一的交换平面上，这种方案不仅能获得可靠的性能，而且还能降低硬件需求，文中详细描述了这种交换机制的结构，并用理论分析与计算机模拟两种方法对其性能作出评价     

一种具有良好可扩展性的ATM交换结构

我们在这篇文章中提出一种具有良好可扩展性的ＡＴＭ交换结构。该交换结构的基本交换单元为纵横式的带有缓冲存储器的２×２交换单元,再由这些基本交换单元以Ｂａｎｙａｎ网形式构成更大规模的ＡＴＭ交换网。这种交换结构具有分布的缓冲存储器以确保低信元丢失率,因其结构简单而具有很好的可扩展性并且易于维护,适合构造大规模的ＡＴＭ分组交换机。     

一种多输入队ATM交换结构

本文提出一种多输入排队ＡＴＭ交换结构和相应的输出冲突解决方法，它可以使交换网络避免输入队固有的排头阻塞，从而使网络在不增加运行速率的情况下，可达到输出排队的性能。文中介绍了冲突解决办法及其实现技术，说明它可方便地在高速网中实现。     

带输入缓冲的ATM交换机的吞吐量分析

在ＦＣＦＳ（先来先服务）准则下,ＡＴＭ（异步传递模式）交换机的吞吐量为０．５９。文章提出了三种提高ＡＴＭ交换机的吞吐量的方案：方案Ａ（输入扩展方案）、方案Ｂ（窗口选择方案）和方案Ｃ（信元舍充方案）。笔者认为,对于方案Ｃ,所有信元都属于一个猝发的相关业务,被分配到同一个输出端口,而且每一个业务源都是ＩＢＰ（中断贝努利业务进程）模型,方案Ｃ的结果表明：目标的相关性不影响吞吐量,当所有的输入业务平衡时,     

A Study of MPLS Hybrid Switch Based on ATM Switch

1　ＩｎｔｒｏｄｕｃｔｉｏｎＭｕｌｔｉｐｒｏｔｏｃｏｌＬａｂｅｌＳｗｉｔｃｈｉｎｇ(ＭＰＬＳ)ｉｓｒｅ ｇａｒｄｅｄａｓｔｈｅｄｉｒｅｃｔｉｏｎｏｆｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆＡＴＭｂｙｔｈｅｉｎｄｕｓｔｒｙ .ＴＣＰ/ＩＰｈａｓｂｅｅｎｔｈｅｍｏｓｔｉｍｐｏｒ ｔａｎｔｎｅｔｗｏｒｋｉｎｇｌａｙｅｒｐｒｏｔｏｃｏｌ,ｗｈｉｃｈｍｅａｎｓｔｈｅｏｂ ｊｅｃｔｏｆｄｅｖｅｌｏｐｉｎｇＡＴＭｔｏｔｈｅｄｅｓｋｔｏｐｗｉｌｌｎｏｔｂｅａｃｈｉｅｖｅｄａｎｙｍｏｒｅｉｎｆｕｔｕｒｅ.Ｔｈｅｒｅｆｏｒｅ ,ｍａｎ…     

上海ATM宽带交换试验网

本文介绍了上海ＡＴＭ宽带交换试验网的网络组成，组网的主要设备以及主要应用系统。     

基于ATM的MPLS交换结构研究

文章研究了基于ATM的MPLS交换设备的总体结构,重点研究和分析了具体实现MPLS交换的两种结构,为MPLS交换设备的具体研制提供了交换结构的参考.     

ATM校园主干网的组建分析

首先分析了建立ＡＴＭ校园主干网的总体需求，进而讨论了组网的若干重要环节并给出了应用示例。     

基于TMN的ATM虚拟专用网(AVPN)管理

建立在 ATM网络之上的 ATM虚拟专用网 (AVPN)可提供话音、数据和图像等多种业务。为了提高 AVPN的运营效率 ,促进 AVPN的进一步发展 ,迫切需要一个开放的、标准的网络管理系统。文中以 TMN框架结构为背景 ,对基于 ATM网络之上的 AVPN的管理作了一些初步的讨论。     

STM交换与ATM交换对宽带业务阻塞概率的对比分析

文章提出了一种多速率来务环境下阻塞概率的分析模型和状态方程，得出了阻塞概率的计算公式，研究结果表明，对于ＣＢＲ业务，ＳＴＭ方式对宽带业务的阻塞率低于ＡＴＭ方式。     

基于ATM的多协议封装

介绍了３种基于ＡＴＭ的多协议封装的协议栈，对基于路由的及基于桥接的高层协议数据单元的封装格式进行了详细的分析。     

Capacity Planning of Survivable Mesh-based Transport Networks under Demand Uncertainty

Almost all existing work on the design of survivable networks is based on a specific demand forecast to which one optimizes routing and transport capacity assignment for a single target planning view. In practice these single-forecast models may be used repetitively by a planner to consider a range of different scenarios individually, hoping to develop intuition about how to proceed. But this is not the same as having a planning method that can inherently and quantitatively consider a range of possible futures all at once. Our approach considers both the cost of initial design construction and the expected cost of possible augmentations or “recourse” actions required in the future, adapting the network to accommodate different actual future demands. In practice, these recourse actions might include lighting up a new DWDM channel on an existing fiber or pulling-in additional cables, or leasing additional capacity from third party network operators, and so on. A stochastic linear programming approach is used to achieve designs for which the total cost of current outlays plus the expected future recourse costs is minimized. Realistic aspects of optical networking such as network survivability based on shared spare capacity and the modularity and economy-of-scale effects are considered. These are not only important practical details to reflect in planning, but they give the “future-proof” design problem for such networks some unique aspects. For instance, what is the working capacity under one future scenario that may not waste capacity if that demand scenario does not materialize, because the same channels may be used as shared spare capacity under other future scenarios. Similarly economy-of-scale effects bear uniquely on the future-proof planning problem, as the least-cost strategy on a life-cycle basis may actually be to place more capacity today than current requirements would suggest. This is of obvious relevance to planners given the recent hard times in the telecommunications industry, causing a tendency to minimize costs now regardless of the consequences.     

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。