基站工程设备及网络测试的实践

本文以LTE基站工程配套设备单项工程(桂林)和4G网络一期工程基站主设备工程(桂林)基站设备安装及调测施工、验收为工程背景,简要探讨了移动通信基站设备及网络的测试等相关内容,仅供交流.     

基于双协议栈的IPv6网络性能测试系统的实现

IPv6网络性能测试是IPv6测试中的一个重要部分。针对目前IPv6网络性能测试软件的缺乏,在研究IPv6网络性能测试的性能指标、测试方法及测试结构的基础上,设计实现了一个W indows平台下IPv6网络性能测试系统IPv6PTS,并使用该系统实测了一个IPv6实验网的性能指标。实验表明,该系统具有较好的可扩展性和实用性。     

几种计算机网络互联设备的比较

分析了用于网络互联的各种中继系统：转发器,网桥,路由器和网关在网络体系结构中的工作层次,基本概念及主要功能,总结了它们各自的适用场合,最后提出了购置网络互联设备一个普遍遵循的原则。     

智能变电站系统网络性能测试与分析

网络是智能变电站信息交互的枢纽,信息传输实时性是否能满足变电站的要求是智能变电站的关键。本文结合某智能变电站系统网络性能测试的实际情况,分析了数据传输时延产生的原因。针对该问题,提出了基于优先级标签的变电站过程层(SESPL)信息综合传输方法,并对该方法有效性进行了验证。     

网络互联及常用互联设备应用详述

网络互联是构成计算机网络的最基本技术。文章介绍了网络互联的目的和所要解决的问题,并对实现网络互联的常用设备进行了较为详实的分析与比较。     

以太网控制器的嵌入式设备网络互连

RTL8019AS以太网（Ethernet）控制器在电子设备日趋网络化的背景下,被广泛应用于各种嵌入式设备上。本介绍以及网控制器RTL8019AS的结构;结合MOTOROLA的嵌入式MPUMC68VZ328,分析RTL8019AS的硬件和软件的设计。     

如何通过性能测试选购网络视频服务器

目前，市场上的网络视频服务器琳琅满目，面对如此众多的产品，用户该如何去选择？本文作者以其个人对视频服务器性能测试上的经验与读者进行分享，相信能有所助益。[编者按]     

基于节点和设备的网络测试

根据网络测试的方法,对动力部能调中心的网络进行节点和设备的网络测试,以确保网络畅通,性能稳定。     

A Scalable Interconnection Network Architecture for Petaflops Computing

Extrapolating technology advances in the near future, a computer architecture capable of petaflops performance will likely be based on a collection of processing nodes interconnected by a high-performance network. One possible organization would consist of thousands of inexpensive, low-power symmetric multiprocessor (SMP) nodes. Each node will inject data into the interconnection network at a very large rate and consequently, the interconnect scheme is one of the most crucial design issues affecting system performance. This paper describes the 2D simultaneous optical multiprocessor exchange bus (2D SOME-Bus) which has the potential to become the basis of a high-end computer architecture capable of petaflops performance. It consists of N horizontal, N vertical 1D SOME-Bus networks, and N ² nodes. Each node is connected to one horizontal and one vertical 1D SOME-Bus. Each of N nodes connected to one 1D SOME-Bus has a dedicated broadcast channel and an input channel interface based on an array of N receivers monitoring all N channels and allowing multiple simultaneous broadcasts. In the 2D SOME-Bus, messages being broadcast on one Bus can be broadcast in a cut-through manner on one or more Buses in the other dimension. This paper describes the optoelectronic devices and technology which make the 2D SOME-Bus possible, and the network interface organization. It also presents simulation results which compare the performance of the 2D SOME-Bus, the 1D SOME-Bus, the crossbar and the torus under the message-passing paradigm.     

高速公路计算机网络性能检测

利用网络测试工具对高速公路计算机网络进行检测,快速发现网络设备存在的问题和整个网络系统的性能分析。     

A High-Performance and Cost-Efficient Interconnection Network for High-Density Servers

The high-density server is featured as low power, low volume, and high computational density. With the rising use of high-density servers in data-intensive and large-scale web applications, it requires a high-performance and cost-efficient intra-server interconnection network. Most of state-of-the-art high-density servers adopt the fully-connected intra-server network to attain high network performance. Unfortunately, this solution costs too much due to the high degree of nodes. In this paper, we exploit the theoretically optimized Moore graph to interconnect the chips within a server. Accounting for the suitable size of applications, a 50-size Moore graph, called Hoffman-Singleton graph, is adopted. In practice, multiple chips should be integrated onto one processor board, which means that the original graph should be partitioned into homogeneous connected subgraphs. However, the existing partition scheme does not consider above problem and thus generates heterogeneous subgraphs. To address this problem, we propose two equivalent-partition schemes for the Hoffman-Singleton graph. In addition, a logic-based and minimal routing mechanism, which is both time and area efficient, is proposed. Finally, we compare the proposed network architecture with its counterparts, namely the fully-connected, Kautz and Torus networks. The results show that our proposed network can achieve competitive performance as fully-connected network and cost close to Torus.     

神经网络软测量技术在通风机性能测试中的应用

将神经网络与软测量技术相结合,建立了通风机性能神经网络模型,并用测试数据进行了训练。结果表明,该方法是分析通风机性能的一种有效途径。     

基于自相似模型的网络性能测试

网络性能测试是保证信息网络高性能、高可靠和高可用性的重要和基本手段。该文给出了网络性能测试的基本概念和方法;介绍了基于IP的网络性能参数;分析了IPoverATM网络流量的自相似性,建立了网络流量的自相似模型;基于自相似模型开发了网络性能测试工具并对实际网络进行了测量和分析。     

一种新的处理器间光互连网络

随着计算机系统对互连网络性能需求的提高,传统的电互连技术出现了许多无法克服的问题,光互连技术应运而生。本文设计了一种新的基于高速光开关的处理器间光互连结构——PIBOS,并在此基础上提出了单级PIBOS和多级PIBOS中的链路仲裁和路由算法。模拟结果表明,采用PIBOS互连结构,减少了数据传输过程中的光电转换操作,提高了网络的吞吐率,降低了系统延时,并很好地实现了互连系统的扩展。     

计算机通信网络互连设备及其发展

本文阐述了用于计算机网络互连的主要设备如中继器、网桥、路由器、网关等,分析了其功能特点和主要应用;对通过广域网络进行计算机通信网络互连设备如MODEM、PAD等进行了介绍。最后,结合网络互连设备当前技术和工程应用,介绍了目前网络互连设备的发展状况,如智能HUB等及其功能应用。     

通信网性能测试方法研究

网络性能测试在网络的建设和完善过程中起着非常重要的作用.本文对常见网络测试命令及功能强大的网络测试软件Qcheck和Chariot在网络性能测试中的方法进行了细致的分析和比较,并根据实际工作中总结的经验对Chariot应用技巧作了细致的探讨.