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1.
0307553IP 网络性能指标体系的研究[刊]/杨雅辉//通信学报.—2002,23(11).—1~7(L)网络性能指标是网络测评的基础。本文从网络测评的不同角度对 IP 网络的性能指标进行了综合分析,提出了一种能系统反映 IP 网络性能的指标体系,并给出了 IP 网络性能指标体系的形式描述。在此基础上引入了泛化指标和确定性指标的概念,探讨了确定性指标的内容及描述框架。该研究突破了目前 IP 网络性能指标体系研究的简单性、局限性、对 IP 网络测试和性能评价具有指导意义。参6  相似文献   

2.
IP网络性能指标及其测试方法的研究   总被引:1,自引:0,他引:1  
随着IP网络业务的发展,IP网络的性能越来越受到人们的关注。本对IP网络性能指标体系及其测试方法进行了研究,并介绍了运用该指标体系及测试方法开发的VoIP服务质量综合测试系统实验原型。章最后对IP网络测试的发展方向进行了展望。  相似文献   

3.
随着IP网络业务的发展,IP网络的性能越来越受到人们的关注。本文对IP网络性能指标体系及 其测试方法进行了研究,并介绍了运用该指标体系及测试方法开发的VoIP服务质量综合测试系统实验原 型。文章最后对IP网络测试的发展方向进行了展望。  相似文献   

4.
瞿鑫 《中国数据通信》2014,(23):113-113
随着计算机网络技术的发展,IP网络的性能受到了人们的关注关注与重视。基于此,本文对IP网络性能指标进行分析,并对IP网络性能的测试方法进行研究,介绍了IP网络中应注意的细节问题及有效解决方法,以保证网络信息服务质量。  相似文献   

5.
本文提出了IP网络性能的主要评价指标,论述了IP网络性能的技术本质及其对用户使用的影响,并通过实例说明了IP网络性能的具体分析办法。  相似文献   

6.
给出了IP网络服务质量体系模型并对其进行了简单的介绍,在此基础上,对服务质量体系中与多媒体业务相关的主要问题进行了讨论,包括多媒体业务类型的划分、业务服务质量向网络服务质量的映射、网络服务质量指标的分配等,目的在于为了解基于IP网络的多媒体业务的服务质量研究现状、存在的问题与发展方向提供参考。  相似文献   

7.
随着高校校园网规模的逐步扩大和网络功能的不断完善,建成安全、可靠、高效的校园网络已经成为衡量院校办学综合实力的重要指标之一。目前,校园网在不断的应用和发展中面临网络安全性、健壮性、可靠性等多重指标的复合评估。在这种新要求下,校园网必须采用新思路、新方法和新的网络模型进行研究。文章通过研究传统的IP网络性能指标和方法,说明了传统的排队论、马尔科夫链、ON/OFF模型已不适用于分组网的研究,并介绍了IP网络的度分布、IP网络流量概率分布特性、IP网络流量H分布、长程依赖性、自相似性等特点,对武威职业学院校园网性能提升和网络优化提供有力的理论和数据支持。  相似文献   

8.
首先说明IP业务类型划分,接着提出支持实时、交互式或客户关键业务的网络延时、延时抖动、丢包率、可用性等性能指标,并对这些性能特征提出端到端性能、源/目的节点性能聚合和网络性能聚合描述形式。  相似文献   

9.
卫星话音通信网运行质量指标体系研究与评估   总被引:1,自引:0,他引:1  
杨柳  张宁 《通信技术》2014,(3):286-289
综合评估卫星通信网络运行质量对于卫星通信网络性能的提高和网络管理具有重要意义。为了科学合理评估运行的卫星通信网络,结合卫星通信网络特点提出了指标体系的构建原则;在此基础上从网络管理功能角度出发,主要针对以语音为业务的非IP体制卫星通信网络,通过对影响网络运行质量的指标进行选取、分类、聚合、量化,构成了卫星话音通信网运行质量指标体系,并利用模糊综合评价法进行了评估。  相似文献   

10.
随着TD-SCDMA系统的发展,系统网络规划和优化已提上日程,关键性能指标(KPI)参数是实施无线网络性能评价和网络规划优化的重要依据。文章基于网络和产品层面对TD-SCDMA系统的KPI指标进行研究,重点分析了TD系统特有的KPI指标,描述了网络KPI与产品KPI之间的区别和联系。  相似文献   

11.
With the improvement for comprehensive and objective understanding of the network system,the research and application of network system security metrics (NSSM) are noticed more.The quantitative evaluation of network system security is developing towards precision and objectification.NSSM can provide the objective and scientific basis for the confrontation of attack-defense and decision of emergency response.The global metrics of network system security is a crucial point in the field of security metrics.From the perspective of global metrics,the status and role of global metrics in security evaluation were pointed out.Three development stages of metrics (perceiving,cognizing and deepening) and their characteristics were analyzed and summarized.The process of global metrics was described.The metrics models,metrics systems and metrics tools were analyzed,and their functions,interrelations,and features in security metrics were pointed out.Then the technical challenges of global metrics of network systems were explained in detail,and ten opportunities and challenges were summarized in tabular form.Finally,the next direction and development trend of network system security metrics research were forecasted.The survey shows that NSSM has a good application prospect in network security.  相似文献   

12.
A performance assessment approach based on change-point detection for network moving target defence was proposed.Directed to the problem of network resource graph not being able to present the effect of network resource vulnerabilities to network nodes,a conversion relationship between resource vulnerability changes and node security states was established by defining the concept of a hierarchical network resource graph and the efficiency of resource graph construction and updating were improved.Furthermore,directed to the problem of static detection algorithm not being able to precisely measure the dynamic change of network moving target defense,a change-point detection algorithm and standard degree measurement algorithm was designed.The security cost and benefit of network moving target defense in real-time and dynamically on the basis of unified metrics were defected and measured,which improved the evaluation accuracy.The analysis result of typical examples has proved the feasibility and the effectiveness of the proposed approach.  相似文献   

13.
A new passive method for automatic discovery and location of network failure is proposed. This method employs a passive measurement to collect information and events from network traffic, and employs a model-based reasoning system to detect and locate network faults.Measurement points are deployed in a backbone network to capture the traffic and then evaluate the Quality of Service (QoS) metrics of end-to-end IP conversations. A routing model is also established for the observed network to simulate the attributes and activities of routers and links. This routing model also deduces the routing path for each IP conversation, and thus the QoS metrics of IP conversations are mapped into the metrics of paths. With the information of shared links of overlapping paths and network tomography technique, the QoS metrics of links can also be estimated, and the poorly rated links are picked out as failure points. This method is implemented in a tool named Fault-Man, which is deployed in a campus network. Test results have shown its availability in middle-scale networks.  相似文献   

14.
基于测量的网络性能评价方法研究   总被引:19,自引:0,他引:19  
网络性能评价方法的研究对于指导网络设计和改进网络运行性能状况有着重要的意义。为了综合地评价网络的运行状况,在测量的基础上,提出了基于多个测量指标的多指标综合评价方法,并应用到路径性能评价和网络性能评价上,该值反映了路径和网络的综合性能状况,并可以按照不同的策略分析路径和网络之间的性能变化情况。实验结果表明,该方法可以有效的评价目标路径和网络的运行状况。  相似文献   

15.
Packet reordering is an inevitable phenomenon on the Internet. An ideal metric for packet reordering should capture reordering accurately, provide insight into the nature of reordering, and help in the evaluation and analysis of reordering leading to mitigation of its adverse effects. Proposed metrics for packet reordering, namely, reorder density, reorder buffer‐occupancy density, reordering extent, and n‐reordering, overcome to various degrees the deficiencies of percentage reordering in capturing the nature and extent of reordering. These metrics vary widely in areas such as evaluation complexity, measurement technique, usage, and in the definition used for packet reordering itself. Metrics for reordering are evaluated using a framework consisting of a set of both essential and desirable attributes of reorder metrics. The attributes include the ability to capture reordering, sensitivity to lost and duplicate packets in reorder measurements, usefulness, simplicity, and evaluation complexity. Finally, the characterization of packet reordering using these metrics is discussed, using sets of measurements carried over the Internet. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   

16.
带宽测量实验研究及其算法改进   总被引:2,自引:0,他引:2       下载免费PDF全文
谢高岗  汤艳霞  张大方  李忠诚 《电子学报》2002,30(Z1):2142-2145
带宽是网络规划、管理和性能优化的重要指标.主动带宽测量技术可以跨越多个自治系统实现端到端的带宽测量,因此被广泛研究,目前已提出了大量的主动带宽测量算法.比较算法性能是设计精确、高效、健壮带宽测量算法的基础.本文定义算法的性能评价指标;通过大量带宽测量实验,从原理和实验结果分析指出误差累计和背景流量影响是影响现有测量算法性能的最主要原因.在此基础上,提出和实现一个任意链路带宽测量方法,该方法可以消除逐跳测量造成的误差累计和背景流量影响.  相似文献   

17.
陈鸣  周骏  常强林  高屹 《通信学报》2006,27(5):100-106
将具有网络测量智能的探针移动到用户端系统中,再通过Web浏览器控制其测试参数并显示测试结果,这种端到端故障诊断系统能够方便、迅速地诊断出网络故障,结合使用网络测量策略系统更容易改变测试条件和增加测试功能.提出了基于智能代理的端到端故障诊断系统的体系结构,讨论了其实现技术并介绍了相关的应用。  相似文献   

18.
方华建  吕光宏 《电子科技》2012,25(10):97-100
在无线Mesh网络路由判据的研究中,最小跳数、ETX、ETT等路由判据没有考虑到无线网络中的干扰问题,据此选出的一般不是最佳路由。因此,基于它们的路由协议会对整个无线Mesh网络的延时、丢包率、吞吐量等性能产生较大影响。干扰感知型路由判据的提出对无线Mesh网络性能的提升起到了一定的作用。  相似文献   

19.
设计了一种基于低成本IP反射器的分布式NGN承载网性能评估系统,部署在NGN承载网络的不同级网络设备之间,对IP网络的不同性能指标进行实时监测,并对网络服务质量(QoS)进行评估。基于FPGA实现的低成本IP反射器很好地实现了对网络性能参数的实时采样测量。本系统设计可维护、可管理、可升级。  相似文献   

20.
介绍了IP网络测量的概念并归纳分析了各种测量方法。详细论述了网络性能评价指标体系的建立原则、指标选取依据和权重确定方法,主要包括网络性能、网络流量和业务质量三类指标。  相似文献   

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