卸下PSTN网络的Internet负荷

本文在介绍了拨号Ｉｎｔｅｒｎｅｔ访问的特点后，分析了长时间的Ｉｎｔｅｒｎｅｔ访问对ＰＳＴＮ网络的影响，并讨论了几种不同的解决方法，分析了它们的优缺点，最后提出了一些个人意见。     

互联网流量与两个相关模型

由于互联网具有多构性、突发连续性和自相似性等特征,使得用传统模型进行的排队分析、性能估计与实际网络有较大差距。本文介绍了两种互联网流量模型:AR IMA模型,FAR IMA模型,讨论了它们的适用范围、模型数学定义,描述了参数定阶推导等相关问题。     

MPLS在Internet流量工程中的应用

首先回顾了IP网络流量工程的概念和所面临的挑战,然后讨论了MPLS(多协议标记交换)的基本概念和发展,指出了MPLS巨大的流量工程能力和主要功能,最后着重分析了MPLS在IP网络流量工程中的应用.     

Traffic flow theory

The traffic theorist of today has an ever-increasing capacity to bring a wide range of technical skills to bear on the pressing problems of traffic congestion, delays, and accidents with their ensuing economic and personal costs. These problems are very complex, but well-defined aspects of them can be dealt with theoretically in explicit mathematical form. Illustrations are given as to how this may be done in meaningful ways to find the relationships between important variables and to determine the influence of parameter values on the performance of traffic systems. The problems discussed consider traffic flow in single and multiple lanes, interference between vehicles and queue formations, single and multiple intersection flows and control and road networks.     

Traffic and Interference Adaptive Scheduling for Internet Traffic in UMTS

In this paper we propose a scheduling strategy for the radio resources management when transmitting Internet traffic over third-generation systems. More precisely, we consider the UMTS Terrestrial Radio Access Network (UTRAN) Time Division Duplex (TDD) mode standardized by ETSI. UTRAN TDD uses a hybrid solution of code and time division multiple access, called TD-CDMA. In UMTS systems a key issue in developing access methodologies for the available spectrum is an optimal management of the rare radio resources. In this paper we present a fair and efficient scheduling algorithm that adapts its behavior to traffic and interference conditions. Specifically, our scheduling algorithm is able to manage the radio resources taking into account both the traffic fluctuations in the uplink and downlink direction and the variations of the system interference. The goal of our scheduler is the data-throughput maximization for an efficient utilization of available radio resources. The effectiveness of our scheduling algorithm is shown by exploiting analytical tools.     

因特网上的MPLS流量工程

主要讨论因特网上多协议标记交换（MPLS）流量工程，首先简述了MPLS、约束路由技术以及增强链路状态内部网关协议，然后讨论了设计MPLS流量工程系统的主要问题，接着说明了配置MPLS流量工程系统的步骤，最后阐述了MPLS网络的QoS机制。     

Traffic engineering with MPLS in the Internet

This article discusses traffic engineering with multiprotocol label switching (MPLS) in an Internet service provider's network. We first review MPLS, constraint-based routing, and enhanced link state interior gateway protocols to provide a background for traffic engineering. We then discuss the general issues of designing an MPLS system for traffic engineering. The design of GlobalCenter's MPLS system is presented. Based on our experiences, a generic procedure for deploying an MPLS system is proposed. We also discuss how to provide QoS in a network with MPLS. Putting these together, we present to readers the practical issues of traffic engineering and a working solution for traffic engineering with MPLS in the Internet     

A Survey on Internet Traffic Identification

The area of Internet traffic measurement has advanced enormously over the last couple of years. This was mostly due to the increase in network access speeds, due to the appearance of bandwidth-hungry applications, due to the ISPs? increased interest in precise user traffic profile information and also a response to the enormous growth in the number of connected users. These changes greatly affected the work of Internet Service Providers and network administrators, which have to deal with increasing resource demands and abrupt traffic changes brought by new applications. This survey explains the main techniques and problems known in the field of IP traffic analysis and focuses on application detection. First, it separates traffic analysis into packet-based and flow-based categories and details the advantages and problems for each approach. Second, this work cites the techniques for traffic analysis accessible in the literature, along with the analysis performed by the authors. Relevant techniques include signature-matching, sampling and inference. Third, this work shows the trends in application classification analysis and presents important and recent references in the subject. Lastly, this survey draws the readers? interest to open research topics in the area of traffic analysis and application detection and makes some final remarks.     

互联网流量成分及运营策略分析

本文从互联网运营商的视角, 通过对互联网流量成分的统计分析,找出了互联网流量成分近年来的发展变化趋势,并且从网络运营管理的角度提出如何对流量实施必要的管理,制定适应当前网络流量特点的业务模式。     

移动互联网流量管理相关问题探讨

随着移动互联网应用的丰富和用户体验的提高,移动互联网流量管理需求越来越迫切.本文在分析移动互联网流量管理需求和技术的基础上.对移动互联网流量管理的相关问题进行了探讨,并提出相应发展思路.     

用 Internet网关保护和优化 TCP 业务的带宽

文章通过多个实验(包括实测和仿真),分别分析了仅有适应性业务和适应性业务与非适应性业务并存时TCP带宽的使用与分配问题,并就保护和优化TCP带宽和缓解拥塞崩溃介绍了Internet网关可以采取的几种措施(主动队列管理、公平队列管理以及针对特定流的分组丢弃),同时给出了研究建议.     

Internet异常流量检测与控制技术

为了解决当前Internet上以DoS(denialofservice)、蠕虫病毒等为代表的流量异常,大量消耗网络带宽资源等日益严重的问题,从电信运营商角度,分析了异常流量的危害及其变化趋势,并结合现状,从现有技术条件出发,系统地提出了预防、检测及控制异常流量的方法。     

移动互联网流量经营策略研究

首先指出了开展移动互联网流量经营的必要性。并从拓展用户规模、拉动用户流量消费、提升流量价值和完善机制体制等4个方面,提出了移动互联网流量经营策略建议。     

互联网流量精细化管理策略研究与实践

通过对互联网精细化管理策略的分析,阐述了互联网流量精细化管理在DNS解析、精细化路由、流量管理策略、内容建设和流量牵引等方面的对策研究和实现方式.     

互联网业务流量监测技术的应用和设计

对互联网业务流量监测技术的应用及现状进行了分析，并针对NetFlow技术，对互联网业务流量监测系统建设方案设计中需要考虑的几个重要问题进行了讨论。     

“互联网+交通”解决交通“痛点”

<正>随着城市的快速发展,交通管理、交通拥挤、交通事故救援、环境污染、能源短缺等问题已成为急需破解的难题。交通系统作为城市正常运行的保障,越来越需要通过互联网方式来改进其运行方式。"互联网+交通"是利用互联网技术解决城市交通问题的最佳途径。"互联网+交通"借助移动互联网、云计算、大数据、物联网等信息通信新技术,将互联网产业与传统交通运输业完美融合,形成线上资源合理分配,线下高效优质运行的新格局,满足更便捷出行、更人性化     

运营商互联网流量监测需求探讨

分析了运营商对互联网流量监测、分析的需求，并简要介绍流量监测分析系统的构成和产品发展状况，提出了系统的发展建议。     

Traffic characterization of a residential wireless Internet access

Traffic characterization is an important means for Internet Service Providers (ISPs) to adapt and to optimize their networks to the requirements of the customers. Most network measurements are performed in the backbone of these ISPs, showing both, residential and business Internet traffic. However, the traffic characteristics of business and home users differ significantly. Therefore, we have performed measurements of home users at a broadband wireless access service provider in order to reflect only home user traffic characteristics. In this paper, we present the results of these measurements, showing daily traffic fluctuations, flow statistics as well as application distributions. The results show a difference to backbone traffic characteristics. Furthermore, we observed a shift from web and Peer-to-Peer (P2P) file sharing traffic to streaming applications.     

基于节点行为特征分析的网络流量分类方法

针对基于加密分组数据的网络流量分类问题,该文提出两种基于行为特征的分析方法。结合流量矩阵和网络结构熵技术,定义了出入度熵指数等参数用于描述节点间的连接行为和数据传输特征,并利用多个周期和时间尺度下的熵指数分析不同流量特征。通过可视图建网方法将流量序列转化为连接网络,利用网络结构相关参数分析流量中蕴含的节点间交互行为的差异。实验表明不同业务流量矩阵的熵指数变化趋势差别较大,而流量序列对应连接网络的聚集系数等存在明显差异。两种方法对于不同业务流量具有较好的分类效果。     

面向类不平衡网络流量的特征选择算法

针对网络流量分类过程中出现的类不平衡问题,该文提出一种基于加权对称不确定性(WSU)和近似马尔科夫毯(AMB)的特征选择算法。首先,根据类别分布信息,定义了偏向于小类别的特征度量,使得与小类别具有强相关性的特征更容易被选择出来;其次,充分考虑特征与类别间、特征与特征之间的相关性,利用加权对称不确定性和近似马尔科夫毯删除不相关特征及冗余特征;最后,利用基于相关性度量的特征评估函数以及序列搜索算法进一步降低特征维数,确定最优特征子集。实验表明,在保证算法整体分类精确率的前提下,算法能够有效提高小类别的分类性能。