谷歌建设FTTH试验网试图重塑美国宽带市场

在FCC＂国家宽带计划＂正式公布之前,谷歌就宣布了其将建设试验性的超高速宽带网络的计划,并立刻引起业界震动。谷歌FTTH试验网计划的核心目标是推动超高速宽带网建设,开放接入,向业务提供者提供体验新应用、新设备和新业务的机会。谷歌FTTH试验网有可能成为改变美国宽带实施模式的催化剂,就像当年Vonage公司（提供IP电话业务）对固定电话业务造成的影响一样,重塑美国宽带市场。     

3G:中国移动通信业的战略机遇期

1 认识中国3G问题的两个基本点把握我国3G整体产业,坚持国家在3G问题上的根本利益,是我们认识和把握中国3G问题的两个基本点。1.1 3G产业——3G的供给市场与服务需求市场设备提供商(网络设备、终端设备)、网络承建商(包括网络建设和内容提供商)、服务提供商(运营商)和消费者构成了3G产业的价值链,其中设备提供商、网络承建商和服务提供商构成了这个产业的供给环节,而消费者群体构成该产业的需求市场。供给市场又可以细分为设备供给市场和服务供给市场。     

茁壮网络达成众多合作

深圳市茁壮网络股份有限公司(iPanel)(简称"茁壮网络")是一家专注于数字电视软件开发的高科技民营企业,是目前中国数字电视产业中技术、规模都领先的数字电视业务平台及应用软件提供商。该公司在参加CCBN2011期间与多家企业达成新的合作。     

构筑产业联盟 全力推进AVS-IPTV的商用——访中国网络通信集团公司总工程师滕勇

导语:2007年12月14日,由中国网络通信集团公司、信息产业部电信研究院、中国电信集团公司、华为技术有限公司、中兴通讯股份有限公司等18家企业共同发起成立"中国互动媒体产业联盟",涵盖网络运营商、内容提供商、系统和终端制造商、芯片提供商、软件和仪表企业.在信息产业部的协调下,该产业联盟将全面推进基于中国自主知识产权技术AVS的IPTV业务.作为联盟倡议单位之一,中国网络通信集团公司投入大量资源,积极支持AVS技术的创新及应用,在大连的AVS-IPTV商用试验取得了突破.中国互动媒体产业联盟第一任理事长和全体成员大会主席,中国网络通信集团公司总工程师滕勇在百忙之中接受了本刊总编梁海滨的专访.     

我国多媒体通信业务及其市场发展

2008北京奥运会即将到来，IPTV及多媒体通信业务不仅将成为带动电信运营商业务增长的重要战略布局，同时也将是多媒体产业链各方推进“三网融合”、“4C融合”，寻找新增长点的重要契机。诱惑消费者，拓展创新能力，寻找蓝海商机，以成功提供视音频服务、并赢得利润，将成为多媒体产业链中内容提供商、增值服务开发商、网络运营商、宽带服务供应商、系统设备提供商、终端消费电子产品提供商等产业核心环节企业的工作重点，这是产业发展的大势!     

移动互联网业务发展探讨

文章针对移动互联网典型业务、关键技术、运营模式等热点问题进行了讨论,认为未来3G网络能力的提升,使得移动互联网不再是简单的＂移动网＋互联网＂,将对传统互联网的业务模式带来巨大改变;Mashup、移动Widgets等技术的发展可以为用户提供更加优质的服务,提供新的商务模式,为包括运营商、设备提供商、内容/服务提供商（CP/SP）、互联网应用提供商等相关参与方带来收益;移动网络与互联网之间既存在内容与服务层面的竞争,也存在相互的合作,移动互联网业务创新中应突出移动应用特色,避免与传统互联网业务同质化。     

融合、创新、精彩共分享

IPTV作为三网融合的产物,涵盖内容运营商、内容/服务提供商(CP/SP)、网络运营商、业务运营商、设备提供商等多个环节,成为各方在信息通信领域中探寻合作赢利空间的一个切入点.中兴通讯通讯作为业界领先的设备提供商以及综合解决方案提供商,凭借多年的项目实施经验以及对国内产业环境的理解,充分考虑产业链各方利益,通过不断创新合作模式以及业务提供能力,最终为广大用户提供精彩的IPTV业务体验.     

3G网络时代新移动通信企业与CP/SP合作模式分析

一、3G通信网络产生新的电信产业价值链 在以多业务融合为特征的3G网络通信时代，以业务为核心的服务成为各个运营商提升竞争力的焦点。这也正促使一条新的产业价值链的形成（如图），和原有价值链相比，和原有的价值链相比，新的价值链增加了内容提供商（CP）、业务提供商（SP）等新环节，他们发挥着十分重要的作用。     

下一代网络中基于开放接口的业务开发方式

下一代网络是未来网络发展的方向和目标.无论是运营商、设备商还是业务提供商都在开展相关的研究工作,而其中开放接口的研究工作关系到未来增值业务开发模式的定位以及新价值链的形成.因此,本文首先从运营商、设备商及业务提供商3个层面分析了在下一代网络中引入开放接口的必要性.其次,在介绍目前开放接口发展情况的基础上,结合中国电信在开放接口方面的研究与实验结果,通过实际案例具体分析了基于开放接口进行业务开发的方式和方法.     

中国明年将启动100G传输现网试验2015年商用

工信部电信研究院通信标准研究所主任张海懿今天出席2012年光网络新业务论坛时介绍,100Gb／s传输技术已经基本成熟,目前在中国国内正处于规模测试验证阶段,预计明年将启动现网试验项目,2015年大规模商用。     

软件无线电实现方案研究

本文提出了一种基于交换网络的软件无线电的硬件平台 ,同时完成了一个实验平台 ,证明了上述思路是可行的。还介绍了在实验平台中所采用的一种高效率的内插算法     

Survey on SDN-based network testbeds

The network testbed based on software defined networking (referred as SDN testbed) has attracted extensive attention in the academic and industrial circles in recent years,and there have been many valuable cases of system/platform construction.Therefore,an overview of the SDN testbed was intended to conduct in the global scope.Firstly,the advantages of the SDN testbed and the basic design principles of the large-scale SDN testbed was explored comparing with the traditional network testbed.Secondly,in-depth analysis of existing SDN testbed projects was provided from the aspects of the project objectives and progress,the key technologies,network deployment,and featured applications.Finally,the challenges faced in this field were described in terms of network slicing,light and wireless convergence,security,and reliability.Future research directions are also suggested.     

支持未来网络创新的可编程虚拟化路由器技术

未来互联网体系结构、协议、算法需要在试验网络中进行评估与验证。可编程虚拟化路由器是构建未来互联网试验床的核心设备。由可编程虚拟化路由器构建的试验床可以在一个物理网络上构建多个独立虚拟网络,实现不同体系结构并行实验验证。相比传统路由器,可编程虚拟化路由器需要具备虚拟化与灵活可编程的特点。文章给出一种支持未来网络创新的可编程虚拟化路由器平台——PEARL。PEARL具有可编程、虚拟化隔离与高性能的特点,可满足未来互联网试验床建设要求。     

Testbed@TWISC: A network security experiment platform

As the internet continues to grow in width and depth, its very architecture brings many challenges in network research. One significant issue is cybersecurity. Owing to the characteristics of network connectivity, malicious actions may cause losses during information exchanges in communication. Therefore, studying suspicious behaviors and covering potential exploits are necessary to protect networked computers. To determine possible threats, researchers need an experimental environment that enables them to explore and practice. A network emulation testbed provides such a platform to fulfill these purposes. This paper introduces Testbed@TWISC, a large‐scale network emulation testbed on Taiwan's research and education network that supported open research and cybersecurity education for almost 10 years. The paper reviews this testbed's origination, development, and operation experiences. Several findings and open issues of the testbed are also discussed. Readers who plan to build network security testbeds may find useful information in this paper for a case study.     

无线Mesh网络试验床的构建与应用

本文首先叙述了无线Mesh网络国内外研究和发展动态;接着描述了上海交通大学SJTU-Mesh网络试验床的体系结构,包括系统架构、硬件平台和软件结构;然后介绍了试验床的部署与应用情况;最后给出了对未来工作的展望.     

Design and Implementation of an Educational Testbed for Experiencing With Industrial Communication Networks

This paper presents the design and implementation of an educational testbed developed for a course on industrial communication networks at the Engineering Faculty, University of Catania. The aim is to realize a platform capable of emulating various network configurations, thus enabling students to find out by themselves through practical experiments how different design choices, parameter settings, network configurations, and algorithms impact on the overall network performance. The testbed comprises a number of basic components (hosts, routers, and access points) implemented on nodes equipped with operating systems and open source software, which together make up a modular system. Each router can be loaded with data flows and monitored over preestablished time windows so as to evaluate its performance in a wide range of operating conditions. The wireless part makes it possible to configure environments with different levels of noise and bandwidth utilization so as to emulate a broad spectrum of real operating environments. The testbed can be used via remote access through a web interface that not only allows the operating conditions to be configured but also permits real-time monitoring. Students can configure the testbed on the basis of the network they are studying and can measure its performance for evaluation purposes.     

Integrated network experimentation for QoS measurements in opaque MANETs

Integrated network experimentation often combines real nodes with simulated ones, each modeling different portions of the topology, in the same experimental run. They enable new validation techniques and larger experiments than obtainable using real elements alone. Integrated experiments can be particularly useful in testing and validating QoS mechanisms for mobile ad hoc networks (MANETs), when the characteristics of the intermediate wireless network segments are not observable from the end segments, and as a consequence these intermediate segments have to be treated as opaque networks; and also when there is a need to conduct experiments in a real MANET environment at a scale larger than just a few nodes. End‐to‐end QoS assurance for such opaque networks, consisting of admission control and quality adjustment, can be based on techniques for dynamically measuring throughput representing the state of these networks. In this paper, we describe a distributed and hybrid testbed that has been deployed for running large‐scale integrated experiments to demonstrate the efficacy of a measurement‐based QoS solution. The infrastructure for the testbed provides an integrated platform consisting of real nodes running the actual software under test, augmented with a simulated network environment. We define a set of metrics and run experiments to evaluate the effectiveness of the QoS solution as well the performance of the deployed testbed. We propose an alternative architecture that employs a Xen‐based virtualization of the real nodes from the deployed testbed. We compare the performances of the virtualized architecture with the deployed architecture vis‐à‐vis latency and resource utilization. Our goal is to establish benchmarks for running large‐scale experiments on performance and QoS measurements in virtualized environments. Copyright © 2009 John Wiley & Sons, Ltd.     

WDM全光网网络管理系统的设计与实现

基于波长路的ＷＤＭ全光网是下一代高速宽带光纤网络的首选技术，如何对它进行有效而灵活的管理是目前研究的热点。ＳＨＡＯＮＥＴ是国内自主开发的第一个ＷＤＭ全光试验网，它具有自己网络管理系统，可以实现配置管理、性能管理和故障管理。本报导了ＳＨＡＯＮＥＴ网络的设计和它基于ＳＮＭＰ的实现。     

Design and demonstration of policy-based management in a multi-hop ad hoc network

In this paper, we propose a policy-based framework for the management of wireless ad hoc networks and briefly describe a characteristics-based taxonomy that provides a platform to analyze and compare different architectural choices. We develop a solution suite that helps achieve our goal of a self-organizing, robust and efficient management system. One of the main contributions of this work is the prototype implementation and testing of the mechanisms and protocols comprising our framework in a multi-hop ad hoc network environment. Experiments are conducted using both an emulated ad hoc network testbed and a true wireless testbed. Degradation in management system performance is observed as the number of hops between a policy server and client increases. Our proposed k-hop clustering algorithm alleviates this problem by limiting the number of hops between a server and client. We demonstrate the operation of our prototype implementation, illustrating QoS management in a multi-domain ad hoc network environment using the proposed cluster management, redirection, and policy negotiation mechanisms.     

Programmable virtual network as a service: towards a future Internet testbed based on IaaS cloud

During recently years, several OpenFlow-enabled testbeds have been deployed in world-wide research community. Typically, these OpenFlow-enabled testbeds need to stitch to other testbeds to link to virtual servers and immit experimentation traffic. From the view point of researchers, these OpenFlow-enabled testbeds only provide OpenFlow networking resource, and they have to resort to other experiment infrastructure to provide computing and storage resource. Due to the OpenFlow networking and other resource belongs to different infrastructure provider and is managed by their own control software, it is difficult to coordinate these partners to provide a full programmable experiment environment. Meanwhile, the control software of these testbeds are tight coupling with their substrate resources, which means that these substrate resources, together with virtualization technologies, are permanently dedicated to the control software and difficult to be used by other services. In this paper, a new future Internet testbed architecture based on the open Infrastructure-as-a-service cloud and software defined network (SDN) paradigm is proposed. It extends the current virtual network service by adding programmable virtual switch and controller resources that can be controlled by the researcher. Its loose coupling model allows the testbed operator decouple the experiment service from the infrastructure provider, which is a more flexible way to build the testbed. The initial prototype implementation in this paper shows that this new testbed architecture built on IaaS cloud and SDN is feasible and flexible to provide programmable virtual network service.