Digital Interactive TV Network Architecture

Introduction The infrastructure of digital TV is evolving very rapidly.TheTV infrastructure is quickly migrating from analog to digital TV.Even though digital transmission really launched only 10 yearsago.there are already more than 50 M digital receivers worldwide.     

Digital Interactive TV Network Architecture

The infrastructure of digital TV is evolving very rapidly. The TV infrastructure is quickly migrating from analog to digital TV. Even though digital transmission really launched only 10 years ago, there are already more than 50 M digital receivers worldwide. Satellite has been converting to digital the fastest, Cable deployments of digital are now raking place. It is also expected that certain coumtries will completely replace their analog terrestrial infrastructure with digital, extending the deployment of digital technology beyond pay TV to free TV.     

UPnPAV架构的数字多媒体家庭网络

讨论了现在业界关注的数字家庭网络的发展方向，对比了国外各种新的数字家庭网络标准，指出UPnP（Universal Plug and Play）技术正在越来越受到家电厂商的支持。通过深入分析UPnP协议栈和UPnPAV框架．提出并实现了一个UPnP协议栈中间件的模型结构，描述了各模块的功能和在框架中的位置。并在实际应用中实现了该中间件，且基于该中间件开发一个嵌入式系统下基于中间件的UPnPAV控制点实际应用。     

TETRA数字集群网安全保障体系分析

从用户的可控性、通信的保密性和服务的可用性三个方面,对TETRA数字集群网安全保障体系进行了分析。首先,从鉴权、隐藏用户识别码、允许与禁用机制三方面探讨了如何对用户进行识别、保护和管控;其次,比较了空中接口加密、端到端加密、虚拟专网三种手段如何实现通信保密;最后,分析了物理环境、系统构架、频率保护、拥堵控制等安全因素对网络服务可用性的影响。并针对国内应用现状与存在问题,就如何加强中国TETRA数字集群网安全保障体系建设提出几点建议。     

关于天基传输网络体系结构的讨论

认为天基传输网络是天地一体化信息网络的基础设施,其体系结构对整个一体化体系有着重要影响。提出"骨干+区域增强"的双层天基传输网络架构,并对其在星上能力、空中接口、协议体系、路由交换、综合验证等方面需要关注的问题进行了讨论。     

基于智能网关的数字家庭网络系统架构设计

基于智能网关的数字家庭网络系统,主要应用于智能网关的管理,能实现内部网络协议转换和QoS（网络服务质量）动态配置。该系统以PLC及UWB技术原理为基础,基于RC32434的MIPS＋Linux系统平台,多SSID和VLAN技术,增强型X-10的总线技术及VPN技术的应用,实现了家庭网关的多业务和多种端口技术、三网合一的内部网络协议转换技术、智能路由技术及网络数据包过滤技术。     

数字侦察接收机处理架构研究

分析了数字侦察接收机信号处理的特点和本质,指出在很多应用场合,尤其是对复杂雷达信号侦察中,单纯追求对脉冲的峰值处理速度无法充分发挥数字信号处理的优势。在此基础上进一步提出,应以提高平均处理速度为数字接收机设计的指导思想,并给出一种基于该设计理念的数字接收机处理架构。     

TVA: A DoS-Limiting Network Architecture

We motivate the capability approach to network denial-of-service (DoS) attacks, and evaluate the Traffic Validation Architecture (TVA) architecture which builds on capabilities. With our approach, rather than send packets to any destination at any time, senders must first obtain “permission to send” from the receiver, which provides the permission in the form of capabilities to those senders whose traffic it agrees to accept. The senders then include these capabilities in packets. This enables verification points distributed around the network to check that traffic has been authorized by the receiver and the path in between, and hence to cleanly discard unauthorized traffic. To evaluate this approach, and to understand the detailed operation of capabilities, we developed a network architecture called TVA. TVA addresses a wide range of possible attacks against communication between pairs of hosts, including spoofed packet floods, network and host bottlenecks, and router state exhaustion. We use simulations to show the effectiveness of TVA at limiting DoS floods, and an implementation on Click router to evaluate the computational costs of TVA. We also discuss how to incrementally deploy TVA into practice.      

The Architecture of an Integrated Local Network

The DOMAIN system is an architecture for networks of personal workstations and servers which creates an integrated distributed computing environment. Its distinctive features include: a network-wide file system of objects addressed by unique identifiers (UID's); the abstraction of a single level store for transparently accessing all objects, regardless of their location in the network; and a network-wide hierarchical name space. The implementations of these facilities exhibit several interesting approaches to layering the system software. In addition to network transparent data access, interprocess communication is provided as a basis for constructing distributed applications; as a result, we have some experience to guide the choice between these two alternative implementation techniques. Networks utilizing this architecture have been Operational for almost three years; some experience with it and lessons derived from that experience are presented, as are some performance data.     

网络主动防御体系结构

本首先分析了网络攻击的发展现状，并对网络攻击的种类进行了分类，然后提出一种网络主动防御体系结构，该主动防御体系结构对构建一个安全的网络有一定的理论和现实意义。     

浅析IMS网络结构及其应用

语音、视频、数据相互融合的新一代多媒体业务是电信发展的必然趋势,固网和移动网的融合也是网络发展的必然结果。IMS提供了一种实现方式,能较好的把两者统一起来,在通用的网络框架上提供基于IP的多媒体业务。主要探讨IMS的基本特征,IMS的网络功能构成及带来的多媒体业务应用。     

可编程网络体系

可编程网络通过将程序嵌入数据包,对网络节点编程,使网络体系适应用户的需求。可编程网络拓广了端到端原则的含义,形成新的网络概念,本文提出了可编程网络的体系结构,设计原则及应用方法,使网络在保持安全,高效的前提下具备更高的质量。     

基于网络处理器的路由器体系结构

从路由器的体系结构出发,对通信处理器和网络处理器实现报文处理作了比较。最后对网络处理器转发引擎作了详细的分析。     

自组网体系结构研究

Ｃ Ｓ Ｃ Ｗ 系统目标是允许用户在任何地点,在任何时间可以方便地进行群体间的协同工作。目前大多数的 Ｃ Ｓ Ｃ Ｗ 用户都需要依靠现有的网络基础设施。自组网是一组带有无线收发装置的移动节点组成的一个多跳的临时性的自治系统。在这种环境中,由于节点无线通信覆盖范围的有限性,需要借助其他中间节点进行分组转发到达信宿。它可以在没有可用的网络基础设施的情况下提供一种通信支撑环境,从而拓宽了 Ｃ Ｓ Ｃ Ｗ 的应用环境。本文描述了自组网的概念和特点,并提出了自组网的体系结构。     

UMB Network Architecture

Ultra Mobile Broadband (UMB) radio-access technology enables efficient wireless transfer of IP packets at very high data rates while providing seamless mobility and best Quality of Service (QoS), even at the cell edges, without lowering frequency re-use. UMB systems benefit from a highly innovative flat network architecture that simplifies the core network and network interfaces, making it easy to scale the network. One of the key principles for UMB architecture is seamless mobility. A major emphasis is placed on the design of network architecture to facilitate seamless handoffs both within the UMB network and across different technologies. Innovative concepts enable fast switching between base stations while minimizing overhead and offering simpler network interfaces. New tunneling mechanisms provide signaling exchange at the data-link layer (layer 2) and IP layer (layer 3) to enable faster mobility across the base stations. This paper discusses key features of UMB network architecture, and provides insight into various architecture design choices.     

UMB网络架构

超移动觅带（UMB）无线接入技术能以非常高的速率实现IP分组的有效无线传送,同时,即使在小区边缘,也可提供无缝移动和最佳的服务质量（QoS）,而不会降低频率再用。UMB系统利用高度创新的扁平化网络架构,简化了核心网和网络接口,从而易于实现网络扩展。UMB架构的一个主要原则是无缝移动。网络架构的设计是关键所在,有利于实现在UMB网络内和不同技术间的无缝切换。革新性的概念可实现基站间的快速交换,同时最大限度地减少开销和提供简化的网络接口。新的隧道机制提供在数据一链路层（层2）和IP层（层3）的信令交换,实现了跨基站的快速移动。本文探讨了UMB网络架构的主要特性,并对不同架构设计选择进行了深入分析。     

数字通信网的同步技术

本文简要介绍了数字通信网中的同步技术。     

MOVE Architecture in Digital Controllers

The conditional MOVE processor (CMOVE) has been proposed for replacement of logic table driven sequencers like traffic light controllers and microcomputer I/O processors, in order to take better advantage of hardware-software tradeoffs. Herein the architecture of the CMOVE processor is sketched, and its application to traditional numerical control problems is studied. Two basis types of controllers, of potential use in industrial process control, are taken into account: the digital filter type, expressed as a ratio of two 2-transform polynomials (the proportional-integral-differential (PID) controllers is a particular case of the above), and the matrix multiplication type, which produces a control vector in response to a state vector input. A detailed program for a CMOVE realizatiorn of the digital filter is presented. A number of alternative realizations of the matrix controller are discussed in detail and evatuated.     

Network Services in Systems Network Architecture

This paper discusses the services provided by a systems network architecture (SNA) network and design aspects related to these services. Both the basic transmission services and higher level network services are discussed. The first section describes the structure of SNA. The second section describes SNA's transmission services and sketches in the other aspects of SNA's structure. The next section describes services provided to users and managers of the network and the distribution of these services throughout the various nodes of the network. A concluding section discusses several potential extensions.     

NGN网络结构和网络优化

结合中国网通的NGN DC1部署提出合适的网络优化方法。