基于交互、面向服务的新一代网络体系结构模型研究

本文充分重视了扭斗对于网络体系结构研究的影响,总结和归纳了在扭斗环境下设计新一代网络体系结构模型的若干原则,在这些设计原则的指导下提出了一种结构分层、功能分面、基于交互、面向服务的新一代网络体系结构INSA参考模型,并对该参考模型的设计理念、主要特色和形式化建模方法等内容进行了详细阐述.INSA参考模型保持了传统互联网开放、简单和灵活的优点,并且使新一代网络体系结构具有可管理、可控制、可定制、可演进和可重用等特性,为下一代网络的研究和建设提供了崭新的思路.     

MAC Protocol of a Next-Generation MAN Architecture Based on WDM and All-Optical Packet Switching

As media converge to the Internet, MANs will face new demands not only in terms of bandwidth, but also in terms of services. We describe a next generation MAN architecture that has been designed within Dutch project Flamingo. Based on all-optical packet switching, this architecture supports one-to-one, one-to-many and many-to-one communications in the optical domain. Specifically, we focus on the MAC layer of the network. We describe the access and fairness protocols and explain how the all-optical nature of the architecture affects the design of these protocols. We also discuss some performance results that have been obtained via simulation.     

Design issues of optical IP routers for Internet backboneapplications

The rapid increase of Internet traffic is pushing the deployment of WDM technology in the next-generation high-speed Internet backbone. Routers in the backbone could still be the potential bottleneck. In this article we consider some design issues of high-throughput optical routers which combine the advantages of WDM with the new optical switching technology. We first introduce a proposed Internet architecture based on the optical burst switching mechanism. Some important design issues in optical buffering and control function are addressed which are expected to have significant effects on router performance. Numerical results of a simulation study are also presented along with discussions     

4D架构分析与评述

4D架构研究是近年来未来互联网研究领域的一个重要项目,它对互联网控制管理功能架构进行了重构,4D架构研究思路与技术方案具有一定影响。概述了4D架构研究的内容与成果,对其研究目标、思路、设计原则、技术方案等进行了分析与评述。分析表明：4D架构的集中式决策机制有利于提高网络控制管理的自动化程度,但是还有一些技术难点需要研究突破,并且对完全集中式架构进行修改可能会得到更实用化的方案。因此,在4D架构基础上开展进一步的研究工作具有一定的前景。     

基于信息中心的运营监控模型设计

在互联网的全球普及、信息资源大共享的条件下,建立一个信息运营监控系统是十分必要的。本文主要围绕如何设计一个高效、快捷、优质的运营监控系统出发,从业务架构、应用架构、数据架构、技术架构4个方面研究,详细设计了每个架构的功能,分析了各自的作用与意义,最后进行设计思想整合,形成一个整体的系统设计路线,为今后实现监控系统的设计打下坚实的基础。     

CDN体系架构及部署方案探索

如今是科技技术飞速发展的时代,特别是互联网技术在各个方面都得到了质的提升。对于CDN技术来说,该项技术的基本功能、体系构架以及运营部署等方面都取得了长足的发展,不仅技术日新月异,而且整个体系日趋成熟,并且不断朝着纵深方向发展,也变得越来越细化,各方面都得到了完善与优化。基于此,将结合目前CDN技术的网络环境、基本原理、技术特点、体系架构以及服务模式,分析和探索CDN网络的部署方案。     

Fundamental design issues for the future Internet

The Internet has been a startling and dramatic success. Originally designed to link together a small group of researchers, the Internet is now used by many millions of people. However, multimedia applications, with their novel traffic characteristics and service requirements, pose an interesting challenge to the technical foundations of the Internet. We address some of the fundamental architectural design issues facing the future Internet. In particular, we discuss whether the Internet should adopt a new service model, how this service model should be invoked, and whether this service model should include admission control. These architectural issues are discussed in a nonrigorous manner, through the use of a utility function formulation and some simple models. While we do advocate some design choices over others, the main purpose here is to provide a framework for discussing the various architectural alternatives     

The Internet: a global telecommunications solution?

The provision and support of new distributed multimedia services are of prime concern for telecommunications operators and suppliers. Clearly, the potential of the latest Internet protocols to contribute communications components is of considerable interest to them. In this article we first review some of the new types of application and their requirements, and identify the need to support applications that have strict QoS requirements, the so-called critical applications. We review two proposals for enhancing the Internet service architecture. In addition to the integrated services work of the IETF, we look at the proposals for differentiated services in the Internet. We then individually review protocol developments proposed to improve the Internet, and to support real-time and multimedia communications. These are IPv6 (the new version of the Internet Protocol), Resource reSerVation Protocol, and Multiprotocol Label Switching, respectively. In each case, we attempt to provide critical reviews in order to assess their suitability for this purpose. Finally, we indicate what the basis of the future infrastructure might be in order to support the full variety of application requirements     

Fifth Generation Networking Principles for a Service Driven Future Internet Architecture

The vision of all-IP networks where IP forms the simple common layer understandable across the whole network has undeniable advantages. However, such simplicity comes as a major hurdle to flexibility and functionality to the architecture. This is evident from the increasingly numerous and complex engineering solutions and optimizations required to accommodate essential qualities like mobility, security, realtime communication support etc or to mitigate the shortcomings inherent in the ‘traditional Internet’ architecture. While a clean slate approach to address these shortcomings is not an option in a realistic scenario, it is important to examine the architecture as a whole to address emerging network requirements and overcome existing shortcomings at the architecture level rather than engineering solutions to an existing inefficient one. This architectural re-examination should also facilitate discussion into what design principles for future generations of Network Architectures which will eventually replace the design tenets for the current Internet. While 3G and 4G systems were more focussed on convergence towards an All-IP network and some improvements in the core network, the architectural design remains stagnant with layered paradigms and inherent inefficiencies. A departure from this shackled approach could be the distinguishing feature of 5G systems and beyond. We claim that there is a pressing need to move towards a Next Generation Network architecture built to natively support requirements such as network resource abstraction, mobility, security, enhanced routing, privacy, context communications, QoS, parallel processing, heterogeneous networking etc. Instead of treating the network as just providing connectivity specified by endpoints, it is of great advantage to applications to recognise it as a service characterized by attributes, abstracted to a higher level to represent a collection of capabilities that the network offers. This uniform high level abstraction can effectively mask the heterogeneity and implementation discrepancies in the underlying infrastructure. Besides, in a network environment where an connectivity instance might transverse diverse business/ownership/capability domains, the approach proposed in this article can provide a transparent abstraction for resource negotiations across the domain to be available for end-to-end setup. This architectural change should also be manifested according to the principles of SOA to ensure interoperability, backwards compatibility and migration. In this article, we introduce a Service Oriented framework and network architecture aimed at tackling the heterogeneity of emerging requirements and proposed solutions into a coherent interoperable architecture using Web Services specifications as the basic standards. We propose to model the new architecture on relationships between entities and discuss the motivation this new architecture in the form of a new framework called ROSA.     

一种基于软交换的集群媒体服务器的系统结构

为了提供多媒体业务,以软交换为核心的NGN(next generation network)架构对媒体服务器产生了新的技术要求,目前因特网上现存的媒体服务器系统结构不能很好地满足这些要求.本文在深入研究NGN多媒体业务平台的基础上,提出了一种新型的集群媒体服务器系统结构,为问题的解决铺平了道路.文中详述了该系统结构中各节点的软件结构和关键设计问题,并介绍了目前已经在实验室实现的一个原型系统.     

一个Internet路由器级拓扑自动发现系统

本文讨化了一个Internet路由器级拓扑自动发现系统的结构、所遇到的问题和若干关键技术，并实现了一个针对CERNET的拓扑发现原型系统。实验结果表明，发现方法可行，发现原理适合于大规模IP网络，可以拓展为一个发现全国Internet路由器级拓扑的系统。     

互联网路由可扩展问题探讨

随着Internet网络的迅猛发展,传统互联网架构面临着严峻挑战,尤其是路由可扩展问题。本文阐述了互联网路由可扩展问题的背景,分析了导致路由系统可扩展性问题的内在原因和外部原因,在此基础上讨论了设计新型网络架构时所需要满足的要求,并对目前主要的技术策略及思路,以及几个重要解决方案进行了分析与对比。     

实现高速光因特网的技术分析

通用多协议标记交换(GMPLS)技术的出现,为实现光因特网提供了一种新的方法。文章介绍光因特网中的关键协议GMPLS和光因特网的基本形态,并对光因特网节点体系结构进行技术分析。     

基于大数据的移动互联网精准营销平台

为提高信息时代下的企业营销效果，文中基于大数据，探讨了移动互联网精准营销平台的构建与设计。首先，介绍了大数据下的精准营销，明确了移动互联网精准营销平台的优势。其次，介绍了精准营销现状，并从技术架构、业务流程处理、功能架构等方面，阐述了平台架构设计要点。最后，总结了设计要点及效果。通过移动互联网精准营销平台，可实现大数据技术和企业营销的结合，优化精准营销的效果。     

OpenRAN: a new architecture for mobile wireless Internet radioaccess networks

Cellular telephony networks depend on an extensive wired network to provide access to the radio link. The wired network, called a radio access network, provides such functions as power control and, in CDMA networks, combination of soft handoff legs (also known as macrodiversity resolution) that require coordination between multiple radio base stations and multiple mobile terminals. Existing RAN architectures for cellular systems are based on a centralized radio network controller connected by point-to-point links with the radio base transceiver stations. The existing architecture is subject to a single point of failure if the RNC fails, and is difficult to expand because adding an RNC is expensive. Also, although a network operator may have multiple radio link protocols available, most RAN architectures treat each protocol separately and require a separate RAN control protocol for each. We describe a new architecture, the OpenRAN architecture, based on a distributed processing model with a routed IP network as the underlying transport fabric. OpenRAN was developed by the Mobile Wireless Internet Forum IP in the RAN working group. The OpenRAN architecture applies principles to the radio access network that have been successful in reducing cost and increasing reliability in data communications networks. The result is an architecture that can serve as the basis for an integrated next-generation cellular radio access network     

European research on future internet design - seamless content delivery in the future mobile internet

Future Internet has become the federating theme for European research on communication networks and services. At the core lies research on communication networks toward an efficient, scalable, and reliable future Internet coupled with research on the underlying technologies, in particular mobile and wireless access and optical networks. This article first presents the motivation for a bold initiative for future Internet research in Europe. In this context a changing business environment for telecommunications and the Internet, and the opportunities to provide future Internet services are discussed. From a technical perspective the limitations of the current Internet technology are outlined. The research activities that address the challenge of future Internet research are introduced under three main lines: future Internet architecture and network technologies, spectrum-efficient access to future networks, and converged infrastructures in support of future networks. Examples of the first promising approaches to significantly change the principles of the Internet architecture and protocols are presented.     

IP电信网体系架构刍议

因为现实和演进等原因．电信网络IP化的趋势不可阻挡,IP技术最成功的应用就是Internet,但30多年来Internet已经从教育科研走向了商业化应用,再加上技术和社会进步,相关政策的调整等原因,其核心设计理念“端到端的透明性”面临着严峻挑战,已经成为很多问题(尤其是商业模式和安全问题）的根源。因此,构建IP电信网不应是简单地在现有的IP之上增加业务控制、QoS和安全机制等,而是要更新Internet的设计理念,从体系架构开始重新考虑。     

A distributed architecture for multiplayer interactive applicationson the Internet

This article describes the design, implementation, and evaluation of MiMaze, a distributed multiplayer game on the Internet, and, more precisely, it describes the design of dedicated transmission control mechanisms. MiMaze is implemented on a completely distributed communication architecture based on the IP multicast protocol suite (RTP/UDP/IP). This is the first work to analyze a distributed interactive game on the multicast Internet. The major element of the MiMaze architecture is a distributed synchronization mechanism that guarantees the consistency of the game regardless of network delay. This article provides on evaluation of the MiMaze game on the MBone, and discusses approaches to monitor and evaluate this new type of application. The main contribution of this work is to show, based on on example, the feasibility of this new family of applications on a best-effort network. It is shown that real-time interactivity can be maintained, provided that some level of inconsistency can be tolerated by the application. This work also highlights the role of multicast as an enabling technology for a real-time Internet