6G算力网络:体系架构与关键技术

随着应用需求的不断拓展和科学技术的高速发展,现有网络逐步形成了较为成熟的无线感知、无线通信和泛在计算等多个功能体系,6G通信、感知、计算(通感算)融合趋势初现。其中,算力作为该融合系统的基石,为未来网络的发展提供了新的挑战和机遇。算力网络(Computing Force Networks,CFN)以“算网深度融合”为指导思想,利用发达的网络触角感知、连接和协同算力,提高算网资源利用率,满足网络智能化和新型业务的需求。首先概述了算力网络的发展历程和研究现状,总结了算力网络架构和关键技术,包括算力度量和建模、算力感知和路由、算力调度等,最后探讨了技术挑战和未来发展方向。     

泛在网融合需求凸显 “全IP化构架+多样化终端”成利器

泛在网的发展已将商业模式改变成价值链驱动的双边市场模型,并将进一步考验其产业链深度合作能力。近年来,在物联网、互联网、电信网、传感网等网络技术的共同发展下,实现社会化的泛在网也逐渐形成。而基于环境感知、内容感知的能力,泛在网为个人和社会提供了泛在的、无所不含的信息服务和应用。     

一种开放式的泛在网络体系架构与标准化研究

对下一代泛在网络的体系架构以及关键技术进行了研究和探讨,提出一种开放式的泛在网五层体系架构:感知层、接入层、传输层、中间件层以及应用层;并对泛在网在未来发展过程中所需用遵循的标准及规范等进行了分析和比较,以期为泛在网的应用提供借鉴。     

无线数字家庭网络泛在接入技术

数字家庭网络是通信领域的一个重要分支，近年来发展非常迅速。基于电信网络的数字家庭网络体系结构在中国已经标准化，但就接入方式而言，只是定义了可以使用无线方式，如何组建无线数字家庭网络是未来研究的重点。文章提出了无线数字家庭网络泛在接入概念，给出了无线泛在接入网络体系结构，并就其中的关键技术进行了探讨，包括感知无线电、无线网状网（Mesh）网络理论、通用接入点链路转换机制、业务的QoS保障机制以及电磁兼容和异构系统共存机制等。     

IPV6技术在泛在网感知延伸层的应用及标准化现状

介绍了泛在网络的基本概念、内涵以及网络架构,概括了泛在网感知延伸层的关键技术,重点分析了感知延仲层IP技术路线,IPv6技术感知延伸层的应用以及相关国际标准化现状。     

物联网关键技术及其应用

阐述了物联网的发展过程、定义、组成,以及物联网与传感器网络、泛在网络的相互关系;分析了涉及物联网的几种关键技术及可能的解决方案：无线射频识别技术、无线传感网技术、中间件技术、云计算技术、信息安全技术、异构网络与通信技术等;总结并展望了物联网最先可能的应用领域和应用前景。     

下一代移动无线互联网络的发展趋势

随着无线网络逐步向着高速化、宽带化、智能化、泛在化的特性发展，各种各样的无线通信技术接踵而至，带来了丰富的异构性．为满足人们对业务的需求，提出了一种新颖的网络构架——移动泛在业务环境（MUSE），MUSE构架的设计还面临着一些技术上的难题．未来网络发展的主导趋势是以IP核心网为平台，进行网络的融合演进和协同优化．     

泛在传感器网络的发展和分析

阐述了未来泛在网络从人与人通信向物与物通信的发展前景,介绍了当前传感器网络行业的应用和典型技术特点,并对传感器网络与电信网融合、形成泛在传感器网络发展过程的阶段和问题进行了分析。     

泛在网络的技术、应用与发展

泛在网络已经被公认为是信息通信网络演进的方向。泛在网络利用网络技术,实现人与人、人与物、物与物之间按需进行信息获取、传递、存储、认知、决策、使用等服务,网络将具有超强的环境、内容、文化、语言感知能力及智能性。泛在网络包含电信网、互联网以及融合各种业务的下一代网络,并涵盖各种有线无线宽带接入、传感器网络和射频标签技术（RFID）等。许多国家都从长远发展角度提出了泛在服务概念和相应的国家战略。本文结合信息社会战略阐述了泛在网的内涵、关键技术、新型的服务,并与IBM提出的智慧地球的内涵做了对比分析。     

全业务环境下多媒体视频通信发展趋势分析

一、未来信息通信网络演进发展走向 纵观全球无线移动通信发展．呈八大走势,即宽带移动化、移动宽带化、传输IP化、接入多样化、网络自适应化、系统互补综合化、应用个性／普适／泛在化及网络、有线、无线、“三网”融合一体化。     

物联网的技术路线及属性形成

区别于传统强调人与人连接的互联网,物联网是互联网的技术扩展和应用延伸。本文阐述了物联网融合传感器网络、EPC系统和泛在网络的泛在多元信息获取方式,利用电信网、互联网以及广电网等通信网络和各类接入网络实现泛在数据传送,为社会不同行业的应用需求提供泛在服务能力。指出物联网的技术路线是在现有互联网的基础上,通过借鉴和吸收相关学科的研究和应用成果,形成的一个物理空间与虚拟空间、人与物交叉融合的信息服务基础平台;物联网的根本属性是泛在化,即泛在网络,具体体现在泛在互联、泛在技术支持和泛在应用整合等方面。     

Positioning in WLAN environment by use of artificial neural networks and space partitioning

Short range wireless technologies such as wireless local area network (WLAN), Bluetooth, radio frequency identification, ultrasound and Infrared Data Association can be used to supply position information in indoor environments where their infrastructure is deployed. Due to the ubiquitous presence of WLAN networks, positioning techniques in these environments are the scope of intense research. In this paper, the position determination by the use of artificial neural networks (ANNs) is explored. The single ANN multilayer feedforward structure and a novel positioning technique based on cascade-connected ANNs and space partitioning are presented. The proposed techniques are thoroughly investigated on a real WLAN network. Also, an in-depth comparison with other well-known techniques is shown. Positioning with a single ANN has shown good results. Moreover, when utilising space partitioning with the cascade-connected ANNs, the median error is further reduced for as much as 28%.     

支持动态策略更新的半策略隐藏属性加密方案

基于密文策略的属性加密被认为适用于云存储的环境,但当数据拥有者需要更新访问策略时,现有的更新方式因受数据的规模和属性集的大小的限制,会使数据拥有者增加相应的计算开销和通信开销。同时,以明文形式存放在云端的访问策略也会造成用户数据的隐私泄露。针对以上2个问题,提出了一种支持动态策略更新的半策略隐藏属性加密方案,使用所提方案进行策略更新时,用户的计算开销减少,大量的计算由云服务器承担。由于使用了半策略隐藏,用户的具体属性值不会泄露给其他任何第三方,有效保护了用户的隐私。此外,所提方案可以支持任何形式的策略更新,在标准模型下证明了方案是自适应选择明文攻击（CPA）安全的。     

泛在传感器网络标准体系与系统架构研究

作为必不可少的顶层设计和路线指南,标准体系和系统架构的研究在泛在传感器网络标准制定过程中占据着极为重要的地位,关系到泛在传感器网络标准制定的方向和成败。本文在介绍了传感器网络国际和国内标准化现状的基础上,探讨了传感器网络标准体系和系统架构的研究工作。     

Ambient network composition

Ambient networks, a product of a European union sixth framework project, is a novel networking paradigm for beyond 3G. It aims at the ubiquitous provisioning of existing and new services over any access technology and any type of network. Network composition is a core feature of ambient networks. It enables on-demand and transparent cooperation between heterogeneous networks, with little or no pre-configuration or off-line agreement. This article provides an overview of ambient network architecture and discusses composition concepts and techniques. The key concept is the composition degree. It is the level of cooperation between the composing networks. It ranges from network interworking, where each composing network keeps control of its resources, to network integration, where all of the composing networks merge into a single network. Network composition is a phased process. The techniques include the mechanisms that enable the interactions between the composing networks during each phase of the process. These mechanisms rely on general ambient network signaling, a signaling system based on the IETF next step in signaling framework. We introduce the ambient network architecture, review the composition degrees, present the composition techniques, and discuss how ambient network composition has been validated.     

REALISM:一种面向未来异构无线网络演进的架构

未来无线通信系统将是各种无线接入技术和标准的融合,包容各自独立的网络,形成通用的平台并以简便的协议和信令操作,来实现异构网络融合是我们提出REALISM(REconfigurable:Adaption Layer for Integrated SysteM)的初衷,它通过在协议栈添加适配层(REAL:REconfigurable Adaption Layer),为由WLAN和UMTS组成的无线异构网络提供了融合的平台.文章重点关注了REALISM架构中的主要功能模块;然后描述了无线资源管理方面功能的实现,并以切换管理,例进行详细阐述.     

Special issue on system-integrated intelligence. New challenges for product and production engineering

The ubiquitous development of information and communication technology enables new opportunities for products as well as for production and manufacturing systems. These systems will be able to learn and adapt their behaviour during the systems operation for a continuos optimization. This results in an increasing structural complexity and dynamics of products, production networks, processes and organizations, which in turn requires an on-going adaption and reinvention of the organizing principles and solutions. Therefore, new products as well as their corresponding production and logistic processes spawn research activities in the field of advanced information techniques and system integrated intelligence to cope with the complexity and dynamics of future manufacturing networks.     

Influence of GMPLS Recovery Mechanisms on TCP Performance

Optical networks based on wavelength-division-multiplexing (WDM) techniques are very likely to be omnipresent in future telecommunication networks. Those networks are deployed in order to face the steady growth of traffic, which is for a large part Internet related. In the resulting IP-over-WDM scenario, TCP/IP constitutes an important fraction of the traffic transported over these networks. As IP networks are becoming increasingly mission-critical, it is of the utmost importance that these networks (and hence the supporting transport networks) be able to recover quickly from failures such as cable breaks or equipment outages. To that end, several IP-over-WDM network scenarios and corresponding protection and restoration strategies have been devised. It is clear that some trade-offs will have to be made in order to choose an appropriate strategy. In this paper, we investigate the effects of such recovery actions on the behavior of TCP, being the ubiquitous protocol used by today's network users. We examine the influence of different parameters such as the speed of recovery actions, changing length of the routes followed by the client data (TCP flows), changes in available bandwidth, etc. Thereby, we focus on what the TCP end-users care about, i.e., the number of bytes transported end-to-end within a certain time interval.