飞利浦：Nexperia和EDGE Nexperia提升3G终端标准

皇家飞利浦电子公司2月17日推出全新多媒体移动系统解决方案，提升了下一代3G手机的规格标准。Nexperia移动系统解决方案7210以低功耗提供丰富的娱乐功能，新手机开发商可以实现包括先进的音频、视频、数字视频广播以及FM收音机等功能。整个解决方案支持UMTS EDGE双传输模式（DTM），无论消费者身处哪个网络，都可以在任何时间、任何地点方便地获得丰富的多媒体体验。     

移动时尚生活新的解决方案

皇家飞利浦电子公司推出全新多媒体移动系统解决方案,提升了下一代3G手机的规格标准。NexperiaTM移动系统解决方案7210以低功耗提供丰富的娱乐功能,新手机开发商可以实现包括先进的音频、视频、数字视频广播——手持设备(DVB-H)和FM收音机等功能。整个解决方案支持UMTS EDGE双传输模式(DTM),无论消费者身处哪个网络,都可以在任何时间、任何地点方便地获得丰富的多媒体体验。由于3G网络的部署仍处于早期阶段,网络的覆盖尚不能遍及所有地区。3G手机用户希望能在任何时间、任何地点获得多媒体服务。Nexperia移动系统解决方案7210具有…     

西门子 按步就班

西门子首款200万像素可拍照手机 SXG75是西门子第一款200万像素照相手机．由于支持支持WCDMA／UMTS网络．因此该机也采用了双镜头配置。其中主镜头为200万像素，副镜头为10万像素可轻松实现双向视频通话功能。作为西门子手机的特色．SXG75拥有眼花缭乱的各种功能应用。如内置MP3播放器和FM收音机功能，支持3D Java游戏。可在手机上浏览Word、Excel和PDF文档。     

基于ARM的车载音响设计与研究

本文设计了一种基于32位ARM微处理器的多媒体车载音响,带Radio、IRDA、MP3、DVD等功能。文中结合汽车车身的复杂环境,给出系统软硬件设计以及系统各部分功能的实现方法,主要介绍了收音机、MP3的设计和系统集成。     

基于嵌入式数据库的EPON网络管理系统

设计实现了一种基于嵌入式数据库 SQLite的EPON网络管理系统,阐述了嵌入式数据库结构的设计过程,以及对OLT芯片功能进行二次封装的方法,最终调试验证了在单板系统中支持Web浏览器和Telnet命令行两种模式下的网络管理功能.     

基于Si472x设计实现DSP收音机

基于Si472x单晶片数字收音机芯片和低功耗数字信号处理器TMS320VC54x系统设计和实现DSP FM收音机.收音机以TMS320VC54x为控制核心,实现全频手动和自动搜台功能.重点阐述了Silicon Laboratory公司的Si472x芯片的工作原理及特性以及收音机相关硬件电路的设计,并对软件设计流程和设计的测试结果做了简单描述,为单晶片DSP收音机的设计提供了借鉴.     

移动网络中数据库的功能与实现

GSM数字蜂窝移动通信系统是当今应用最广泛的数字移动通信系统,它在网络功能上具有明显的优势,而移动网络功能的实现在很大程度上依赖于网络中的各种数据库,如HLR、VLR、AuC、EIR等。本文针对数字移动网络中主要的数据库HLR/AuC,讨论了其所支持的网络功能及系统的实现设计。     

Si484x多波段接收器实现RF性能与BOM成本的完美平衡

新一代Si484x实现高性价比Silicon Laboratories(芯科实验室有限公司)日前宣布推出新一代多波段无线电接收器IC解决方案,使轮调收音机产品具有现代的数字显示功能。基于专利技术的低中频数字架构,Si484x接收器采用的CMOS工艺提供了非常高的集成度,减少了超过70%的无线电器件数量,极大地降低了BOM成本和PCB面积,特别适用于具有数字显示和机械轮调收音机功能的设备,例如桌面和便携式收音机、立体声音响、迷你/微型系统、外放、时钟收音机、外挂电台、收音机玩具以及其它消费电子产品。Silicon Labs公司的Si484x接收器为年产量4千万台     

未来IP QoS的选择:MPLS与区分服务结合

本文首先简要描述了区分服务和MPLS网络。在此基础上,详细分析了区分服务MPLS网络的体系结构框架和区分服务LSR的内部结构、区分服务LSR的标签转发模型、两种支持区分服务功能的LSP及对信令系统的扩展。最后,分析比较了两种实现方案。     

一种基于4G和5G融合信令网关接入的浮空平台应急通信系统组网方式

研究基于空间平台的应急通信系统网络结构,实现创新是非陆地接入网络（NTN）的热门前沿技术。本文提出一种基于4G和5G融合信令网关接入的浮空平台应急通信系统组网方式,并给出了网络架构、信令面和用户面协议栈、信令网关主要功能特点,为建立适应空间平台特殊环境的新型应急通信系统网络提供了技术解决方案,以期为支持应急通信系统特色解决方案的功能开发奠定基础。     

The SENSEI project: integrating the physical world with the digital world of the network of the future - [global communications newsletter]

The Internet extends its reach to the real world through innovations collectively termed the Internet of Things (IoT). The IoT aims at integrating technologies such as radio frequency identification, wireless sensor and actuator networks (WSANs), and networked embedded devices. Recent ideas envision the Internet as an all encompassing infrastructure that connects the physical into the digital world: the real world Internet (RWI). The European project SENSEI plays a leading role within the current efforts to create an underlying architecture and services for the future Internet and to realize the vision of the RWI.     

流媒体技术在广电网络中的应用

随着广播电视和因特网的结合,视音频信息的频繁交换,多媒体广播已成必然,并逐渐成为人们信息交流的主要载体。主要介绍了流媒技术基础、流式传输基本原理、流媒体服务平台、流媒体技术在广电的应用。     

Opportunistic channel allocation decision making in cognitive radio communications

The global spread of wireless devices with mobile Internet access and the increasing demand of multimedia‐based applications are fueling the need for wireless broadband networks. IEEE 802.16 and 802.20 are standards for a broadband wireless access with promising cognitive radio features to support mobile Internet access. However, because of the fast changing radio environment and the demand for dynamic spectrum allocation mechanisms, these standards must continuously readjust different radio parameters. The cognitive radio makes decisions based on its built‐in inference engine, which also in time can adapt itself to different situations through the process of learning from experience. In this paper we present an automated opportunistic decision making and learning process for cognitive radio based on uncertainty reasoning algorithms. This novel approach is well suited in fast changing wireless environments with vague, incomplete, and heterogeneous information. Theory and simulations prove that decision making and learning of the cognitive radio based on the proposed approach cope with the changes in the radio environment. In this work we use fuzzy logic for the learning and decision making of the cognitive radio. Simulation also show that our approach provides accurate and precise decisions on allocating spectrum to mobile Internet users even in fast varying radio conditions. Copyright © 2012 John Wiley & Sons, Ltd.     

互联网传播视听节目监管系统的设计与实践

本文介绍广东省互联网传播视听节目监管系统的建设背景、设计思路、运行状况,重点介绍系统的结构与实现,并对系统如何适应视听节目传播技术的发展进行探讨,提出使用元搜索技术以提高效率的思路。     

Architecture of Ubiquitous Mobile Internet

With shortcomings in its original design,the Internet is limited in its capacity to meet increasing demands from ubiquitous mobile users. This paper discusses a new architecture for ubiquitous mobile Internet as well as the models and theories of its two layers. The infrastructure layer allows users to access the Internet anywhere,anytime,and by any means,while the pervasive service layer supports a variety of services. This paper proposes a mobility management mechanism under the new architecture. Experime...     

物联网时代的广电网络

结合目前广电网络双向改造的现状,阐述了广电网络在物联网发展方面的优势,提出在现有基础上进一步加大物联网建设的力度,加快物联网技术在广电系统的开发和应用,并给出了广电物联网平台的搭建,建议广电运营商抓住机遇,大力发展物联网。     

The digital turn in radio: A critique of institutional and organizational modeling of new radio practices and cultures

This article conducts a critical analysis of the use of Internet and mobile phone technologies by Capital radio in Malawi. It examines the uses of the Internet, social networking sites and mobile text-messaging by the radio station. Three central questions constitute the major concerns of the article: (a) To what extent do institutional and organizational contexts shape the uptake and uses of the Internet and mobile phones by radio journalists? (b) How do the uses of the Internet and mobile phones in turn influence the institutional cultures and organizational practices? (c) To what extent, if at all, does radio convergence reconfigure traditional radio to create new spaces that augment audience participation? The article argues that any meaningful critique of the technological affordances to the radio institution must critically engage with the complex questions of the dialectical relationship between technology, structure, and agency especially given the seductive myth of the so- called new media. It concludes that digital media technologies on radio are subject to organisational, institutional, and social shaping, and that questions about the emancipatory power of these technologies especially to audiences and citizens are often exaggerated because the question of power relations between actors or interests is often overlooked. The digital turn and the demotic turn on radio therefore must not be seen as synonymous with the participatory turn, especially in African countries where the regulation of corporate power in mass media is weak and where multiple forms of the digital divide that impede on consistent and meaningful use of digital media still persist.     

Wireless Everything - Unwiring the World

Wirelessness and radio technologies have been at the heart of many disruptive businesses and activities. This paper argues that this trend will continue as new research topics and novel ways to use existing techniques have an impact on both business and society. It discusses the fundamental issues of wireless and mobility, and looks beyond today's business environment to highlight potential future disruption. Some (potential) wireless disrupters are examined and the road to 3G cellular radio is discussed. Wirelessness has been coined to describe the spread of radio and mobile technology. The paper further discusses the way more and more people and artefacts will be networked wirelessly as the Internet moves in new directions and generates further disruption in its wake.     

Determinants of social gratifications obtained by older adults moderated by public supports for Internet access in Spain

As the standard of living constantly improves, and as life expectancy increases in developed countries, the number of adults who want to have a gratifying life increases as well. Furthermore, although the Internet offers a world of potentially rewarding experiences, there is much heterogeneity among older people with respect to those who are able to benefit from its use. To reduce this gap, public access and digital literacy programs have been implemented. The aim of the study was to find out the extent to which these programs moderate the effects of age and socioeconomic status on social access to and use of the Internet in a sample of older users in Spain. Through quota sampling of retired users over 54 years of age in Spain (N = 560), who were regular users of public supports for Internet access, a structural equation modeling and multi-group analysis was conducted. The data showed a staggered association of access indicators (physical access, digital skills and social e-activities) on the social gratifications obtained, as well as the moderating role of institutional supports. This study provides empirical evidence of the ability of public supports to moderate the effect of socioeconomics inequalities on access and social exploitation of the Internet by older people. The findings point to the need to strengthen digital literacy actions, especially in supports that are more sensitive to the effect of age and socio-economic status.     

Overview of mobile WiMAX technology and evolution

Mobile WiMAX is a fast growing broadband access technology that enables low-cost mobile Internet applications, and realizes the convergence of mobile and fixed broadband access in a single air interface and network architecture. Mobile WiMAX combines OFDMA and advanced MIMO schemes along with flexible bandwidth and fast link adaptation, creating a highly efficient air interface that exceeds the capacity of existing and evolving 3G radio access networks. WiMAX networks, built on all-IP network architecture for plug and play network deployments, can support a mix of different usage and service models. While some consider mobile WiMAX as a candidate for the fourth generation of mobile networks, others view it as the first generation of mobile Internet technologies emerging from a wider ecosystem targeting to extend the success of WiFi over wide area networks supporting mobility. This article provides a high-level overview of mobile WiMAX technology and its evolution roadmap from both radio and network perspectives.