编号、命名和寻址研究的进展

首先就标识的种类及构成进行了说明．接着介绍编号、命名和寻址在国际、国内两方面研究的进展．最后指出了三者相融合的趋势。     

ITU关于国内编号计划描述方法的建议

对ITU-T建议E.129的产生背景、主要内容以及实施情况进行了介绍。     

基于跨平台的移动应用开发框架研究

随着我国经济的快速发展和科学技术水平的提高,智能手机、平板电脑等移动终端迅速普及,逐渐改变着人们的生活方式。与此同时,移动操作平台处于逐渐发展中,使移动应用程序如雨后春笋般不断涌现。目前,移动操作平台与应用程序的矛盾日益突出,对跨平台的移动应用有着更高的要求。因此,文章主要针对跨平台移动应用开发框架进行了论述。     

电话号码的弹性编号

在市场经济大发展的今天 ,客户都希望拥有一个满意的电话号码 ,于是使得某些电话号码放不出去 ,这不仅导致了交换机资源的浪费 ,还大大地降低了电信部门的经济效益。弹性编号方案则提供了一种有效利用那些资源的解决办法     

本地网网络智能化编号方案的选择研究

传统固定网络运营商因为移动电话分流、低端用户大量增加等原因,造成ARPU值不断下降。而且业务的创新和提供能力有限,不能满足用户业务综合化、独特化、个性化的要求,不能提供很多新业务,如彩铃、移机不改号等。因此,固网运营商纷纷开始计划利用智能网,通过引入多业务平台和多专业网灵活接入,为用户快速提供专业网内和跨网络组合的丰富业务。本地网固定电话号码的编号方案选择直接关系到交换机局数据的设置、各支撑系统的数据设置和业务流程的确定,因此需要在网络建设之前尽快明确。固网网络智能化的实现原理固网智能化采取类似移动交换机…     

电子编号简介

简要介绍了电子编号的起源、原理、特点和存在的问题。     

质量体系文件的分层和编号

介绍了质量体系文件分层和编号的原则和方法。     

有线电视光缆改造后的编号

这些年来 ,有线电视发展很快 ,随着光缆价格下跌和光接收机输出电平的提高 ,我们现在很容易做到光缆到楼头 ,也就是说取消楼头放大器 ,用光接收机直接带用户 ,这样不仅可以提高信号指标 ,增加网络的抗噪声能力 ,而且有利于实现网络的双向功能和提高网络的可靠性 ,大大降低维修量。兰化公司电视台在 2 0 0 2年底对所管辖区的一部分进行了光缆改造 ,这次改造的主导思想是 :①取消楼头放大器 ,直接用光接收机带用户 ,以减少有源器件的使用 ,提高信号质量 ,消除故障隐患 ;②光分配使用星树型结构 ,减少前端出纤量 ,同时降低总体造价 ;③每个光节…     

我国未来移动通信研究开发展望

本文简述了国内移动通信的发展现状与趋势，重点论述了国际上有关Beyond 3G移动通信发展动向，提出了我国发展未来移动通信的基本技术需求，概述了我国有关Beyond 3G研究计划-FuTURE计划的安排与步骤。     

移动通信的未来

在3G大规模商用以后,多媒体服务与应用将会得到广泛推广,而3G在速率、服务质量、无缝传输等方面的局限性也将日益显露出来,势必需要带宽更宽的无线系统。故移动通信的下一步必定是走向容量更大、速率更高、功能更强的4G,以在移动环境中支持高清晰度视像和其它宽带多媒体业务与应用。     

电力企业下一代网络平台的构建

本文从下一代网络技术的四个构成层次阐述了电力企业下一代网络通信平台的构建:采用以MSTP技术对电力传输网进行改造;建设IP+MPLS数据网络,保证网络平稳过渡到IPv6;以软交换为核心,促进网络融合,拓展新业务;利用3G业务助力电力行业     

对中国3G发展中一些问题的思考

文章依据中国经济发展水平及市场发展空间讨论了中国3G许可证的发放时机,根据3G手机、3G技术的进展情况分析了中国3G的市场成熟度,根据中国移动市场现状和国际经验估计了可能发放的许可证数量.文章还分析了3G需求不足的原因,并对可能会引导市场的3G业务进行了探讨.     

3G时代我国移动电子商务现状与发展策略

介绍3G技术对移动电子商务产业的意义,分析我国当前电子商务的现状与问题,探讨推动我国移动电子商务在3G时代大发展的策略.     

中国移动通信的产业模型分析

本文介绍了中国的移动通信产业从2G向3G发展过程中产业模型的结构以及发展趋势，在此基础上分析了3G阶段移动运营商、第三方业务提供商等企业的定位。     

3G时代位置服务技术研究

由于具备动态3D地图、POI实时更新、实时交通导航等2G时代不具备的特点,3G时代的位置服务必将获得广阔的应用前景。首先介绍了当前三大类主流定位技术——基于网络的定位技术、基于移动终端的定位技术和混合定位技术,并简要分析了COO、AFLT、AGPS、GPSOne等技术的优缺点;然后按被定位单元、位置服务核心子系统、位置服务业务子系统、监控和管理端四个子系统讲解了国内运营商所采纳的主流位置服务平台的体系结构,描述了PDE、MPC、LCSClient等主要网元的功能,最后以一个移动台发起的定位过程为例说明了3G时代位置服务的实现过程。     

Future Perspectives of the Unified Global Infrastructure

A novel approach towards the realisation of future communication systems is presented, highlighting some key research-areas, whose proper development will contribute to the development of the envisaged trends. The concept of a unified global infrastructure is the core of this vision approach. Key-elements that need to be analysed are identified together with the approach required for their effective investigation. This revised version was published online in August 2006 with corrections to the Cover Date.     

The Future Re-Visited

The future of telecommunications is to reach mass population in all regions of the world with services that will benefit humankind leading to the betterment of its and all life in our planet. Telecommunications and its services have to and will become part of life as is breathing to mankind. This future is by far not achieved and for some time to come whatever we develop there is always a next step to it. After all, that keeps our world going.Currently we are again at that stage of work on future generation communications where these words have not yet achieved a consensus. In this paper let us look at the crystal ball and try to materialize at least in words what we see in it [1–20].We first define fourth generation (4G) communication system and beyond 3G (B3G). Then we look at the requirements for future generation communications from the perspective of the users, the operators, and the service providers. Next the technologies that should and are being developed to materialize the future generation are discussed. A dip is also taken into the ongoing standardization or pre-standardization efforts. At first the introduction section tries to raise questions on the “future”.Prof. Dr. Ramjee Prasad, while being a father always there for his children, is also a visionary and a leader in the field of telecommunications. It is with pride and honour that I write in this paper, on the occasion of 60th birthday of my father, my thoughts of the future of telecommunications. I owe to him and my mother the knowledge that I present and the future that I have written of. It is from the spark that they had put in me that this vision of future was created thus the title “the future re-visited”. Disclaimer: This paper reflects opinion of the author not of NTT DoCoMo or DoCoMo Euro-Labs. Anand Raghawa Prasad Senior Member IEEE, project manager network level security model group, DoCoMo Euro-Labs, Munich, Germany was born in Ranchi, India. He received his Ph.D. degree in the field of WLANs: protocols, security and deployment and MSc (Ir.) degree in the field of Self Similarity in ATM Network Traffic from Delft University of Technology, The Netherlands, in 2003 and 1996, respectively. From 1996 to 1998 he worked as research engineer and later project leader in Uniden Corporation, Tokyo, Japan. From 1998 to 2000, he was distinguished member of technical staff and worked as systems architect for IEEE 802.11 based WLANs (WaveLAN and ORiNOCO) in Lucent Technologies, Nieuwegein, The Netherlands. Subsequently, he was technical director at Genista Corporation, Tokyo, Japan, and technical advisor of PCOM:I3, Aalborg, Denmark. He was a voting member of IEEE 802.11 and he is an active participant of 3GPP. In addition to his publications in journals, international conferences and chapters in books, he has 20$+$ patent applications in the field of wireless communications and has co-edited a book titled “WLAN Systems and Wireless IP for Next Generation Communications” and co-authored a book on “Wireless LANs and Wireless IP: Security, Mobility, QoS and Mobile Network Integration” both published by Artech House in 2002 and 2005 respectively. He is writing a book on “Security in Wireless Networks and Mobile Platforms” to be published in August 2006. He has participated in organizing of various International Conferences including VTC, PIMRC and WPMC. He was a guest editor of a special issue on “Security for Next Generation Communications” of the Springer Journal on Wireless Personal Communications and he is a guest editor of a special issue on “Seamless Handover in Next Generation Wireless/Mobile Communications” of Wireless Personal Communications.     

第四代移动通信系统研究

本文着重讨论第四代移动通信系统的结构、关键技术与网络协议,并与3G系统作了对比.文章最后阐述了4G的前景及对我国发展4G的建议.