适应3G及下一代网络演进的中国频率规划和频谱管理策略(下)

3 宽带无线的频率规划和频谱资源管理策略。3．1全面修订中国无线电频率划分规定。对发展新技术、新业务而言，频谱资源规划和分配必须先行。为了使我国的无线电频率规划适应国际、国内电信新环境并与国际接轨，必须首先使我国的“无线电频率划分规定”与国际电联(ITU)的最新世界无线电通信大会(WRC)及其确定的国际无线电规则接轨。据此，信息产业部无线电管理局予     

我国陆地无线移动通信业务频率安排

一、无线电频带和波段命名根据国际电联规定，无线电频带和波段的命名见表1。二、我国陆地无线移动通信业务的频率安排根据《中华人民共和国无线电管理条例》和国家有关无线电管理的方针、政策，在规划无线电业务的频率或频段时，一般要遵循以下原则：1．统筹考虑各种无线电业务的实际需求，使其各得其所，促进各种无线电业务的健康发展。2．选择技术成熟、先进可靠、应用广泛的标准和体制，在新技术新业务中，选择频谱利用率高的技术。3．在规划新技术、新业务的频谱需求时，应充分考虑我国频谱使用的现实状况，包括国内有关运营、科研、生…     

当选ITU-R研究组管理层领导职务的中国专家

谢飞波：ITU—R词汇协调委员会副主席 现任工业和信息化部无线电管理局局长，国际电联无线电通信部门（ITu—R）语言词汇协调委员会副主席。教授级高级工程师。长期从事无线电管理工作，曾主持开展了第三代移动通信、无线接入等无线电新技术与新业务的频率规划工作。2007年，当选为国际电联无线电通信部门（ITu—R）词汇协调委员会副主席。2012年1月，成功连任词汇协调委员会副主席。     

中国宽带无线频率规划及相关策略考虑

针对国内外电信新环境，本从全面修订中国无线电频率划分规定，进行频谱有偿使用与运营执照发放改革，积极进行新一代宽带无线接入与宽带移动通信的频率规划，处理好市场驱动与技术驱动的关系等10个方面发表了对中国宽带无线频率规划及相关策略的看法，其中对频谱/轨道资源有效利用新技术进行了较详细讨论。     

《中华人民共和国无线电频率划分规定》修订的相关情况说明

今年１１月１２日，新修订的《中华人民共和国无线电频率划分规定》（以下简称《无线电频率划分规定》）颁布施行。现对此次修订工作的原则、栏目设计思想、修改结果等做下述简要说明。一、修改原则（一）此次修改《无线电频率划分规定》继续贯彻执行“为国家首脑机关、国防建设和经济建设服务，中心是为经济建设服务”这一无线电管理基本指导思想。我局进行频率规划时遵循我国对内、对外一贯强调的下述基本原则：１．统筹考虑各类无线电业务的实际需要，促进所有业务健康发展。２．在规划新技术、新业务的频谱需求时，充分考虑我国频谱使用…     

中国宽带无线频率规划、频谱管理及相关策略考虑

针对国内外电信新环境,文章从全面修订中国无线电频率划分规定,进行频谱有偿使用与运营执照发放改革,积极进行新一代宽带无线接入与宽带移动通信的频率规划,处理好市场驱动与技术驱动的关系等10个方面发表了对中国宽带无线频率规划,频谱管理及相关策略的看法,其中对频谱/轨道资源有效利用新技术进行了较详细讨论。     

科学规划频率服务经济社会2007年无线电频率规划专家咨询委员会会议在京召开

为做好出席2007年世界无线电通信大会（WRC-07）的准备工作，合理规划我国无线电频率资源，2007年3月23日，无线电频率规划专家咨询委员会会议在北京召开，对未来移动通信的发展空间及无线电资源的可持续有效利用等问题进行了探讨，并对近期无线电频率资源规划提出了咨询意见和具体建议。     

无线电频率资源应以自然资源规划方法合理配置

随着我国市场经济和无线通信事业的快速发展,无线电频率资源的供需矛盾日益突出,传统的行政审批模式,难以适应市场经济发展的要求。2001年至2005年,我国无线电管理部门先后在一些城市,面向有资质的运营商进行了3．50Hz频段宽带无线接入频率招标分配工作。这是我国无线电频率资源管理,开展市场机制调节、优化资源配置的有益尝试。不仅对各种潜在的需求有了充分的了解,有利于提高无线电频率资源的利用率,而且有利于促进电信市场的有序竞争,有利于促进无线电新技术、新业务的应用和发展。为此,科学合理地进行无线电频率资源配置,已经成为—项重要的课题。     

3G时代的频率划分

无线电频谱从来没有像现在这样拥挤过，曾经被认为几乎是具有无限容量的无线电频率，正在被蜂拥而至的智能手机和其他无线设备抢占。各种无线新技术的不断涌现，RFID、UWB和ZigBee等近距离无线技术，Wi-Fi、WiMAX等宽带无线局域网技术，CMMB、DVB-H等广播电视接入技术，     

感受无线技术发展未来脉动--从2005中国无线技术大会看产业界前沿趋势

11月1日至3日，业界关注的2005中国无线技术大会（Wireless China 2005）在北京开幕。来自信息产业部的政府官员、业界专家、各大电信运营商的代表及相关设备厂商，围绕无线电领域的新技术和新应用，就无线电管理政策、技术发展趋势和应用推广等议题展开了广泛深入的交流和研讨。     

GEMNET: a generalized, shuffle-exchange-based, regular, scalable,modular, multihop, WDM lightwave network

GEMNET is a generalization of shuffle-exchange networks and it can represent a family of network structures (including ShuffleNet and de Bruijn graph) for an arbitrary number of nodes. GEMNET employs a regular interconnection graph with highly desirable properties such as small nodal degree, simple routing, small diameter, and growth capability (viz. scalability). GEMNET can serve as a logical (virtual), packet-switched, multihop topology which can be employed for constructing the next generation of lightwave networks using wavelength-division multiplexing (WDM). Various properties of GEMNET are studied     

Thermodynamics of copper matte converting: Part III. Steady-state volatilization of Au,Ag, Pb,Zn, Ni,Se, Te,Bi, Sb,and As from slag,matte, and metallic copper

A comprehensive compilation of various thermodynamic data required for a complete analysis of copper matte converting reactions is presented. The data comprise estimated free energies of formation for such gases as SeO, SeS, TeO, TeS, BiO, BiS, SbO, SbS, AsO, and AsS, as well as activity coefficients in dilute copper alloys and vapor pressures of various elements and compounds. The volatilization of minor elements in steady-state reactors comprising gas and several condensed phases is mathematically formulated, and a parameter which governs the volatilization in such reactors is defined and named volatilization constant. The vapor pressures of various volatile species are calculated thermodynamically for the Noranda Process reactor by assuming equilibrium conditions. The volatilization constants of various minor elements are expressed explicitly as functions of oxygen and sulfur activities. Formerly Associate Professor, Department of Metallurgical Engineering, University of Utah, Salt Lake City, UT     

Bits, symbols, bauds, and bandwidth

The use of clear, concise, and unambiguous language in telecommunications engineering is vital to communicate a desired meaning and understanding. Terminology should be based on rigorous engineering principles and traceable to well known and dependable sources. This article deals with four everyday terms commonly encountered in the popular semi-technical press as well as in serious engineering periodicals. The misuse of these and other terms can lead to low-balled cost proposals, court litigation, and patent infringement cases. Imagine how an engineering student can be confused when she/he typically encounters bandwidth measured in bits per second     

Novel planar, square-shaped, dielectric-waveguide, single-, and dual-mode filters

This paper presents a novel concept of a square-shaped dielectric-waveguide resonator, which can easily realize a dielectric-waveguide cross-coupled filter or a dielectric-waveguide dual-mode filter, using the conventional printed circuit board (PCB) process. This planar dielectric-waveguide resonator has a higher Q value than a microstrip resonator. The physical mechanisms of both single- and dual-mode filters are elucidated. Some new coupling structures are developed for undergoing the PCB process. Filter design procedures are detailed. Design curves for the coupling coefficients of internal- and external-coupling structures are determined by full-wave finite-element-method electromagnetic calculations. Measurement results are highly consistent with theory for all trial filters. This study offers an effective means of producing low-cost high-performance planar circuit filters.     

PBX技术.市态.营销.选购

本文介绍了ＰＢＸ交换机的技术及市场需求态势。并提出ＰＢＸ产品的营销要素及其用户在选购时应遵循的原则。     

Dilemmas,uncertainty, risks,and board performance

This paper traces the origins of the words risk, uncertainty, governance and development and argues that a deeper understanding of each allows more effective decision taking in the boardroom. It argues that the role of the board of directors is to balance and rebalance continuously their irresolvable dilemma — ‘how do we drive our enterprise forward while keeping it under prudent control?’ It argues that it is the board’s role to focus on uncertainty, rather than risk, and this requires a different set of intellectual skills from board members to be able to cope with monitoring a range of diverse scenarios. This is crucial for a board to develop stronger ways of both leading their organisation and of ensuring the connectedness of the learning within and between the board and the operational unit’s risk taking. It advocates that to achieve this a board must develop new ways of learning — especially of thinking strategically and becoming more sensitised to the dynamics of their changing external environments. This will take them well beyond the comforts of their specialist managerial disciplines and into the true world of directing. The paper demonstrates the importance of continuous learning in reducing organisational uncertainty and risk. It uses the ‘Learning Board’ process and model as the central processor of both strategic and operational learning to create an annual rhythm for the board’s year.