EPON+EoC技术在HFC网络建设中的应用

随着"三网融合"的逐步推进以及居民对电视节目的多样性的需求,广电有线网络也逐渐由单向传送广播电视传统业务向宽带业务等多种综合业务发展。在这进程中,EPON+EoC技术日趋成熟,本文简述了什么是EPON接入方式,什么是EoC调制技术,并结合实际,阐述了如何利用EoC技术充分利用楼内现有的同轴电缆资源,完成双向网络改造,如何利用EPON+EoC组网方式开展多种综合应用。     

Policy options for broadband infrastructure strategies: A simulation model for affordable universal broadband in Africa

Goal 9 of the Sustainable Development Goals aims to provide universal affordable broadband globally. However, a lack of data, combined with few independent and scientifically reproducible assessments, makes it challenging for governments to make strategic choices to achieve this goal. Therefore, new research approaches are required to support decision evaluation. This paper demonstrates an innovative method that addresses data and model uncertainty by developing open-source software to explore affordable universal broadband strategies, using a scenario-based hypothetical mobile operator. Targets being considered by the United Nations’ Broadband Commission are evaluated, with the financial costs of different infrastructure decisions quantified for the whole of the African continent. The results suggest that ‘leapfrogging’ to 4G is more cost efficient than 3G for providing universal broadband, with savings between 7 and 57 % for 10 GB/Month and 20–47 % for 30 GB/Month. The baseline 4G cost for connecting all unconnected and underserved users across Africa is $0.4 trillion for 10 GB/Month and $0.7–1 trillion for 30 GB/Month.     

六安有线宽带管理系统的设计与实现

通过对六安有线宽带业务流程调研与分析,运用Workflow和SMS技术,实现了一个基于C/S架构的、与SMS短信平台无缝集成的有线宽带管理系统,以期实现对宽带业务的有效处理,提高工单作业调度的执行效率和准确度。     

EPS网络的语音业务解决方案

本文介绍了行业内比较成熟的几种EPS网络语音解决方案,分析了解决方案的特点和具体的实现机制,并结合中国CDMA网络运营商的实际网络情况,给出了相应的建议。     

The Adjustment on Service Structure and Strategic Orientation of Postal Service

1　Introduction1 1　PresentSituationofPostalServiceStructure　Table 1indicatesthatin 1 992theproportionofletters postservicerevenuecouldreachashighas1 7 2 %andtheNewspapersandPeriodicals (NandP)distributionrevenueoccupied 31 8% ,whilein2 0 0 2the proportionsofthetwodroppedinto1 1 0 % .Themajorreasonforthesituationisthatthedevelopmentofthenewservices,especiallythedevelopmentofEMSand postalsavingsservice .Sincetheletter postservicehasalwaysbeenmonop olizedbyChinapost,thepostoccupiesadomi…     

战术异构网络互联端到端QoS研究

战术异构通信网络的融合,需要更完善的端到端服务质量（Quality of Service,QoS）体系。在研究和分析战术异构通信网特点后,分析总结出战术异构通信网络端到端QoS研究内容,并参考下一代网络QoS框架结构,提出了基于策略的QoS架构模型。最后阐述了所涉及的关键技术,用于解决在战术异构通信网中不同业务在跨网络传输时端到端QoS保证,合理利用无线网络资源,有效提高数据传输性能等问题。     

信息传播产业融合下有线网络的核心竞争力

主要从人类对信息传播产业的期望,媒介产业和传播产业的融合发展趋势入手,对广电有线电视网络事业发展进行了简单SWOT分析,从而推导网络企业的核心竞争力和演变方向,并论述了在三网融合中如何建立、完善以及评估有线电视网络的核心竞争力的几个关键要素。     

一种无线座机锁小区的技术方案及系统

全业务运营环境下,为提升运营商竞争力,某移动公司推出无线座机业务,其业务资费比普通的号码套餐较为优惠.本文提出了一种无线座机锁小区的技术方案及系统,该方案及系统能主动适应复杂多变的无线环境和不断调整优化的无线系统,从而有效限制住无线座机终端的优惠范围.     

锦州市公共气象预报服务业务工作平台

为适应公众气象预报服务业务的需求,提高公众气象服务针对性、及时性、规范性和准确性,满足公众预报实时业务的需求,利用VB和Access数据库知识开发研制了锦州市公共气象预报服务业务工作平台。该平台可实现各种预报信息的调看,预报会商、公众预报、专业预报信息,决策预报的编辑、信息传输和查询,建立历史灾害性天气个例库和灾情库,并实现其查询功能;平台的建设规范了公共气象预报服务的工作流程,提高了预报员工作效率及预报水平。     

Non-Cooperative Games for Service Differentiation in CDMA Systems

In this paper, we address the problem of user-class based service differentiation in CDMA networks. Users are categorized into three classes who get differentiated services based on their expected quality of service (QoS) from the service provider and the price they are willing to pay. We adopt a game theoretic approach for allocating resources through a two-step process. During a service admission, resource distribution is determined for each class. Then, the resource allocated to each class is distributed among the active users in that class. We devise a utility function for the providers which considers the expected revenue and the probability of users leaving their service provider if they are not satisfied with the service. Our model demonstrates how power can be controlled in a CDMA network to differentiate the service quality. Also, we show the impact of admitting high paying users on other users. Mainak Chatterjee received his Ph.D. from the department of Computer Science and Engineering at The University of Texas at Arlington in 2002. Prior to that, he completed his B.Sc. with Physics (Hons) from the University of Calcutta in 1994 and M.E. in Electrical Communication Engineering from the Indian Institute of Science, Bangalore, in 1998. He is currently an Assistant Professor in the department of Electrical and Computer Engineering at the University of Central Florida. His research interests include economic issues in wireless networks, applied game theory, resource management and quality-of-service provisioning, ad hoc and sensor networks, CDMA data networking, and link layer protocols. He serves on the executive and technical program committee of several international conferences. Haitao Lin received the BE degree in radio engineering from Southeast University, Nanjing, China, in 1996, the MS degree in computer applications from the Beijing University of Posts and Telecommunications, Beijing, China, in 2000, and Ph.D. in Computer Science and Engineering from The University of Texas at Arlington in 2004. He is currently with Converged Multimedia Services System Engineering at Nortel, Richardson, Texas. His research interests include wireless network performance evaluation and enhancement, wireless link adaptation, wireless network resource management, and applied game theory. Sajal K. Das received B.S. degree in 1983 from Calcutta University, M.S. degree in 1984 from Indian Institute of Science, Bangalore, and Ph.D. degree in 1988 from University of Central Florida, Orlando, all in Computer Science. He is currently a Professor of Computer Science and Engineering and also the Founding Director of the Center for Research in Wireless Mobility and Networking (CReWMaN) at the University of Texas at Arlington (UTA). Prior to 1999, he was a professor of Computer Science at the University of North Texas (UNT), Denton where he founded the Center for Research in Wireless Computing (CReW) in 1997, and also served as the Director of the Center for Research in Parallel and Distributed Computing (CRPDC) during 1995–97. Dr. Das is a recipient of the UNT Student Association's Honor Professor Award in 1991 and 1997 for best teaching and scholarly research; UNT's Developing Scholars Award in 1996 for outstanding research; UTA's Outstanding Faculty Research Award in Computer Science in 2001 and 2003; and the UTA College of Engineering Research Excellence Award in 2003. He is also frequently invited as a keynote speaker at international conferences and symposia. Dr. Das' current research interests include mobile wireless communications, resource and mobility management in wireless networks, mobile and pervasive computing, wireless multimedia, ad hoc and sensor networks, mobile internet architectures and protocols, distributed and grid computing, performance modeling and simulation. He has published over 350 research papers in these areas in international journals and conferences, directed numerous industry and government funded projects, and holds five US patents in wireless mobile networks. He received four Best Paper Awards in the ACM MobiCom'99, ICOIN'01, ACM MSWiM'00, and ACM/IEEE PADS'97. He as the Editor in Chief of the Pervasive and Mobile Computing (PMC) journal and also as an Associate Editor of IEEE Transactions on Mobile Computing, ACM/Kluwer Wireless Networks, Parallel Processing Letters, Journal of Parallel, Distributed and Emerging Systems. He served as General Chair of IEEE WoWMoM'05, PerCom'04, IWDC'04, MASCOTS'02, ACM WoWMoM'00-02; General Vice Chair of IEEE PerCom'03, ACM MobiCom'00 and IEEE HiPC'00-01; Program Chair of IWDC'02, WoWMoM'98-99; TPC Vice Chair of ICPADS'02; and as TPC member of numerous IEEE and ACM conferences. He is Vice Chair of the IEEE Computer Society's TCPP and TCCC Executive Committees.