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光纤与激光被誉为20世纪光学领域中两个最伟大的工程成就,光纤骨干通信网络已经成为支撑互联网的基石,光纤到户成为解决宽带通信接入最后一公里难题的必然选择。而随着近年物联网新兴战略产业的崛起,光纤传感技术也将迎来新一轮的发展高潮。 相似文献
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本文介绍了ADSL宽带和光纤宽带接入技术及其特点,结合"城市化"建设的有利契机,紧跟市场的变化,大力发展光纤接入技术、普及光纤宽带网络对开展创收途径具有积极意义。 相似文献
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随着互联网的迅猛发展,新业务层出不穷,人们对接入带宽的需求越来越高,而宽带光纤接入技术的快速发展,为实施接入网络的转型升级,加速FTTx建设奠定了基础。作为移动运营商,为克服城区铜缆资源缺乏的不足,积极采用新的光纤接入技术,为用户提供高带宽、多业务的综合接入能力,是适应业务发展需求,应对市场环境变化,促进网络转型的重要举措之一。本文主要结合当前宽带光纤接入技术和业务需求,对移动运营商PON技术的应用和网络建设进行了探讨。 相似文献
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正在人类的发展过程中,科学技术总是扮演着历史推动者的角色。每一次技术革命,都引领人类迈进新的时代。光纤与激光被誉为20世纪光学领域中两个最伟大的工程成就,光纤骨干通信网络已经成为支撑互联网的基石,光纤到户成为解决宽带通信接入最后一千米难题的必然选择。而随着近年物联网战略新兴产业的崛起,光纤传感技术也将迎来新一轮的发展浪潮。 相似文献
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基于Cable Modem技术的VoIP话音解决方案 总被引：2，自引：0，他引：2
随着有线电视技术的不断进步，有线电视HFC网已从单向传输的分配式网络，逐步朝双向多功能业务网络方向演变。宽带和高入户率两大特点已使HFC网成为一种主要的宽带接人手段，利用线缆调制解调器(Cable Modem，下简称CM)实现宽带上网是目前该网的普遍应用之一。其实，由同轴电缆和CM系统组建的宽带接入网本身就是一个基于TCP／IP协议的能传输各种音、视频业务的IP网络，在IP网络上传输话音信号，代表了目前话音通信发展的方向，为在基于CM技术的宽带网上开展话音业务提供了坚实的技术保障。 相似文献
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随着科技的发展和网络技术的普及,通信网络技术在人们的日常生活中发挥的作用越来越大,给人们的生活带来了很大的便利。光纤传输作为通信网络信息传输的主要传输技术使通信网络建建的更为完善。本文对光纤技术进行了研究,对光纤传输技术的现状及其在通信网络中的作用以及应用进行了深入探讨,以期能够促进信网络实现更好的发展,更好的服务于人们工作生活。 相似文献
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Stanley M. Besen 《The Information Society》2013,29(3-4):359-380
Abstract In the past several years, the number of sellers from whom customers of telecommunications network services can choose has increased dramatically. Whether it is the provision of domestic long‐distance service, or the offering of international telecommunications, or even the delivery of local communications, where previously service was provided by one firm or by a stable handful of firms that shared a market, users now have a wider range of choice and this increase in the scope of choice is likely to continue into the future. These changes, the result of a combination of developments in technology and regulatory policy, have created new problems for those charged with the regulation of telecommunications. This paper begins by tracing the changes in regulatory policy that have led to the increase in the number of suppliers of domestic long‐distance telecommunications service. Then, it examines a number of principles for pricing telecommunications network services. Next, it identifies a number of explanations that have been offered for the proliferation in network services that has occurred. It then attempts to draw lessons from developments in the long distance market for the future of local network service. Finally, the paper explores the difficulties that policy‐makers will face in the new, more competitive environment. 相似文献
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AbstractThere is a paucity of granular, high-resolution broadband data in the United States, which limits the prospects of informed telecommunications policy debates. In the absence of regulation requiring telecommunication providers to accurately report service footprints, pricing, and service quality data, providers refuse to disclose this information, routinely citing competition as the primary reason for keeping network and pricing data obfuscated. In addition, many secondary datasets needed for broadband planning and policy research, such as parcel or address point data, are equally challenging to gather. These datasets are often controlled by county governments, with no overarching access policy, resulting in neighboring counties with widely divergent policies for the release of these important data. In this article we explore the challenges of open data and its impacts on telecommunication policy development. A recent project which explored the spatial provision of Google Fiber in the Kansas City metropolitan area helps to highlight these difficulties. Basic strategies for mitigating information asymmetries and the lack of data transparency for telecommunication policy analysis are discussed. 相似文献
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Roy Privett 《Journal of The Franklin Institute》2002,339(3):257-263
The Franklin Institute, Philadelphia, Pennsylvania awarded the 2001 Bower Award and prize to Paul Baran for his efforts to advance our knowledge of physical science or its application for his seminal invention of packet switching—the foundation of modern communications networks and, in particular, the Internet.Simply stated the technology of packet-switching, allows pieces of information to be divided into small packets or “envelopes” of information that are addressed, sent using multiple available routes to a specific destination, then reassembled. This technology—a post office-like system—revolutionized the telecommunications industry. Originally devised during the cold war for a military communications system survivable in the event of nuclear attack, packet switching became the foundation of computer networks including the Internet and truly has altered the world in which we live. 相似文献
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Sharon Eisner Gillett 《The Information Society》2000,16(2):147-149
The current universal service policies for the Internet focus almost entirely on physical connectivity. This emphasis is misplaced because the Internet is an overlay network that rides piggyback on the existing telecommunications infrastructure. The focus instead should be on Internet services and the end-user equipment and training needed to access them. 相似文献
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目前全国文化信息资源共享工程已在衢州全市范围内建成2 802个基层站点,衢州市基层站点的服务模式有2种,卫星接收模式、宽带PC模式。现利用"远程教育"基层点的资源,采用宽带PC模式,在电信机房建立"衢州市文化信息资源共享工程镜像站",在全市范围以限定本地区外部IP地址来访问站点,确保"共享工程"资源的版权保护。至2008年底,共投入资金297万元,建立本地特色资源10GB,全市基层点共有专兼职工作人员5 392人,市支中心与远程办合作培训10 160人次,利用基层点开展服务163 522人次。通过"共享工程"与"远程教育"的衔接,建成了全市范围的"共享工程"服务网络,极大的推动了衢州市文化共享工程建设的深入发展。实现了市支中心和各基层点的广泛合作,资源共享,优势互补。衔接工程开始于2002年,至今取得了一定的成效,同时也存在一些问题。这将是一个长期的,需要持续的建设与不断完善的工程。 相似文献
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接入网技术在铁路通信网中的应用 总被引：1，自引：0，他引：1
铁路列车向高速化与准高速化方向的迈进,对通信业务和服务提出了新的要求,必须采用先进的、现代化的有线和无线通信的接入方式,实现铁路通信网的升级。介绍了接入网的组网框图、接入方式、发展现状及接入网在铁路通信中的重要性和发展趋势。 相似文献
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基于IEEE802．16的WiMAX技术以其独具优势的高速接入能力成为了业界追捧的宠儿。在移动通信领域,它能够提供高速的无线宽带连接,为用户提供数据接入、视频通信和语音通讯等业务。介绍了WiMAX的技术特点和制约因素以反应用和发展前景,并提出了发挥其优势的一些建议。 相似文献
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物联网是一个基于互联网和传统电信网等信息承载体,让所有能够被独立寻址的普通物理对象实现互联互通的网络。近年来备受学术界和产业界关注,众多高校也开始尝试开设物联网相关的课程以培养合格的专业人才。本文结合教学实践和科研工作中的体会探讨物联网专业的课程体系规划。 相似文献