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通过应用GPON技术,简化了学生宿舍网络的双绞线布线规模,实现了学生宿舍2.5G带宽与校园网络的连接。本文在研究GPON技术原理及其组网方式基础上,结合学生宿舍实际,设计了基于GPON的接入方案。对园区及高校密集的网络应用,具有一定的参考价值。 相似文献
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在三网融合的业务接入构架中,可以考虑上网业务保留PPPoE的接入方式,其它业务采用IPoE方式的混合接入模式。顾名思义,PPPoE就是在以太网上跑的PPP协议。PPPoE将PPP协议应用到了以太网方式的宽带接入上,对整个交互过程并没有改变。但是PPPoE继承了通过用户名/密码进行网络接入的传统方式,并保持了后台业务开通以及RADIUS认证/计费的过程基本不变。 相似文献
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<正>引言随着现代科技快速发展,网络信息体系不断完善,信息安全对日常生活影响越来越大。在校园学习和生活中,师生与网络之间的联系更加紧密。在教育教学工作中,随着计算机网络技术在优化教育教学工作、提高教学管理效率和教学质量的应用,校园网络安全及信息安全问题愈发突出。提高校园网络安全维护效果成为计算机信息安全技术中的重点问题。 相似文献
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本文主要从GPON技术标准的形成、GPON与EPON技术比较、GPON系统的结构、GPON的技术特点、GPON的协议栈、GPON技术的应用、下一代GPON与EPON技术要点等方面,就GPON光纤接入网技术与应用进行一些探讨与分析。 相似文献
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用户接入技术演进 随着接入用户数量的增多,每用户带宽需求不断增长,ADSL/ADSL2+/FTTH/GPON等高带宽接入方式应运而生,极大提高了用户网络使用体验,每用户带宽控制的PPPoE设备逐渐演变为电信运营商主要的接入方式。 相似文献
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社会经济的持续健康增长,现代科学技术的不断创新和进步,现代通讯事业取得了良好的发展成果.运用在现代通讯工作中的技术在不断的更新当中,人们对于通信网络技术的需求也在逐渐提升.将GPON技术在通信网络建设过程中,有效顺应了当前的社会潮流趋势.本文主要是从GPON技术的内涵、GPON技术的特征和优势以及GPON技术的组成内容和应用类型方面入手,针对GPON技术的基本情况进行全面细致的分析和说明,同时还针对于GPON技术在通信网络建设中的实践作了详细的介绍. 相似文献
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The author observes that the social fabric of engineering, the support infrastructure of the profession, and the political and economic systems of the world are undergoing shifts that affect what engineering is, how it is accomplished, and what it should do. He asks what these changes mean in terms of the educational system and explores a few of these issues that lie between academia and the industrial environment beyond. He discusses the engineering curriculum as seen from industry, the role of continuing education, research in academia 相似文献
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"电路原理"与"信号与系统"课程的整合与优化 总被引:4,自引:2,他引:2
科学技术迅速发展,新兴学料不断增加,知识总量不断增长,迫使本科教育不断向着基础化方向发展,基础课程教学在本科教育中的地位愈来愈高。计算机技术的广泛应用,离散信号与系统的基础知识已是电气类各专业的必要的教学内容。因此基础课程要从根本上整体优化课程结构。本文提出了电气类专业“电路原理”与“信号与系统”课程教学改革方案,将两门课程教学内容进行整合与优化,并在实际教学过程中进行了教学试验,缩短了教学时间,提高了教学质量。 相似文献
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箔条和箔片的性能特性及其应用和趋势 总被引:6,自引:0,他引:6
从箔条和箔片用于干扰雷达测和扰乱、迷惑、转移或者引诱进攻出发,详细论述箔条、箔条云及箔片、箔片云的雷达散射截面、带度、平移速度、下降速度及转动等情况,空间和时间我、水平和垂直极化性能、多普勒频移效应以及频谱展宽特性等,通过箔条和箔片有效成火控雷达实例,提出对抗火控雷达的三个重要因素及其采取的对策。 相似文献
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目前所谓的全光网络一般指基于DWDM传送技术的光传送网络(OTN)。由于OTN的节点采用OADM和OXC技术,为解决目前点到点的DWDM技术在应用中不能实现灵活组网和当网络失效时不能有效进行保护的问题提供了一种解决方法,使得OTN具有传输容量大、组网灵活、网络具有可扩展性和可重构性、易于升级等特点,可透明传输具有代码格式的不同速率等级的用户数字信号,能够同时适应用户信号种类用服务种类不断增长的需求。 相似文献
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Davis R.F. Kelner G. Shur M. Palmour J.W. Edmond J.A. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1991,79(5):677-701
The deposition of silicon carbide thin films and the associated technologies of impurity incorporation, etching, surface chemistry, and electrical contacts for fabrication of solid-state devices capable of operation at temperatures to 925 K are addressed. The results of several research programs in the United States, Japan and the Soviet Union, and the remaining challenges related to the development of silicon carbide for microelectronics are presented and discussed. It is concluded that the combination of α-SiC on α-SiC appears especially viable for device fabrication. In addition, considerable progress in the understanding of the surface science, ohmic and Schottky contacts, and dry etching have recently been made. The combination of these advances has allowed continual improvement in Schottky diode p-n junction, MESFET, MOSFET, HBT, and LED devices 相似文献
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《Communications Magazine, IEEE》2008,46(9):52-56
Over the last 40 years in the semiconductor industry, one of the most reliable truths has been that "thepath forward is through integration." Moore's law and its various derivatives and cousins have illustrated how greater integration has provided tremendous benefits in cost, power, size, and performance. While shrinking process lithography has been a critical enabler of this trend, we should remember that tremendous innovation in device technology, circuits, system architecture, computer aided design (CAD), packaging, and many other areas have been necessary as well. The exponential integration phenomenon has not been limited to memory and microprocessors: mixed signal and radio functions have also seen striking advances in integration over the last 20 years, from cell phones to wireless LANs, integrated "systemon-a-chip" (SOC) transceivers have become prevalent in the circuits conferences, journals, and - in some applications - have even made it into commercial mainstream products. 相似文献
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在日本电视广播的发展过程中,电视信号技术、电视节目转播技术、发射机技术以及天线技术等发挥了不可替代的作用。这些技术在长达60多年的模拟电视广播中被大量的开发、使用,尤其是射频相关技术为日后地面数字电视广播的发展提供了重要参考。主要介绍了日本电视广播中该相关技术的发展,并进行了讨论。 相似文献
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Cellular architecture partitioning can improve the performance of telecommunications systems. The model proposed by the author allows for changing the cell size for different services and the number of users. The cell size that will ensure the best possible performance and quality of service can be derived by the model. The main task of a telecommunication system is call processing. This includes identifying incoming calls, establishing a communication path for the duration of the connection, and disconnecting the call after the conversation has ended. Call processing uses different components of the software architecture and involves processes and messages performing different functions and accessing various resources. In addition, the system requires administration and maintenance that also involves processes using different resources 相似文献