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随着LTE时代的到来,核心网分组域将向EPC网络演进,EPC网络将引入基于IP协议的Diameter信令,核心网将实现基于IP的全互联的网状网络。文章主要针对EPC网络中Diameter信令方式的寻址方式及特点进行分析,并为移动信令网引入DRA组网提供方案建议。 相似文献
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蔡宁 《电信工程技术与标准化》2015,(10)
CDN的出现,把流量推到网络的边缘,缓解主干网络的拥堵。当前CDN运营商的主要部署节点是在IDC机房,在通信运营商看来,IDC到最终用户还隔着CMNET,核心网与传送网。随着手机、平板等无线设备的普及,给核心网带宽压力越来越大。将CDN边缘节点下层到核心网中,对缓解核心网的网络压力,降低网络时延有着巨大的作用。本文对CDN边缘节点下沉的可行型及方案进行了分析,并特别针对当前研究比较少的CDN边缘计算节点进行了分析,由于缓存系统与CDN已渐成融合的趋势,本文将缓存系统的节点视为CDN边缘节点。 相似文献
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2011年,全球移动运营商在无线核心网关上的开支将超过10亿美元,其中LTE网络部署的增加是主要原因,而LTE网络的部署相应地也刺激了运营商在下一代分组核心网EPC(Evolved Packet Core)方面的开销。预计2012年移动运营商在无线核心网关上的开支将超过11亿美元,其@LTEEPC开销将达到5.88亿美元。 相似文献
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LTE无线网络QoS业务承载能力分析 总被引:1,自引:0,他引:1
基于Qo S部署的智能网络能力开放是目前移动互联网时代业界的研究重点,作为4G LTE网络的基础组成部分,EPC核心网主要负责智能网络的策略与控制,而对于策略的实际执行者,即LTE无线网的QoS业务承载能力的研究却一直没有得到充分的重视。本文首先给出现阶段LTE网络无线侧QoS部署场景及部署方案,然后基于LTE网络典型资源配置,分析研究LTE无线网络对Qo S业务的承载能力,包括GBR及Non-GBR业务承载能力等,最后对LTE无线网络部署QoS业务对于现有网络的影响进行一定分析,分析结论为未来LTE网络能力开放部署策略及部署方案决策提供参考。 相似文献
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NFV是未来网络的基础性技术,有助于实现软件化的基础通信网络,快速响应用户/市场需求,实现网络的快速部署、业务的快速更新和上线以及网络的灵活调度,而核心网虚拟化是NFV在移动核心网中的具体应用,IMS、EPC云化是业界研究热点,文章以此为背景,从网络建设和维护的角度,分析核心网虚拟化后全新的生命周期工程管理模式。 相似文献
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随着无线接入网的演进和移动互联网需求的增长,LTE的部署正在加速进行。这个发展趋势要求核心网与接入网同步发展,为了满足宽带发展的需求,要加快部署EPC网络。本文研究了EPC技术,并对EPC的解决方案作了阐述。 相似文献
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8位嵌入式CPU核的正向设计 总被引:4,自引:1,他引:3
介绍了一个与Motorola 68HC05指令兼容的8位CPU核的设计,分析了系统结构和工作原理以及设计构思,最后简要介绍了一个用VHDL语言实现的通用仿真验证软件. 相似文献
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Since the contact-less power transmission system accomplishes power transfer using magnetic coupling of the transformer without a mechanical contact, it has the advantages of electric isolation, safety, reliability, low maintenance and a long-product life. However, a contact-less transformer with a large air gap has a low coupling coefficient and high leakage inductance. This, in turn, results in poor power conversion efficiency. In this article, a contact-less power transmission system based on a rectangular type core and a series resonant converter is proposed to improve system efficiency and performance. The proposed system is designed with an air gap of 1 mm and 50 kHz switching frequency, but it is assumed that in a practical application, the air gap varies. It is verified by experimental results that the proposed contact-less power transmission system based on the rectangular type core and a series resonant converter can substantially reduce the circulating current and improve the system efficiency. Also, it is verified that even with an increased air gap, the proposed system maintains soft switching and avoids switching devices' current spikes while suppressing the increase of the circulating current caused by an air gap increase. 相似文献
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数字签名是在电子丈档上签名的技术,确保了电子文档的完整性.利用了XML数字签名的处理机制,对XML数据文档进行数字签名,给了具体数字签名的方案,实现了XML文档的签名传输. 相似文献
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WANG Wei-min~ SUN Hao~ XU Ru-wei~ .Shijiazhuang Post Telecommunication Technical College Shijiazhuang P.R. China .Hebei Normal University Shijiazhuang P.R. China 《中国邮电高校学报(英文版)》2004,11(Z1)
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… 相似文献
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On IEEE P1500's Standard for Embedded Core Test 总被引:4,自引:0,他引:4
Erik Jan Marinissen Rohit Kapur Maurice Lousberg Teresa McLaurin Mike Ricchetti Yervant Zorian 《Journal of Electronic Testing》2002,18(4-5):365-383
The increased usage of embedded pre-designed reusable cores necessitates a core-based test strategy, in which cores are tested as separate entities. IEEE P1500 Standard for Embedded Core Test (SECT) is a standard-under-development that aims at improving ease of reuse and facilitating interoperability with respect to the test of core-based system chips, especially if they contain cores from different sources. This paper briefly describes IEEE P1500, and illustrates through a simplified example its scalable wrapper architecture, its test information transfer model described in a standardized Core Test Language, and its two compliance levels. The standard is still under development, and this paper only reflects the view of six active participants of the standardization committee on its current status. 相似文献