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冯传奋 《电信工程技术与标准化》2009,22(12)
本文针对MSC Pool中出现的负荷不均衡现象,提出了一种简单的基于负荷的动态反馈控制技术。仿真结果及相关分析显示此种反馈技术在理论和实际应用中均可行。 相似文献
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本文针对MSC Pool技术在河南移动实际组网中和容灾场景中遇到的自动容灾和被叫恢复问题,进行了深入的分析并提出了有效的解决方案,将3GPP协议中的VLR Restore流程引入到MSC Pool容灾场景,利用SCCP层备份寻址实现HLR路由数据的自动倒换。多次模拟实验证明,该方案能够自动,零时间内实现核心网网元级设备容灾场景下的一次被叫恢复难题。并且,本方案属于零投资、采用开放的协议和规范、不局限设备厂家和软件版本,为MSC Pool技术在河南移动的大规模应用铺平了道路,确保了区域经济的平稳、健康发展。 相似文献
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MSC Pool组网规划研究及问题分析 总被引:2,自引:0,他引:2
简要介绍了MSC Pool的技术原理,对目前MSC Pool技术应用存在的问题进行了分析,并针对引入MSC Pool带来的影响进行了探讨,重点讨论了 MSC Pool组网的要点和原则.并给出了MSC Pool组网规划的相关建议. 相似文献
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宋亚丽 《电信工程技术与标准化》2013,(11):23-26
本文针对MSC Pool技术在移动网络中大规模应用后产生的跨局呼叫量剧增导致的呼叫时延增加和语音编解码次数增多的问题,进行了深入的分析并提出了有效的解决方案,利用自主发明的技术专利"一种定向迁移的方法"建立了一套定向迁移系统,该系统可以将跨局呼叫变为局内呼叫,从而从根源上解决MSC Pool技术带来的天然缺陷。 相似文献
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引入MSC Pool技术后网络管理面临的问题分析及解决方案 总被引:1,自引:0,他引:1
《山东通信技术》2008,(4)
本文介绍了MSC Pool的引入背景和技术特点,对MSC Pool引入后带来的网络管理方式变化进行了分析,并针对MSC Pool不同于现有网络管理方式的特点提出了解决方案。 相似文献
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Bhupendra K. Sharma Bongkyun Jang Jeong Eun Lee Sang‐Hoon Bae Tae Woong Kim Hak‐Joo Lee Jae‐Hyun Kim Jong‐Hyun Ahn 《Advanced functional materials》2013,23(16):2024-2032
A stretchable and transparent In‐Ga‐Zn‐O (IGZO) thin film transistors with high electrical performance and scalability is demonstrated. A load‐controlled roll transfer method is realized for fully automated and scalable transfer of the IGZO TFTs from a rigid substrate to a nonconventional elastomeric substrate. The IGZO TFTs exhibit high electrical performance under stretching and cyclic tests, demonstrating the potentiality of the load‐controlled roll transfer in stretchable electronics. The mechanics of the load‐controlled roll transfer is investigated and simulated, and it is shown that the strain level experienced by the active layers of the device can be controlled to well below their maximum fracture level during transfer. 相似文献
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关于最大功率传输问题的讨论 总被引:2,自引:1,他引:1
在正弦稳态电路的分析中,很多教材均讨论了最大功率传输问题。所讨论的问题一般都是针对已知的含独立源的线性网络,通过改变负载来讨论获得最大功率的条件。但在实际问题中,有时会遇到电源和负载不可变,而需设计匹配网络的问题。一般教材中没有给出这种情况下的最大功率传输条件的证明。本文讨论了当电源及内阻抗和负载阻抗不变时,通过设计一无损的LC网络实现最大功率传输,并给出了这种情况下负载获得最大功率条件的证明。 相似文献
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本文论述了双端接阻容负载RC二端口网络转移电压函数的极点与RC阻抗和导纳乘积的零,极点位置分布关系定理.导出了双端接载与等效单端接载网络转移电压函数之间关系的数学模型,利用一次归并和两次分解途径给出了双端接任意阻容负载网络的实现方法. 相似文献
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颜秋容 《电气电子教学学报》2011,33(3):40-44
最大功率传输是信号传输中必须考虑的问题。正弦稳态电路中,在负载阻抗不可调节时,可以通过在电源(或含源线性一端口网络)与固定负载之间级联无源无耗二端口网络来变换负载阻抗,实现负载从正弦稳态电源(或含源线性一端口网络)获得最大功率。本文研究此类无源无耗二端口网络的最简单结构、参数关系及其适用范围。推导可以实现最大功率传输的... 相似文献
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Method for Adjusting Single Matching Network for High‐Power Transfer Efficiency of Wireless Power Transfer System 下载免费PDF全文
A wireless power transfer (WPT) system is generally designed with the optimum source and load impedance in order to achieve the maximum power transfer efficiency (PTE) at a specific coupling coefficient. Empirically or intuitively, however, it is well known that a high PTE can be attained by adjusting either the source or load impedance. In this paper, we estimate the maximum achievable PTE of WPT systems with the given load impedance, and propose the condition of source impedance for the maximum PTE. This condition can be reciprocally applied to the load impedance of a WPT system with the given source impedance. First, we review the transducer power gain of a two‐port network as the PTE of the WPT system. Next, we derive two candidate conditions, the critical coupling and the optimum conditions, from the transducer power gain. Finally, we compare the two conditions carefully, and the results therefore indicate that the optimum condition is more suitable for a highly efficient WPT system with a given load impedance. 相似文献
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为计算地下工程全年的热湿负荷,在基于热湿传递原理的基础上,选取长沙作为研究对象,利用FLUENT软件分别进行数值模拟,计算地下工程内部热湿负荷。 相似文献
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The standard current loop is modified for a boost converter to eliminate sensitivity of the control-to-output transfer function to the nature, and magnitude of resistive load. An additional term directly proportional to the load current and output voltage, and inversely proportional to the input voltage is added to the current loop. This results in practically invariant loop gains for different resistive loads, including constant power load 相似文献
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A new expression for the coupled interconnect system transfer function has been derived under general linear generator and uncoupled load conditions, i.e., without any restrictions in circuit load impedance. High-speed-signals on coupled interconnects have been simulated using this transfer function. The simulation uses generalized interconnect circuit model parameters in which all line parameters are frequency dependent. The validity of the interconnect circuit parameters was confirmed previously using s-parameter measurements. High-speed signal simulation using this novel interconnect transfer function has been verified with time-domain measurements using an HP54121T high-speed sampling oscilloscope. This work accurately predicts coupled interconnect circuit responses. With this transfer function, signal integrity problems of high-performance VLSI circuits can be predicted in the design stage 相似文献
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在三相四线制供电系统中,当单相有功负载跨接两个单相电源时,就会在两个单相电源内部分别引起多余的感性无功负载和容性无功负载。对此,本文利用简单、直观的相量图及等效原理分析有功负载引起无功功率转移的原因。论述了两种虚拟无功负载存在的机理。 相似文献