RNC接入移动承载网方案分析

一、引言随着无线网络优化工作的日益推进,移动网络PS域需要新增RNC设备。新增的RNC接入移动承载网的CE设备实现与SGSN的通信。某地移动承载网根据规划,新增RNC与原网RNC需要共用同一组信令面vlan、同一段信令面的IP地址,但由于二者型号不同,对CE设备的数据配置要求不同,甚至有冲突的地方,所以针对新增RNC入网需要制定详细的CE数据配置方案,保证原网RNC业务不受影响,新增RNC也能正常入网运行。     

WCDMA及无线网络控制器负荷分析与研究

随着3G业务的快速发展,WCDMA网络的负荷也在逐渐增加。文中针对WCDMA和无线网络控制器的信令处理及其配置的软硬件处理能力无法满足网络需求和不平衡问题,结合某联通公司的RNC数据统计对其负荷进行分析,并最终对WCDMA网络无线RNC的扩容提出了建议,且在该公司试用后取得了良好的效果。     

智能终端对WCDMA核心网分组域网络影响的探讨

文章分析了智能终端引起信令剧增的原因,探讨了快速增长的信令对现有分组域网的影响,并从现有网元扩容和引入新技术两方面提出了解决方法。     

烽火通信信息

烽火通信完成广州联通PTN现网综测：日前,烽火通信对外宣布,已率先完成广州联通HSPA＋承载测试和PTN现网综合业务测试,测试结果验证了PTN可以对现网的2G、3G、固网等多业务,以及HSPA＋、LTE等提供完美承载     

WCDMA核心网QoS参数的研究

从3G业务QoS入手,对影响用户感知的Traffic class、THP、ARP等3项关键参数进行了重点研究,并结合现网进行了实际测试和信令跟踪。从信令消息中得到RAB指配消息中QoS参数的实际取值,进一步由RNC利用相关参数进行资源分配和调度控制,最终实现不同用户的不同服务保障。     

基于GPEH的网络分析与研究

GPEH记录了RNC和Node—B内部处理器产生的信息，例如容量管理以及信道转换等；同时记录了和RNC接口相关的所有信令，如RANAP、RNSAP、NBAP、RRC信令等；并且能够记录某些特定的智能事件，如掉话、拥塞发生时的所有信息以及系统资源利用的情况等。通过GPEH数据分析，网优工作人员能够快速的再现、定位和解决问题。     

台达 协助机房完美扩容 斩获上海百万大单

台达Ultron DPS系列UPS助广州联通750机房完美扩容 近期,台达产品再传喜讯,顺利入驻广州联通750机房UPS系统扩容项目。     

无线网络控制器TP卡自动重启问题分析及解决

RNC,即无线网络控制器,是3G网络的一个关键网元,负责移动性管理、呼叫处理、链路管理和移交机制。通过IP/MPLS Network即IPBH7750实现RNC在EVDO网络中拓扑互联。向下,通过IPBH7750的IPbackhaul网络承载RNC的业务处理模块(即TP)与无线基站的数据流、RNC的应用处理模块(即AP)与基站的信令流;向上,经过IPBH7750接入CN2网络,承载RNC的TP与PDSN的信令和数据流。本文依据EVDO网络拓扑、RNC设备在网络中的位置、RNC与PDSN间RP接口的信令等知识,展示了某省发生的一次大规模TP板卡自动重启的故障进行分析及处理过程,为后期维护提供参考。     

关于手机短信长度的探讨

讲述了手机短信最多70个字的由来,通过专业软件跟踪超长短信的实际信令流程,验证了目前现网中依然采用最初的短信标准,对3GPP协议进行分析,探讨了未来短信字数扩容的可行性。     

联通打造“金牌网络”

今年,河南联通将斥资30亿元进行全省G网的升级扩容,其中郑州地区是这次升级的重点。日前,河南联通郑州分公司副总经理谢敬国向媒体披露：2008年,郑州联通将投资10亿元进行G网扩容,全年新增基站1700座,全市城区、乡镇实现99％网络覆盖。目前已新建成的4套软交换端局、2套软交换汇接局及3套寄存器。交换容量和处理能力比去年提高近一倍多,有效地匹配了目前的基站建设。“无论是覆盖状况还是网络容量,     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks