TD-SCDMA网络Iu-PS接口协议关联方案的设计与实现

为了对TD-SCDMA 网络的用户流量进行识别以及对用户行为进行分析,对Iu-PS 接口的信令面与业务面协议进行了研究,设计出一种信令面和业务面协议关联的方案。针对传统信令监测系统和业务监测系统数据处理效率的不足以及无法将信令面与业务面数据进行关联的缺陷,利用增强型散列算法以及超时处理技术,设计出一种基于关键字段关联的信令面呼叫详细记录（call detail record,CDR）和业务面呼叫详细记录合成的协议关联方案,提高了数据处理效率,并实现了信令面和业务面数据的有效关联,为后期进行流量识别以及对用户行为进行分析奠定了基础。经过现网数据测试,验证了该协议关联方案的正确性与可行性,在移动互联网流量分析领域具有推广意义。     

网元性能及业务数据特征精准分析方法

传统的网络性能分析以及业务数据分析,都是通过网管KPI 确定的,网络指标出现异常则需要根据优化人员经验进行问题定位。对问题定位的效率取决于技术人员的水平,同时网络业务数据特征的分析粒度也很粗,不能精细化、全面化、多样化地分析用户特征。随着统一DPI系统的引入,展示了用户会话过程中涉及的最细粒度的业务状态以及网络信道质量。为了更加准确地反映小区网络质量和用户真实业务体验,所研究的网元性能及业务数据分析方法采用数据切片和关联的方式,更加精细化地将体现网络质量的控制面信令XDR（X data recording,呼叫数据记录的扩展）数据和用户面业务XDR数据关联在一起分析。实现分应用、分业务拓展的用户感知分析,明确质差用户或场景等情况下XDR的数据特征,从而提升网络优化效率、提高用户感知。     

基于DPI的LTE网络用户行为感知系统的设计与实现

针对电信运营商越发迫切的智能管道需求,提出了一种具有自学习功能的移动互联网用户行为感知系统的解决方案。本方案针对传统监测系统用户感知度低、统计能力不足等缺点,对现行LTE网络S1接口用户面协议进行分析,并结合当前互联网主流的行为分析技术——深度分组检测(DPI)技术和聚类爬虫技术的优势,实现了以协议解码、业务呼叫/事务详细记录(xDR)合成为基础的LTE网络用户行为精准分析。本系统经现网数据验证,能达到既定目标,对满足智能管道的需求具有一定的指导价值。     

移动运营商信令监测系统的应用研究

1引言 信令监测系统是通信网络运行维护的重要支撑系统之一。信令监测系统以不影响网络运行的高阻跨接、端口镜像、能量分配等方式采集各类信令和协议数据，进行信令协议解码，合成CDR（Call Detail Record，呼叫详细记录），再现业务接续全过程，进行网络和业务各类指标统计，从而使网络维护人员掌握并分析网络和业务运行情况。信令监测系统在互联互通监测、故障诊断、新业务测试、非法通信追踪、话单核查等方面具有独特优势。信令监测系统的建成满足了互联互通相关的各项需求，为网络质量保障提供了支撑。     

一种基于网络指纹分析的流量计费准确性检测系统

随着移动互联网技术的铺开以及产品的日益丰富,为解决流量计费方面用户的投诉申告或争议,文章提出了一种基于网络指纹分析的流量计费准确性检测系统,其部署计费检测仪通过调用RTD仿真拨测终端模拟用户上网行为,获取用户上网过程中的详细信令交互数据,对信令数据进行深入的协议解析和分析,对AAA话单和终端侧流量统计结果进行核对校验,对用户上网流量组成进行分析,从而准确识别用户流量,并在此基础上搭建准确性检测系统,从而达到验证传统流量计费准确性的目的。     

HTTPs加密流量识别方法研究

HTTPs加密流量识别主要采用HTTPs域名回填方案,对不能解析出HTTPs业务的域名的记录,通过DNS消息中返回的IP地址和HTTPs消息请求的目标IP进行关联,从而回填HTTPs消息的域名。通过这种方式,展开机器学习对HTTPs加密的用户面流量的识别研究,进一步识别出业务类型以及关键字段,提供页面浏览及视频业务的性能指标分析、用户行为分析所需字段信息。将机器学习在HTTPS识别中应用,突破识别技术难题,增强了DPI业务识别能力,提升了业务优化能力。     

LTE-Advanced网络Uu接口多协议关联方案的研究与实现

针对LTE-Advanced网络移动数据业务爆炸性增长、多协议关联分析处理效率低下等问题,在传统信令监测系统的基础上,提出了一种采用大数据技术(存储、处理和分析)和多协议关联分析技术的LTE-Advanced网络Uu接口多协议关联分析系统.首先,对Uu接口的L1、L2、L3数据业务流程进行高效处理和精准分析,然后进一步关联分析用户数据信令流程和用户业务数据流程.最后,将所提系统应用于LTE-Advanced网络Uu接口数据的现网测试中.测试结果表明:设计的多协议关联分析系统达到了预期的效果,对提升用户体验、高效进行大数据分析以及精准营销领域具有推广意义.     

LTE-Advanced网络流量监测和分析技术的研究与实现

实现LTE-Advanced（LTE-A）网络的流量监测和分析具有重要的意义。本文应用深度包检测技术（DPI）和DFI技术对应用层业务进行精细化识别,并设计了基于传输流的业务呼叫/事务详细记录（x DR）合成方法,实现了对业务流量的精确监测以及统计分析。     

IP承载网中RTP话音质量监测方案的研究

基于RTP话音质量监测是在OSS-GSM/WCDMA网络实时监测系统基础上,提出的一种话音质量监测方案。该方案介绍了话音业务协议的结构,并在实现各协议的详细解码、概要解码基础上,重点利用哈希算法研究了基于H.248和RTP的多协议关联,通过协议间的互查实现了RTP CDR(呼叫详细记录)的合成。结合线网数据测试表明,该方法准确,效果良好。     

江苏移动利用信令监测系统实现回拨业务分析

对网间互联互通中存在的回拨卡和回拨呼叫发生原理和业务特征进行了深入分析,详细说明了信令监测系统对于回拨呼叫行为的分析和统计。该分析有助于移动运营商有针对性拦截处理,减少异常欺诈业务对移动用户呼叫的影响。也对信令监测系统的深入分析应用有促进作用。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first