CDMA2000网络A1接口BSAP协议监测技术的研究与应用

以CDMA2000网络A1接口BSAP(base station application part)协议监测关键技术研究与应用为切入点,以如何实现对CDMA2000网络进行实时、高效、可靠监测为研究重点。针对国内外现有网络协议监测技术协议解码、CDR合成研究方案时效性的不足,从协议解码算法流程设计、CDR(call data record)合成算法原理及算法效率(时间复杂度)来进行对比验证分析,并以此为突破口,设计了BSAP协议监测模块的实现方案。研究成果将可对同网络其他协议及接口监测方案提供参考,其研究和实现的内容可应用于网络监测系统、监测仪表中,能为现网的监测、运营商的运维提供可靠技术支撑。     

CDMA2000网络A1接口BSAP协议监测技术的研究与应用

以CDMA2000网络A1接口BSAP(base station application part)协议监测关键技术研究与应用为切入点.以如何实现对CDMA2000网络进行实时、高效、可靠监测为研究重点.针对国内外现有网络协议监测技术协议解码、CDR合成研究方案时效性的不足,从协议解码算法流程设计、CDR(call data record)合成算法原理及算法效率(时间复杂度)来进行对比验证分析,并以此为突破口,设计了BSAP协议监测模块的实现方案.研究成果将可对同网络其他协议及接口监测方案提供参考,其研究和实现的内容可应用于网络监测系统、监测仪表中,能为现网的监测、运营商的运维提供可靠技术支撑.     

GSM用户感知系统中BTSM协议监测方案研究

BTSM协议监测是全球移动通信系统(global sgstem for mobile communication,GSM)用户在感知系统的基础上,以网络用户感知系统为研究平台,提出了一种Abis口BTSM协议监测方案.介绍了用户感知系统及Abis协议栈结构,在此基础上重点研究BTSM协议解码方案及呼叫详细记录(call detail record,CDR)合成技术,利用方法封装、哈希算法等方法以代码实现了BTSM协议的详细解码、简单解码和CDR流程合成等功能.结合现网数据,将该方案应用于用户感知系统进行测试验证.测试结果表明,结果准确,效果良好.     

LTE网络S1接口流量监测技术的研究与实现

为了实现对长期演进(long term evolution,LTE)网络的流量监测,对S1接口用户面协议栈和应用层协议进行了分析,利用模块化设计思想实现了对S1接口应用层协议的全面监测。针对传统信令监测系统数据业务识别度低、统计能力不强的问题,在传统的监测系统基础上,应用深度包检测（deep packet inspection,DPI）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(call/transaction detail record,xDR)合成方法,实现了对业务流量的精确监测。经现网测试验证,所设计的基于深度包检测技术的业务识别方案和基于传输流的呼叫/事务详细记录合成方案达到了预期的效果,在移动通信网络业务流量监测领域具有推广意义。     

WCDMA网络Iub接口AAL2链路猜测算法

为解决现有技术配置Iub接口AAL2链路参数存在的业务中断、灵活性、扩展性较差等问题,提出一种Iub接口AAL2链路参数猜测算法。该猜测算法对每一数据帧按照FP,MAC和RLC的顺序分别对各个层的数据单元PDU进行预猜测并遍历RACH,FACH和PCH3种信道,将成功率数值最大的预配置参数判定为猜测成功的参数并将其写入配置文件。实测结果表明,采用该算法的程序模块,能够在WCDMA网络Iub接口准确、完整地监测和分析信令消息,对Iub接口信令监测和协议分析具有重要意义。     

WCDMA网络Iub接口AAL2链路猜测算法

为解决现有技术配置Iub接口AAL2链路参数存在的业务中断、灵活性、扩展性较差等问题,提出一种Iub接口AAL2链路参数猜测算法。该猜测算法对每一数据帧按照FP,MAC和RLC的顺序分别对各个层的数据单元PDU进行预猜测并遍历RACH,FACH和PCH 3种信道,将成功率数值最大的预配置参数判定为猜测成功的参数并将其写入配置文件。实测结果表明,采用该算法的程序模块,能够在WCDMA网络Iub接口准确、完整地监测和分析信令消息,对Iub接口信令监测和协议分析具有重要意义。     

基于信令监测的网络弱覆盖侦测方案

本文提出一种基于GSM系统A接口和E接口信令监测、用于侦测重点区域网络弱覆盖情况的应用方案。基于信令监测的网络弱覆盖区域侦测平台方案通过全面、细致分析信令消息，可以获得较为深入、准确的网络覆盖质量信息，有助于建立主动发现、准确定位、深入分析、跟踪评估的网络弱覆盖区域解决机制，提升网络质量，节约生产运营和人力资源的成本。     

GSM移动信令网中移动应用部分（MAP）的监测

介绍了GSM移动信令网中移动应用部分(MAP)的监测问题，主要讨论了MAP分层结构，MAP信令协议分析及移动业务分析。针对MAP的分层格式，着重介绍了其由事务处理能力层(TCAP)向MAP层的解码过程，给出了流程图，并结合实例分析了解码结果。在建立在底层解码的基础上的移动分析中，给出了包括呼叫建立号码，统计及呼叫故障统计的实现过程实测情况。MAP信令监测系统的实现对更好地维护管理GSM信令网，优化GSM网络提高网络的运行质量都是不可缺少的。实测结果对MAP信令检测系统的实现有一定的参考价值。     

TD-SCDMA网络测试仪中Uu接口的信令分析

深入研究了在TD-SCDMA系统中对Uu接口协议栈进行信令监测的方法。给出了NodeB节点的用户平面和Uu接口控制平面的结构模型和公共传输信道传输格式的确定方式,分析了Uu接口协议栈RLC协议的分段重组过程。在此基础上提出了从Iub接口FP协议数据帧中得到Uu接口协议栈数据,实现信令监测的一种算法。该算法的程序模块在实际环境下进行了测试,结果说明,运用该算法能够在Iub接口准确地、完整地监测和分析Uu接口的信令消息。     

GSM移动信令网中移动应用部分(MAP)的监测

介绍了GSM移动信令网中移动应用部分(MAP)的监测问题,主要讨论了MAP分层结构,MAP信令协议分析及移动业务分析。针对MAP的分层格式，着重介绍了其由事务处理能力层（TCAP）向MAP层的解码过程,给出了流程图,并结合实例分析了解码结果。在建立在底层解码的基础上的移动分析中,给出了包括呼叫建立号码,统计及呼叫故障统计的实现过程实测情况.MAP信令监测系统的实现对更好地维护管理GSM信令网,优化GSM网络提高网络的运行质量都是不可缺少的.实测结果对MAP信令检测系统的实现有一定的参考价值。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to