ATM网中VPN业务的设计与实现

本文分析了ＡＴＭ网中基于ＶＰ和基于ＶＣ两种层次的ＶＰＮ业务的特点,提出了ＶＰ子层的ＶＰＮ业务的设计,并讨论了一种基于ＴＭＮ和ＣＯＲＢＡ的ＶＰＮ管理系统的实现方案。     

邮电业务总量的预测研究

首先建立了邮电业务总量的回归预测,灰色预测和组合预测数学模型,分析研究了各模型对邮电业务总量的预测。结果表明,组合预测具有较高的预测精度,是一种切实可行的方法。     

应急通信保障体系建设的一些思考

近年来,我国自然灾害频发,灾害本身及次生灾害所带来的影响面非常广、国民经济和人民生命财产安全受到严重威胁,尤其是5．12汶川大地震,是对我国社会公共安全体系及社会公共保障能力的一次重大考验。国家应急通信保障作为国家专项应急保障的重要组成部分,在抗灾抢险、物资调运、灾情实时发布等方面起到了至关重要的作用。因此强化和完善通信网络应急保障体系,是当前乃至将来很长一段时间内的迫切要求。     

形式化语言在UMTS开发中的应用

由于3G协议规范的复杂性，3GPP方法论指导方针中鼓励使用标准的形式化语言来进行UMTS产品的设计、开发与测试。文中概要性地描述了UMTS的体系结构和在规范描述中用到的一些形式化语言的基本概念和特点，探讨了这些形式化语言在UMTS开发中的应用。使用形式化语言开发UMTS可以简化和改进测试程序，实现新产品与新标准的同步推出。     

Using heuristic algorithms for capacity leasing and task allocation issues in telecommunication networks under fuzzy quality of service constraints

Nowadays, every firm uses telecommunication networks in different amounts and ways in order to complete their daily operations. In this article, we investigate an optimisation problem that a firm faces when acquiring network capacity from a market in which there exist several network providers offering different pricing and quality of service (QoS) schemes. The QoS level guaranteed by network providers and the minimum quality level of service, which is needed for accomplishing the operations are denoted as fuzzy numbers in order to handle the non-deterministic nature of the telecommunication network environment. Interestingly, the mathematical formulation of the aforementioned problem leads to the special case of a well-known two-dimensional bin packing problem, which is famous for its computational complexity. We propose two different heuristic solution procedures that have the capability of solving the resulting nonlinear mixed integer programming model with fuzzy constraints. In conclusion, the efficiency of each algorithm is tested in several test instances to demonstrate the applicability of the methodology.     

Uncertain Classification of Fault-Prone Software Modules

Many development organizations try to minimize faults in software as a means for improving customer satisfaction. Assuring high software quality often entails time-consuming and costly development processes. A software quality model based on software metrics can be used to guide enhancement efforts by predicting which modules are fault-prone. This paper presents statistical techniques to determine which predictions by a classification tree should be considered uncertain. We conducted a case study of a large legacy telecommunications system. One release was the basis for the training dataset, and the subsequent release was the basis for the evaluation dataset. We built a classification tree using the TREEDISC algorithm, which is based on ² tests of contingency tables. The model predicted whether a module was likely to have faults discovered by customers, or not, based on software product, process, and execution metrics. We simulated practical use of the model by classifying the modules in the evaluation dataset. The model achieved useful accuracy, in spite of the very small proportion of fault-prone modules in the system. We assessed whether the classes assigned to the leaves were appropriate by statistical tests, and found sizable subsets of modules with uncertain classification. Discovering which modules have uncertain classifications allows sophisticated enhancement strategies to resolve uncertainties. Moreover, TREEDISC is especially well suited to identifying uncertain classifications.     

电信欺诈行为的聚类研究

针对海量电信数据的聚类问题,利用粗集中的知识简化方法,减少属性的数量,提取主要的特征属性,并结合性能优良的模糊Kohonen聚类网络,提出了一种新的电信欺诈行为的检测模型,采用Microsoft SQL2005和VC＋＋6.0技术,利用电信运营商提供的真实数据对该模型进行验证,实验结果表明,基于粗集神经网络方法提出的模型快速有效且具有较高的准确率。     

多功能载波通讯电能表的研制

设计了一款通过电力线进行载波通讯的多功能电能表。该表具有对电压、电流有效值、有功能量、无功能量、视在能量等进行较高精度计量的功能,并采用电力线载波通讯方式,实现了自动抄表功能。     

Topological planning and design of UMTS mobile networks: a survey

In this paper, we present a literature review on the topological planning problem of third generation (3G) cellular networks based on the universal mobile telecommunications system (UMTS) standard. After describing the UMTS architecture, we introduce each subproblem and present major works that have been done. The cell, the access and the core network planning problems have all been considered as well as a more global approach (when more than one subproblems are considered simultaneously). Both planning and expansion algorithms are also included in this review. The goal of this paper is to present and classify the different research works that have been done so that it can be used as a starting point for future research on topological design of UMTS networks. Copyright © 2008 John Wiley & Sons, Ltd.     

一种电信管理网故障管理子系统架构

电信网络管理的目标是要最大限度地利用电信网络资源,提高网络的运行质量和效率,向用户提供良好的通信服务.故障管理子系统在其中扮演着重要的角色,其系统结构和实现方式对于提高整个电信管理网的稳定性起着重要的作用.本文介绍了一种故障管理子系统的组成方式和实现机制,并体现出这种故障管理子系统的优势.