关于GSM网络位置区规划的研究

位置区是处于空闲模式下的移动台可以被网络寻址到的最小区域。位置区的规划对GSM网络容量寻呼性能、接通性能都有重要的影响。合理划分位置区的大小与边界位置是保证寻呼成功率与网络接通率指标的重要环节。本文对影响位置区寻呼容量的几个主要因素进行了研究和分析．对位置区的寻呼容量和话务容量进行估算．结合影响位置区划分的诸多实际因素．提出了对位置区规划的一些观点和看法。     

低轨卫星网络中位置寻呼方法

在LE0卫星通信网络中,为了将呼叫传递到移动用户,必需知道用户当前的位置,即移动用户定位,包括位置更新和位置寻呼两个过程。由于LEO卫星覆盖区随时间变化迅速,造成传统位置寻呼方法的信令代价和寻呼时延性能不能满足系统要求。该文针对LEO网络的运动特点,提出了顺序概率位置寻呼(PP:Sequential Paging Based User’s Probability)方法,开通过仿真对SP和其它已有寻呼方法在寻呼时延和寻呼信令代价方面做了比较。     

基于用户感知的WCDMA网络位置更新优化

本文从提升用户感知的角度出发,通过开展WCDMA网络位置更新优化,减少用户位置更新次数,达到延长手机待机时间、减少网络空口信令负荷、提高网络接通率的目的.     

移动GSM网络寻呼成功率参数优化

移动通信的网络质量越来越受到关注,运营商对网络性能指标的稳定性要求越来越高,尤其是涉及到用户感知的指标,例如寻呼成功率、接通率、掉话率等,都提出了很高的要求。文章对影响用户感知的重要指标寻呼成功率进行了分析。从分析影响GSM网络寻呼成功率的原因人手,找到寻呼成功率的参数优化方法。通过无线寻呼参数的优化,使寻呼成功率明显提高,达到预期的目的,提高用户感知。     

CDMA网络寻呼策略优化探讨

通过对移动用户和网络特性的分析,结合核心网和无线侧,研究了CDMA网络的寻呼类型,给出语音和短信寻呼的基本方法,LAC(location area code,位置区码)位置区设置和周期性位置更新的重要策略,并对网络寻呼与某些业务的触发先后次序、关键定时器之间的冲突以及寻呼与移动终端的配合等问题进行了研究,提出了能够提高系统接通率和改善用户感知的寻呼策略方法:增加二次或三次寻呼、LAC边界避开话务密集地区、同一LAC下的周期性位置更新参数设为一致、周期性位置更新定时器无线侧设为小于网络侧等。     

移动网络寻呼成功率的分析与提高

寻呼成功率是评价一个移动网络优劣的重要指标之一,也是目前中国三大运营商KPI考评指标体系的重要组成部分。寻呼成功率的高低直接影响着手机做被叫的接通率,同时也影响着用户的感知。笔者通过在交换侧对寻呼的流程进行分析,寻找改善寻呼成功率的各方面因素,从而解决移动通信寻呼成功率低的问题,以便提高移动通信质量、进而提高用户满意度。     

浅析移动长途来话接通率早晚差异及优化对策

提高网络质量、保持用户的忠诚度、争取更高的用户份额是移动运营商目前面临的重要课题，而长途来话接通率是对GSM网络的科学衡量。本通过信令分析仪对长途来话接通率差异较大的交换机进行信令跟踪。分析了移动通信网长途来话接通率早晚存在的差异和原因，并提出了减少差异、提高长途来话接通率的优化对策。     

提高长途来话接通率方法探讨

简要介绍了影响网络接通率的因素，对通过信令流程优化长途来话接通率的原理进行了阐述。     

TMSI寻呼与选择性鉴权的使用

为了防止非法个人或团体通过监听无线路径上的信令交换而窃得移动用户真实的用户识别码（IMSI,International Mobi1e Subscriber Identification Number）或跟踪移动用户的位置,现在大多数交换机都开启了临时识别码（TMSI,Temporary Mobi1e Subscriber Identny）寻呼。而为了降低网络信令负荷,交换机可以将鉴权功能有选择性的打开。当TMSI寻呼和选择性鉴权同时打开时,有可能会造成用户的使用问题。这里主要讨论了TMSI寻呼和选择性鉴权的基本原理,并且根据在现网维护中遇到的用户投诉和河南部分交换机的设置分析二者同时打开时对网络的影响。     

关于提高网络性能寻呼响应成功率的探讨

寻呼响应成功率是一项衡量网络性能,直接影响长途来话接通率的重要指标.本文结合实际网络的优化经验,针对影响寻呼向应成功率的无线、有线网络的诸多因素,进行了较为全面的分析,并提出相应的解决办法.     

基于GSM—R的铁路通信网络设计

GSM-R（GSM For Railway）是为铁路通信设计的综合专用数字移动通信系统,采用GSM-R理论。完成兰州至格尔木段的通信网数字移动通信系统设计,能够双网络覆盖整个线路,有效解决GSM-R网络中常出现的问题诸如信道拥塞率高、呼叫成功率低等。     

TD-SCDMA／GSM融合组网共LAC研究

本文提出TD—SCDMA／GSM共LAC组网方案,缩短终端进行系统间重选的时延,改善用户“呼叫不可达”时延。并且通过优化配置,提升TD—SCDMA系统寻呼能力,以保障共LAC方案的可行性。实测结果表明,在乒乓重选的极端场景下,寻呼成功率从40％提升到100％,基本消除“呼叫不可达”现象。并且,TD系统的寻呼能力达到250TMSI／s,消除了寻呼瓶颈。     

影响2G/3G切换成功率因素的分析与探讨

本文分别从网络优化和设计规划的角度,对影响切换成功率的各因素进行了较为全面的分类阐述,总结出了2G/3G共建中关于提升切换成功率的关键技术和策略。     

Optimal deployment of femtocells using cost function

In fact, the demand for mobile data has turned out to be one of the most pressing needs of the human race. In more details, the researcher deals with the voice calling performance and good network signal, which are needed to achieve the above. The femtocells are mostly designed for indoor environments. It enables voice calling and traffic loading, where it improves network coverage. Thus, a femtocell is deployed for signal improvement in the indoor setting. Interference occurs among femtocells. The optimisation of femtocells depends on system factors that require performance and capacity of the network for indoor users. In the above circumstance, the authors considered using the cost function to optimise the mobile coverage, whereby reducing the interference within the users. Adequate MATLAB simulation was utilised for this study. The simulated results were satisfactory since they illustrate the benefits of the methods for the service performance.     

广西CDMA网PPP指标优化浅析

分析了影响CDMA网分组域指标PPP连接成功率的各种因素，并对广西CDMA网的PPP连接失败的实例进行了分析，提出了提高广西PPP连接成功率的方法，实施后取得了显著效果。     

Advanced services architectures for Internet telephony: a criticaloverview

Advanced services are differentiating factors and crucial to service providers' survival and success. Examples are credit card calling, call forwarding, and toll-free calling. In classical telephony's early days their implementation was embedded in switching software, and this hindered fast deployment. A more modern architecture known as the intelligent network (IN) was born in the 1980s, allowing implementation in separate nodes, resulting in faster deployment of new services. Two tracks are emerging for Internet telephony: one from the ITU-T and the other from the IETF. As far as advanced services are concerned, the ITU-T track offers a rather archaic architecture, reminiscent of the early days of classical telephony. On the other hand, the IETF architecture, although more modern, does have a few pitfalls. There is plenty of room for improvement to both. This article scrutinizes the ITU-T and IETF advanced services architectures for Internet telephony. Salient features are reviewed and weaknesses pinpointed. Although these architectures are constantly evolving, alternatives may emerge. We provide a discussion of two potential alternatives: IN-based architectures and mobile-agent-based architectures     

Biased choice of a mobile telephony tariff type:: Exploring usage boundary perceptions as a cognitive cause in choosing between a use-based or a flat rate plan

Most mobile network operators provide newly acquired or existing customers with the possibility to choose between a monthly flat rate for unlimited voice calls and pay-per-minute price schemes. Consumers who maximize their utility should select the tariff type that leads to the lowest invoice amount given their anticipated service usage volume. However, previous research looking at users of fixed network telephony, broadband Internet access and other services suggests that a significant share of consumers prefers a flat rate to use-dependent price plans even though their invoice will be higher. One cognitive explanation for such biased choices is that consumers consider the ratio of the likelihood of calling enough to justify a flat rate to the probability of not calling enough to save money with a fixed price (= “ratio rule”) when choosing between the two tariff types. In this assessment they overestimate the first likelihood in proportion to the second one. Drawing on a sample of 203 mobile telephony customers in Germany the present study shows that mobile users are biased in favor of a flat rate because they overestimate their future call usage and behave in line with the “ratio rule” when choosing a tariff type. Correlates of cognitively biased tariff choices are explored. With regard to pricing practices it is concluded that managers should not follow the temptation to exploit the overestimation bias in designing pricing and advertising policies pushing customers into fixed price schemes, which do not fit their actual calling patterns.     

基于SIP协议的呼叫转移功能实现

随着VoIP网络的普及,大型集团公司开始使用VoIP交换机接入到VoIP语音公众网中,公司会为业务繁忙的员工配备内部终端。但如果员工外出,当客户对该终端进行呼叫时,公司希望VoIP交换机能够及时地将呼叫转移到业务员的移动终端上,文中通过设计各种情况下的呼叫时序,实现了基于SIP协议的呼叫转移功能。     

一种特殊的软交换局间低切换成功率故障分析

描述了一种特殊的软交换局间切换低成功率故障现象,分析了不同无线系统间切换的基本步骤和信令流程,以及影响切换成功率的主要因素,认为影响切换成功率的关键因素是无线网络规划及设备的参数设置。为了提高无线系统间的切换成功率,网络运营者尤其应适时关注源侧的无线网络规划和系统参数的调整。