移动通信系统"单通"故障浅析

本文分析了移动通信系统中，无线及交换系统内语音单通故障的成因；并以朗讯CDMA交换系统为例，提出语音系统优化建设；最后结合运维工作，阐述单通故障的处理流程与几种有效处理思想及工具。     

移动通信系统"单通"故障浅析

重点分析了移动通信系统中无线及交换系统内语音单通故障的成因,并以朗讯CDMA交换系统为例,提出语音系统优化建议;最后结合运维工作,阐述了单通故障的处理流程与几种有效处理思路及工具。     

移动通讯系统单通问题及处理

文中首先介绍移动通信系统语音单通故障的概念;然后从无线、交换系统分别阐述语音单通故障产生的原因,并结合中兴CDMA系统进行分析;最后结合运维工作,阐述单通故障处理流程与几种有效处理思路、工具.     

通信系统与通信网、网络管理

0617597移动通信系统“单通”故障浅析〔刊,中〕/曹炎炎//中国电子科学研究院学报.—2006,1(1).—66-69(G)重点分析了移动通信系统中无线及交换系统内语音单通故障的成因,并以朗讯CDMA交换系统为例,提出语音系统优化建议;最后结合运维工作,阐述了单通故障的处理流程与几种有效处理思路及工具。参40617598TDDCDMA系统无线资源管理算法的建模与仿真〔刊,中〕/堵久辉//中国电子科学研究院学报.—2006,1(1).—44-49,43(G)无线资源管理是第三代移动通信系统中的重要组成部分,用于对业务需求、资源分配、系统容量和稳定性进行控制,而TDD C…     

ZXPCS系统单通分析与处理

本文从ZXPCS系统架构出发,分层次对造成单通现象的可能原因和环节进行了分析,并且应用ZXPCS信令跟踪和语音电路定位功能,介绍了定位及处理单通问题的主要手段和方法,并提供了单通问题处理实例.     

浅谈GSM系统的单通问题

移动通信中的单通现象是指通话的双方只有一方可以听到对方的声音。产生单通的具体原因复杂多样，可能是用户手机本身的问题或是基站侧的设备问题，也可能是移动交换中心与基站控制器间的A接口电路存在问题、传输连线有交叉、交换软硬件设备故障或对端局有问题等。以下主要分三个方面对单通问题进行说明：产生单通的原因及处理方法、快速定位单通故障段落、单通问题的进一步落实和深入。     

WCDMA网络高清语音单通故障的分析方法研究

在WCDMA网络全网开通高清语音功能后,发现华为端局下的用户和爱立信端局下的用户进行高清语音通话时出现单通现象,通过测试、抓包等手段进行分析和定位,最终成功解决高清语音通话时的单通问题,有效保障业务质量,为解决高清语音的单通故障提供新的分析方法.     

基于话单分析的单通辅助诊断系统的设计与实现

语音单通故障是通信系统中常见的故障之一,它的出现严重影响了整个网络的运行质量,并直接影响用户满意度指标,而且此类故障较难定位,传统排查方法需要大量的时间、人力、物力和财力.本文通过对交换机话单的大量统计分析,设计了一个单通诊断模型,并实现了一个基于Microsoft.NET框架的单通辅助诊断平台.本平台能快捷准确地定位单通中继或小区,大大减少了公司的直接和间接损失.     

TD-SCDMA网络单通故障的实时监测方法

本文提出了一种能快速、实时地监测TD现网单通现象的方法,通过采用专用的硬件,实现高效的语音解码和语音特征值提取,并结合神经网络算法,快速、准确地判断出单通,为现网故障排查和网络优化提供及时的数据支持。     

软交换单通问题的处理方法

文章结合软交换网络和维护的具体实践,从软交换一起单通案例入手,对引起呼叫单通问题的因素及处理方法进行分析。阐述了故障处理思路与处理流程。文章主要依据软交换的SS+MSG7200+MSAG5200组网结构来介绍。具体讲述了以故障处理思路为指导去分析故障、解决故障的方法。     

基于DSP和小波变换故障诊断检测的研究

讨论了交-交变频调速系统故障诊断的重要性,在当前的检测方法研究的基础上,提出了基于DSP和小波分析的变频调速系统故障检测方法,建立了故障诊断系统;充分利用了DSP强大的数据处理功能,以及小波分析所具有的对非平稳信号的分析处理能力;实验证明该方法适用于变频调速系统的故障诊断。     

An Architecture of Scalable ATM Switching System and Its Call Processing Capacity Estimation

In this paper, we define the general requirements of ATM switching systems such as scalability, distributed fashion, and modularity. Also we propose a practical implementation of a scalable ATM switching system whose capacity can be easily expanded. Firstly, the architecture of the system is discussed with an emphasis on system scalability, modularity of subsystems and the simple control network of the design requirements. Secondly, we suggest the three types of distributed call/connection control schemes that are suitable for our switching system. We also estimate their call processing capacity on the average and make a comparison of them under the various system architectures. Since our scalable switching system can be constructed to perform the call processing functions on the various levels of the system capacity, it has much adaptability at the various evolution phases or regions of the network environment.     

IP组播在集群软交换中的应用

集群系统组呼要求交换机具备大的汇接交换容量,因此提出了组呼汇接交换的几种方案并进行了分析比较。其中,IP软交换和IP组播技术应用改善了大容量汇接交换的话音质量,降低了成本,提高了网络带宽利用率,是下一代集群系统交换技术发展的必然趋势。同时也论述了利用IP组播实现集群组呼交换需要的协议和对IP网络条件的要求。     

Designing a CORBA-based high performance open programmablesignaling system for ATM switching platforms

ATM switching platforms are well suited for transporting multimedia streams with quality-of-service (QOS) requirements. This paper describes the system design of a high performance connection management system for xbind, a flexible open programmable signaling system for ATM switching platforms. The latency and throughput of call processing is improved by caching, message aggregation, and processing of requests in parallel. Using a set of general purpose UNIX work stations, we are able to attain a maximum throughput of close to 600000 call operations/h (setup and delete) with an average call setup time of 85 ms. With a low traffic load of 3600 call operations/h, an average call setup latency of 11 ms can be obtained. The system is adaptive. By adjusting various control parameters, the connection manager(s) can be dynamically configured to trade off between throughput and call setup time     

Maintenance strategies for PCM circuit switching

During all the system design phase of an SPC switching system, a considerable effort is devoted to maintenance, both from a hardware and software point of view. The maintenance phases include fault detection, fault analysis (e.g., identification of the faulty security block within the switching system), fault isolation, fault reporting, fault localization, fault clearance, and restoration to service with the eventual requalification and reinitialization of the repaired security block. The paper mainly discusses fault detection and fault analysis strategies with specific reference to PCM digital switching systems. Different means leading to fault detection are presented with reference to central control, network access devices (scanners, drivers, markers), and digital switching network (duplicated or not duplicated). These means include automatic on-line tests (monitoring and routining), on-demand on-line tests, and alarm handling. Fault analysis can be accomplished by means of a deductive or a statistical method. As the latter seems more attractive, three basic methods of statistical fault analysis are presented. They use, respectively, two counters (operation and fault counter) per security block; one fault counter per security block; one "historical" fault stack, in which all the identities of security blocks involved in faulty operations are stored. The above fault analysis strategies are compared mainly in terms of core memory occupancy, processor time, and software complexity.     

Processor call carrying capacity estimation for stored program control switching systems

The call processing capacity of a stored program control switching system central processor is defined as the maximum number of calls which can be processed in some fixed interval of time while the processor is meeting all service criteria. The capacity of the processor is seen as a component capacity and thus assumes all other switching machine engineered items are adequately provided so that the processor can reach its maximum capacity. This paper discusses a scheme to categorize the various types of work performed by the processor. Using this scheme, various scheduling strategies are discussed, and their implications in the face of traffic are analyzed. The framework is then used to discuss call capacity estimation for stored program control system processors using examples of certain Bell System electronic switching systems. Practical problems related to the use of these call processing capacity estimation methods are discussed.     

Managing run-time interactions between call-processing features[intelligent networks]

Network service providers continue to require new and different call processing features for their switching systems. Open call processing addresses the limitations of the current feature procurement process by being vendor-independent; i.e. the same call processing model is used for all switching systems and it is required that features be independently installable on a running system. A structure for call processing software that supports open call processing is described. Different approaches to managing call processing features are discussed. The implementation of a simulation model of a feature manager that ties 17 interacting features together into a single feature package is presented     

A New Electronic Telephone Accounting System for Local Telephone Calls

Telephone switching systems provide facilities to measure subscriber usage for billing purposes. As new telephone services are offered, additional equipment is often required to appropriately measure this usage. Rate plans are being considered by telephone companies to more appropriately reflect service rendered on local telephone calls and additional equipment is required. This paper describes an electronic local message accounting system to measure local call usage which can be appliquéd to Panel, No. 1 crossbar, No. 5 crossbar, and Step-by-Step switching entities. Magnetic tape records for each local call provide: directory number of the calling party, distance to the called party, duration, and time of call termination. This information allows subscriber billing based on many and varied criteria which are established by software at the revenue accounting office. The system is presently in widespread use. The first installation occurred in January 1972, and now almost 5 percent of all telephones in the United States are served by the system.