PHS网络掉话率分析与优化思路

在PHS网优优化的项目中,掉话的优化是其中综合性较强、复杂度较高的一项工作,也是是一项长期而且重要的网络优化工作．因此要做好掉话的优化工作,必须对PHS网络的知识有深入的理解．并在实践中积累相关的优化思路和技巧。本文针对目前发展迅速的PHS业务所带来的网优负担,提出与掉话优化相关的分析要点与优化思路。     

浅析PHS掉话率网优的"标、本、药"

掉话率是衡量PHS网络质量的一项重要指标,降低掉话率是日常网优工作的难点。本文详细分析了引起掉话的各种原因,对如何治理掉话问题全面进行了探讨。     

PHS存在的典型问题及网优建议

PHS 业务已经进入了成熟期,然而在网络与业务大发展的同时也暴露出了一些问题,如易掉话、来话接通率不高等等。针对这些典型问题,运营商应该如何优化网络、调整策略呢?     

PHS本地网掉话问题分析及探讨

在小灵通网络的使用中,掉话是一种在极大程度上影响用户对小灵通感受的现象,因此如何改善PHS网络掉话意义重大。本文首先介绍了掉话率的定义及特点,并在此基础上探讨影响掉话的原因及相应的处理方法。     

PHS网络掉话问题解析

随着移动市场激烈竞争和3G(第三代移动通信系统)即将正式投入市场运营,电信面临着PHS网络的完善和后期PHS网络维护,如何管理和维护好各个网络是一个比较重要的课题,本文就如何提高PHS网络的一个重要指标—掉话率进行了论述,着重从PHS网络的覆盖、同步、干扰、切换等方面来分析掉话的原因及解决办法。     

PHS网络掉话问题解析

随着移动市场激烈竞争和3G(第三代移动通信系统)即将正式投入市场运营,电信面临着PHS网络的完善和后期PHS网络维护,如何管理和维护好各个网络是一个比较重要的课题。本文就如何提高PHS网络的一个重要指标——掉话率进行了论述,着重从PHS网络的覆盖、同步、干扰、切换等方面来分析掉话的原因及解决办法。     

解决掉话问题的思路与方法

联系日常网络优化工作的实际,详细阐述和分析了掉话的类型及掉话的原因,提出了解决掉话问题的思路与方法.     

GSM掉话原因及提高掉话比的措施

首先深入分析了 GSM系统中产生掉话的各种原因,随后根据近期无锡移动通信公司开展的话务掉话比专项网络优化工作的体会,介绍了提高网络话务掉话比的一些基本方法和经验.     

PHS网络运行指标在优化工作中的意义

云南电信从2002年10月份开始进行全省性的PHS网络优化工作,通过一年的实践,在PHS网络维护和优化工作方面取得了明显的效果,同时也积累了一些经验。在此,将我省在PHS网络优化工作中的经验做一个介绍,以供从事PHS网络优化和维护的同仁参考。1网络规模云南省共有12个本地网建设了PHS网络,分别采用了UT和中兴公司的PHS系统进行独立组网。目前,通过五期的工程建设,无线网络容量接近200万线,在网用户数超过100万。2网络优化工作情况简介我省在2002年10月份成立了PHS网络优化项目组,开始推进全省的PHS网络优化工作。在开始工作之初,由于…     

PHS网络掉话率的回归分析方法与处理研究

掉话率是一项衡量PHS网络质量的重要指标,掉话产生原因涉及到诸多环节,各个环节出问题都可能引起掉话的产生。将回归分析的方法理论应用于无线话务数据分析中,为处理掉话率问题提供了一条新的思路。     

TD-SCDMA系统干扰分析与定位研究

通过分析富士康工业园E座3扇区高掉话原因,梳理了TD-SCDMA系统干扰分析和处理流程,给出了干扰区域的后续网络优化思路,最后从排查小灵通干扰、TD系统内的干扰、设备自身干扰等方面对干扰问题的排查方法进行了总结。     

On the resource efficiency of virtual concatenation in SDH/SONET mesh transport networks bearing protected scheduled connections

Virtual concatenation (VCAT) is a Synchronous Digital Hierarchy (SDH)/Synchronous Optical Network (SONET) network functionality recently standardized by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T). VCAT provides the flexibility required to efficiently allocate network resources to Ethernet, Fiber Channel (FC), Enterprise System Connection (ESCON), and other important data traffic signals. In this article, we assess the resources' gain provided by VCAT with respect to contiguous concatenation (CCAT) in SDH/SONET mesh transport networks bearing protected scheduled connection demands (SCDs). As explained later, an SCD is a connection demand for which the set-up and tear-down dates are known in advance. We define mathematical models to quantify the add/drop and transmission resources required to instantiate a set of protected SCDs in VCAT- and CCAT-capable networks. Quantification of transmission resources requires a routing and slot assignment (RSA) problem to be solved. We formulate the RSA problem in VCAT- and CCAT-capable networks as two different combinatorial optimization problems: RSA in VCAT-capable networks (RSAv) and RSA in CCAT-capable networks (RSAc), respectively. Protection of the SCDs is considered in the formulations using a shared backup path protection (SBPP) technique. We propose a simulated annealing (SA)-based meta-heuristic algorithm to compute approximate solutions to these problems (i.e., solutions whose cost approximates the cost of the optimal ones). The gain in transmission resources and the cost structure of add/drop resources making VCAT-capable networks more economical are analyzed for different traffic scenarios.     

PHS系统网络优化

网络优化对PHS系统至关重要,由于技术体制不同,PHS系统的网络优化相对于G、C网来说有其自身的特点.本文根据PHS系统自身特点,详细分析了其网络优化的一般流程,优化手段.     

煤矿井下小灵通无线通讯系统优化

介绍了煤矿井下小灵通无线通讯系统网络结构和空中接口原理。针对小灵通在煤矿井下使用中存在掉话、切换等问题,结合公网小灵通系统优化经验,提出适合煤矿井下环境的优化方法,这些优化方法从根芩上解决了影响现场使用效果的问题,可综合运用于煤矿井下小灵通系统优化过程。     

基于软交换的网络智能化方案

电信固网运营商的网优网改、无线市话（PHS）网络与公共交换电话网（PSTN）等网络的融合、通信网络宽带化和多媒体化、PSTN网络与第3代移动通信（3G）网络融合等催生了固网网络智能化的需求。通过软交换技术来满足这一需求是切实可行的方法。基于软交换的网络智能化解决方案丰富了通信业务，促进了固网和移动网的融合，是极具优势的网络智能化方案。     

High-Quality and High-Speed Wireless Multimedia Transmission Technology for Personal Handy Phone System

The Personal Handy-phone System (PHS), developed as a PCS, has been very widely accepted. This system offers many benefits as the infrastructure of the mobile data communication services that are expected to be available soon with the popularity of nomadic computing. Data communication systems based on PHS and some applications are proposed in this paper. One of the key technologies, an error control scheme, is also introduced. Three kinds of possible system configurations are discussed as a data communication platform for PHS. One of them has an ARQ function which corrects all errors that occur in the propagation path. Conventional application software on nomadic computers can be used in the mobile environment because this ARQ function is installed as a lower layer protocol. The introduced system connects all mobile computers to all servers that are on the networks which include ISDN, the conventional analog PSTN, cellular networks and PHS networks.     

PHS网络优化与信令分析

网络优化是无线市话(PHS)网络系统实际运营过程中的重要环节.本文简单介绍了PHS网络优化的基本思想,通话测试中的信令分析.最后对测试中遇到的常见问题进行讨论,并提出解决方案.     

Investigation de la gestion de qualité de service dans le réseau UMTS

Bit rate announced for the future standards of telecommunication, as well as the level of integration reached are, as many factors, determining for the establishment of new applications in mobile terminals. Nowadays, mobile video streaming services are possible. Mobile users expect to receive multimedia traffic with some performance guarantees, so we must ensure the necessary quality of service during the video transmission. This paper aims at investigating quality of service issue inUmts network. More specifically, we explore the main challenge of quality of service management to dynamically optimize the distribution of load inUmts networks. Our investigation is organized in the following way. We formalize the optimization problem which is based on the graph theory and modellingUmts network as well as mobile users and applications to be used. The simulation of our optimization model show a clear improvement of the quality of service perceived by anUmts user in terms of bit rate, blocking and connection drop.     

Actual call connection time characterization for wireless mobile networks under a general channel allocation scheme

Actual call connection time (ACCT) is the total time that a mobile user engages in communications over a wireless network during a call connection. Due to limited network resources of wireless mobile networks, a call connection may be prematurely disconnected and the ACCT for the call in general may not be the same as the requested call connection time (RCCT). The ACCT depends not only on the RCCT, but also on the network resource allocation scheme and network traffic. We characterize the ACCT and related performance metrics for wireless mobile networks under a newly proposed general channel allocation scheme. This scheme generalizes the nonprioritized scheme, the reserved channel scheme, the queueing priority scheme and the subrating scheme in such a way as to reduce the blocking probability of the handoff calls while keeping the ACCT as long as possible. Explicit formulae for the distribution and the expectation of the ACCT are obtained. The call completion probability, the call drop probability, and the average actual call connection times for both the complete calls and the incomplete calls are derived. The results can form the basis for designing better billing rate schemes by differentiating incomplete calls and complete calls.     

光传送网的生存技术

 生存技术作为光传送网体系演进中最为重要的组成部件,受到学术界和工业界广泛而持久的关注.论文回顾和总结光传送网生存技术的重要研究成果及若干最新进展,内容包括:光网络的连接恢复技术、可生存光网络的资源优化与服务质量、两层网络的连接恢复技术以及透明光网络的故障定位技术.