5G数据库组网方案

为了实现4G/5G互操作,5G核心网的用户签约数据库UDM和策略数据库PCF必须分别与4G核心网的HSS和PCRF融合建设,基于5G的组网需求和2G/3G/4G的网络部署经验,梳理了几种可行的数据库组网方案,分析了5G网络的数据库组网需要从用户不换卡不换号的开通需求、数据库融合、4G数据迁移、网络路由等多个方面来考虑技术方案,从而保证4G用户升级为5G用户的业务体验。     

基于网络演进的用户数据库融合部署实现

随着EPC(分组核心演进)网络和IMS(IP多媒体子系统)网络的逐步部署,核心网将面临重大改造。随着4G时代的到来,移动用户将具备IMS、LTE及2G/3G的多用户属性,在业务接入和数据存储方面对用户数据库提出了新的要求。文章主要对传统2G/3G HLR(归属位置寄存器)、SAE HSS(系统结构演进归属用户服务器)、IMS HSS融合的必要性进行分析,探讨数据融合的优势及关键问题,结合中国移动的网络发展现状及网络演进趋势,探讨基于网络演进的用户数据库融合部署实现。     

移动核心网用户数据融合演进策略

随着网络和业务的发展,运营商将面临2G/3G、LTE、IMS等多个核心域共存的局面,从发展角度来看,用户数据管理朝着融合的方向发展,用户数据库技术向分布式、大容量的方向演进;从标准上来看,用户数据融合已成为发展趋势,本文主要研究移动用户数据库的发展趋势、数据库融合的策略,思考如何使LTE和IMS等网络建设更好的适应用户和业务的发展,分析研究在融合过程中的关键问题,提出移动网用户数据管理方面的发展策略。     

把握用户需求推动3G业务开展

分析了目前3G市场的环境和用户的需求，对我国发展3G业务提出了几点建议，诸如运营商应明确自身定位，正确处理与设备供应商之间的关系等。     

GPRS网络中的QoS问题解决方案

在移动通信迅猛发展的今天,如何保证用户的QoS需求,使移动网可以根据不同的业务特点提供满意的服务,越来越受到行业人士的关注.本文重点讨论了2.5G和3G的QoS体系并针对现网出现的QoS问题提出了相应的解决方案.同时,本文明确的提出在2.5G和3G网络中SGSN是处理QoS属性的关键网元,SGSN设备能够提供各种QOS的兼容性是网络提供高质量业务的重要保证.     

用户自动签约5G SA方案

5G SA网络商用部署后,如何尽可能无感知地引导用户签约并使用SA网络是运营商面临的一个难题.为解决此问题,首先分析了引导用户自动接入SA网络的两种主要思路,通过比较分析,提出基于数据库仿真的方案只是一种过渡方案的观点,随后本文重点探讨了基于数据库割接的SA自动签约方案,同时还对后续如何进一步优化提出了建设性意见.本文...     

LTE促使手机发生爆炸式进化

以LTE为代表的3.9G移动通信方式的出现,将帮助手机从传统束缚中解脱出来,手机的功能会在短时间内迅速增加。升级到更便宜、数据通信速度更快的3.9G,不仅能引起手机业的商业模式变革,也将打破用户与设备商对手机的传统观念。未来很有可能会陆续出现许多目前根本无法想像的设备,手机可能不再只是移动电话,而脱胎成为新的移动设备。     

面向数据用户实时控制的3G分组域建设策略探讨

目前GPRS网络运营中存在数据用户计费方式复杂,运营商对数据业务实时控制力度不够等问题。促使运营商在开展3G建设前,必须对分组域作出合理规划。文章从3G数据用户实时控制角度入手,分析了分组域核心网元设置原则,漫游用户归属地接入实现,内容计费架构实现等分组域建设策略,并针对性的提出了相应的设备改造方案。     

WCDMA分组域归属地接入实现方案探讨

从3G数据用户实时计费控制角度入手，分析了漫游用户归属地接入实现的各种方案，并针对性地提出了相应的设备改造方案。     

“非4G客户”不转4G网络的原因分析

本文通过整合中山市400万在网客户大数据资源,从用户分布、投诉热点、网络现状、用户流量等多维角度开展数据建模分析,并结合SQL数据库等大数据分析挖掘手段,基于网络投诉来分析非4G客户不转4G的痛点原因。从技术层面深度挖掘准4G用户在消费感知中遇到的问题,并以此快速定位需要针对性营销的目标用户,通过主动回访关怀或改善网络覆盖,从而提升用户感知,提升用户对移动4G网络的信心。实现市场网络一体化协同推广4G网络,促使非4G用户使用移动4G网络。     

China goes solo [3G mobile radio]

China wants to keep up with the west by building 3G mobile phone networks. And the west is just as keen because China is expected to be the largest single market for mobile phones. With a penetration of just 15% into its massive 1.3 billion population, it has already overtaken the US in subscriber numbers. So western companies that make the wireless equipment for 3G have been watching the Chinese. government's position on standards very closely. In the autumn of 2002 it had to decide which of three competing 3G standards to support. So it chose all three. But in a clear hint as to where the Chinese government sees investment going, it gave a largely home-grown standard the lion's share of the spectrum. Compared with the 60 MHz allocated each to wideband-CDMA (W-CDMA) and cdma2000, the 155 MHz reserved for the time-division synchronised (TD-SCDMA) version of 3G represents a big gamble on a protocol that is unfinished. This has made some infrastructure equipment builders wary of spending even more on 3G R&D. Aspects of TD-SCDMA in China are discussed.     

网间移动用户号码携带现场试验总体技术方案

对网间移动用户号码携带现场试验的总体技术方案进行了介绍,包括数据库的设置方式、查询数据库的方式、网间技术方案和可能涉及的网络和设备的改造等。     

cdma2000无线接入标准研究和中国3G应用的探讨

本文从频率分配、频道带宽和用户数据速率调整机制等诸多方面分析了cdma2000无线接入标准特征,认为cdma2000在三大主流国际标准中更胜一筹,建议我国的3G网络建设选择cdma2000及1x EV-DO标准.     

Evolutionary architecture for an all-services ATM access network

This paper presents a flexible concept for a broadband subscriber access network which minimizes investment costs by predominantly using the existing network infrastructure. The target network may consist of either a coaxial tree-and-branch structure or symmetrical copper pairs to the subscriber, and is connected to the central head station with the aid of optical feeder lines which can be implemented or enhanced by a passive optical network (PON). In the event of an increase in bit rate requirements, the coaxial network can be expanded by dividing it into smaller, optically fed subnetworks or by supplementing it with optical overlay systems. Flexibility, expandability and low costs are achieved through the standard ATM format implemented for the signals of all interactive services down to the network termination units on the subscriber side. Those signals are transmitted in the coaxial network in frequency bands above the CATV band in accordance with a multiple of the CATV channel width to ensure that the modulation and demodulation is implemented in a cost-efficient manner while providing ‘bit rate on demand’ for a suitably high number of subscribers. Separation of the network termination unit from the customer premises equipment enables a flexible, cost-efficient subscriber configuration to be selected, existing domestic wiring to be used and several completely different subscriber terminals to be simultaneously connected.     

The Optimal Sizing of HSS Database in IMS

Our paper deals with the architecture and standards of IP the multimedia subsystem from next generation networks point of view. It describes the structure of the home subscriber server database and then derives equations for sizing of its load in the proposed scenarios. We have used two methods for the database sizing—Erlang C formula and Markov chains. Finally, the achieved results and used methods are evaluated and discussed.

     

Automatic synthesis of equipment recipes from specified wafer-statetransitions

Run-to-run and supervisory control algorithms determine the equipment recipe to produce a desired output wafer state given the incoming wafer state and the current equipment model. For simple, low-dimensional equipment models, this problem is not difficult. However, when there are multiple responses for the system and the equipment models are nonlinear, automated synthesis of recipes is complicated by the potential for multiple solutions. While there are standard techniques for handling such inverse problems in general, each of these techniques is optimal only under certain conditions. We present a framework for performing automated synthesis of recipes that integrates database search, local optimization, and global optimization into a consistent methodology that is applicable to a wide range of equipment models and inversion problems in general. The integrated framework imposes quasi-continuity on the extracted recipes, is scalable to systems of high dimensionality, and can be optimized to minimize the expected synthesis time for any given problem. The framework has been implemented in a system that performs statistical optimization of CMOS transistor designs. The integrated framework provides a factor of 16 increase in performance over global optimization and a factor of three increase over exhaustive search and multiple starts of a local optimizer     

Rural Subscriber Physical Loops

This paper briefly traces the development of physical subscriber loop design in the Rural Electrification Administration (REA) Program from 1949 to the present. Development of equipment for overcoming in the most economical manner the signaling and transmission problems encountered with long subscriber loops is also discussed. This includes loading systems for wider bandwidth, better structural return loss, less bridging effects with multiparty lines; loop extenders in place of costly long-line adapters (LLA's); lower cost voice-frequency repeaters (VFR's) and switching methods such as Common-Mode Operation (CMO) where less equipment is required. Discussion of the problems still encountered with transmission and signaling on rural subscriber loop is presented with ideas for solution. Development of VFR equipment with automatic gain control for use in CMO or Common-Control Central offices would permit designing to common circuit net loss and minimize contrast between circuits. Extension of signaling limits of central office equipment (COE) now being developed could eliminate the need for external loop extension equipment on better than 90 percent of rural subscriber loops. Development of a telephone instrument requiring less dc line current would eliminate the need for elevated line voltages.     

5G通信基站分场景差异化备电创新方案研究

随着4G网络覆盖加深，5G商用范围不断扩大，5G基站设备的高功耗给5G建设中的备电需求带来巨大挑战，同时运营商对5G备电与传统通信设备备电有不同的需求，因此低成本，高效率的差异化备电是目前急需解决的问题。本文研究提出一种满足运营商不同制式的智能差异化备电方案，在减少开关电源设备投资的同时，可提供5G设备供电情况精准监控、5G设备电费精准统计、5G设备灵活控制等功能。