面向用户数据融合的演进之路——分布式HLR应用浅析

本文分析了分布式HLR建设方案的重点,给出应用建议,希冀推动该技术的广泛应用,帮助运营商稳步迈向融合的用户数据中心,助力业务的融合。     

HLR用户数据自动备份系统的实现

本文介绍了华为HLR用户数据自动备份的具体实现过程,利用Solaris和Windows的计划任务,通过FTP脚本方式将HLR用户数据在非忙时自动备份到本地终端和第三介质上,避开了忙时采用手工备份的弊端,提高了工作效率和设备安全。     

移动网络功能在HLR／AUC中的实现

文章讨论了ＨＬＲ／ＡＵＣ所支持的移动网络功能，并介绍了基于ＧＳＭ系统所开发的ＨＬＲ／ＡＵＣ子系统在这方面的实现设计。     

分布式HLR与传统HLR组网方案研讨

分布式HLR技术目前正在移动网络中逐步代替传统HLR。分别从功能架构、分布式HLR优点、接口与协议、网元冗余等几个方面剖析传统HLR与分布式HLR区别,从对比中学习分布式HLR的工作原理,加强对分布式HLR理解和认识。     

华为HLR N＋1容灾中心解决方案

HLR(Home Location Register，家区位置寄存器)作为移动网络中最重要的数据中心，保存着用户的签约数据和位置信息，网络地位非常重要。一旦HLR发生故障，将导致严重后果：对于用户而言，将造成所有用户不能作被叫、不能进行位置更新、不能取到鉴权信息、不能接收短消息、不能修改用户自定义的补充业务；对于运营商而言，网络无法运营、营业厅及客     

分布式HLR技术特点探讨

分布式HLR是继R4概念引入核心网络之后对于HLR的一次重要变革。本文简要阐述了分布式HLR基本组成及原理,并对其组网特点进行探讨。     

HLR容灾的建设及解决方案分析

介绍了HLR容灾的建设必要性、HLR容灾的多种解决方案、各种解决方案的影响及效果。     

未来移动网络架构需以用户数据为中心 传统集中式HLR向分布式HLR演进

在全业务运营竞争的新阶段,面向业务多样化和接入多样化的全业务需求,未来网络需要构建一个以用户数据为中心的网络架构,实现网络用户数据共享以支持多业务的融合。HLR(归属位置寄存器)是管理移动用户的数据中心。全业务背景下固定用户与移动用户数据进行数据融合的需求迫切,传统的集中式HLR已难于适     

关于利用HLR中用户数据协助挽留离网用户的研究

随着移动通信业务的快速发展,高速增长的移动通信用户趋于饱和,运营商利润从增量用户逐步转变为存量用户,如何避免存量用户离网成为各大运营商经营的难题。本研究针对该问题,分析归属位置寄存器(Home Location Register,HLR)中用户数据变化情况,与传统通过话单分析离网用户形成互补,更全面生动地描绘出离网用户,以支撑运营商开展存量用户经营和离网用户挽留工作。     

移动通信网HLR容灾

在移动通信系统中,随着设备集成度大幅度地提高,单一节点或网元突发重大事故所造成的影响面越来越大。HLR(归属位置寄存器)作为移动网络中最重要的数据中心,保存有用户的签约数据和位置信息,地位非常重要,是移动通信系统中最重要的数据库之一。随着移动通信网的快速发展,现网中HLR的容量越来越大,     

基于BOSS的HLR容灾方案

归属位置寄存器(HLR)在移动通信网络中具有重要的地位,本文从网络安全及提升服务角度出发,对基于业务运营支撑系统(BOSS)的容灾备份方式进行了分析、探讨,提出低成本的解决方案.     

Ethernet data plane evolution for provider networks [next-generation carrier ethernet transport technologies]

This article provides an overview of the evolution of the Ethernet data plane. In particular, it focuses on the emergence of features that have made Ethernet an attractive infrastructure technology option for carriers and network providers. These include the development of data plane maintenance protocols (OAM), and scaling enhancements, initially in the form of VLANs, then VLAN stacking (802.lad), and more recently complete recursion of headers (802.lah). The complete recursion of headers has led to the ability to decouple the infrastructure data plane from traditional bridging behavior while preserving other desirable attributes, leading to new approaches to operating Ethernet networks such as PBB-TE.     

Control architecture for next-generation communication networksbased on distributed databases

Intelligent routing control is defined as the process in which the network interrogates the databases containing the relationships between logical numbers, such as personal or information identifiers, and physical addresses in the transport network to find the terminal having the information required to process a user request. The routing control system presented uses distributed databases, each of which manages a switching system and all of which are connected through high-speed signalling networks separate from the transport network. If the requested physical address cannot be found in one database, search requests are distributed at the same time to all other databases. For up to 100 million subscribers, the routing control system can find a physical address within 1 s when each database uses ten memories accessed at 200 ns with an interdatabase linkage speed of 14 Mb/s     

Location management for next-generation personal communicationsnetworks

This article presents a survey on location management algorithms for next-generation personal communications networks. We first describe different static and dynamic location update algorithms. Then we discuss various selective paging strategies. We also present various modeling techniques that have been used for the performance analysis of location update and terminal paging. We conclude by stating a number of open problems that need to be addressed for the deployment of next-generation PCNs     

WLAN-GPRS integration for next-generation mobile data networks

The ongoing wireless LAN standardization and R&D activities worldwide, which target bit rates higher than 100 Mb/s, combined with the successful deployment of WLANs in numerous hotspots justify the fact that WLAN technology will play a key role in wireless data transmission. Cellular network operators have recognized this fact, and strive to exploit WLAN technology and integrate this technology into their cellular data networks. For this reason, there is currently a strong need for interworking mechanisms between WLANs and cellular data networks. We focus on these interworking mechanisms, which effectively combine WLANs and cellular data networks into integrated wireless data environments capable of ubiquitous data services and very high data rates in hotspot locations. We discuss the general aspects of integrated WLANs and cellular data networks, and we examine the generic interworking architectures that have been proposed in the technical literature. In addition, we review the current standardization activities in the area of WLAN-cellular data network integration. Moreover, we propose and explain two different interworking architectures, which feature different coupling mechanisms. Finally, we compare the proposed interworking architectures, and discuss their advantages and drawbacks.     

Virtual network resource management for next-generation networks

The multilayer structure of transport networks presents a key challenge in network resource management. In this article we present a virtual network approach to the management of transport network resources. We describe the approach as developed for the management of large-scale ATM networks and discuss the application to the next generation of multilayer transport networks.     

Dynamic spectrum management for next-generation DSL systems

The performance of DSL systems is severely constrained by crosstalk due to the electromagnetic coupling among the multiple twisted pairs making up a phone cable. In order to reduce performance loss arising from crosstalk, DSL systems are currently designed under the assumption of worst-case crosstalk scenarios leading to overly conservative DSL deployments. This article presents a new paradigm for DSL system design, which takes into account the multi-user aspects of the DSL transmission environment. Dynamic spectrum management (DSM) departs from the current design philosophy by enabling transceivers to autonomously and dynamically optimize their communication settings with respect to both the channel and the transmissions of neighboring systems. Along with this distributed optimization, when an additional degree of coordination becomes available for future DSL deployment, DSM will allow even greater improvement in DSL performance. Implementations are readily applicable without causing any performance degradation to the existing DSLs under static spectrum management. After providing an overview of the DSM concept, this article reviews two practical DSM methods: iterative water-filling, an autonomous distributed power control method enabling great improvement in performance, which can be implemented through software options in some existing ADSL and VDSL systems; and vectored-DMT, a coordinated transmission/reception technique achieving crosstalk-free communication for DSL systems, which brings within reach the dream of providing universal Internet access at speeds close to 100 Mb/s to 500 m on 1-2 lines and beyond 1 km on 2-4 lines. DSM-capable DSL thus enables the broadband age.     

Optimal memory management strategies for a mobile user in abroadcast data delivery system

Data broadcasting has been considered as a promising way of disseminating information to a massive number of users in a wireless communication environment. In a broadcast data delivery system, there is a server which is broadcasting data to a user community. Due to the lack of communication from the users to the server, the server cannot know what a user needs. In order to access a certain item, a user has to wait until the item appears in the broadcast. The waiting time will be considerably long if the server's broadcast schedule does not match the user's access needs. If a user has a local memory, it can alleviate its access latency by selectively prefetching the items from the broadcast and storing them in the memory. A good memory management strategy can substantially reduce the user's access latency, which is a major concern in a broadcast data delivery system. An optimal memory management policy is identified that minimizes the expected aggregate latency. We present optimal memory update strategies with limited look ahead as implementable approximations of the optimal policy. Some interesting special cases are given for which the limited look-ahead policies are optimal. We also show that the same formulation can be used to find the optimal memory management policy which minimizes the number of deadline misses when users generate information requests which have to be satisfied within some given deadlines     

A distributed database architecture for global roaming in next-generation mobile networks

The next-generation mobile network will support terminal mobility, personal mobility, and service provider portability, making global roaming seamless. A location-independent personal telecommunication number (PTN) scheme is conducive to implementing such a global mobile system. However, the nongeographic PTNs coupled with the anticipated large number of mobile users in future mobile networks may introduce very large centralized databases. This necessitates research into the design and performance of high-throughput database technologies used in mobile systems to ensure that future systems will be able to carry efficiently the anticipated loads. This paper proposes a scalable, robust, efficient location database architecture based on the location-independent PTNs. The proposed multitree database architecture consists of a number of database subsystems, each of which is a three-level tree structure and is connected to the others only through its root. By exploiting the localized nature of calling and mobility patterns, the proposed architecture effectively reduces the database loads as well as the signaling traffic incurred by the location registration and call delivery procedures. In addition, two memory-resident database indices, memory-resident direct file and T-tree, are proposed for the location databases to further improve their throughput. Analysis model and numerical results are presented to evaluate the efficiency of the proposed database architecture. Results have revealed that the proposed database architecture for location management can effectively support the anticipated high user density in the future mobile networks.     

下一代光数据网络的新模型

过去的十年里，光网络技术的两项突破已经成为了满足业务提供商对容量的日益增长的需求的关键因素。第一项是DWDM，它可以将一根光纤分解为多个通道从而提高了现有光纤的可用带宽。第二项是通过使用像波长路由器和交叉连接系统这样的设备实现了带宽的智能化管理，这些设备能够支持具有智能配置和恢复功能的日益动态化的网络。那么下一步是什么呢？目前摆在人们面前的主要有两个挑战。其一是在需求以超乎想象的速度增长的情况下，对以数据为核心的网络不断地进行扩充，从用户接入点到城域网乃至整个长途核心网。另一个挑战是有效地创建并管…