移动核心网转型以适应未来3G、IMS格局的几点分析

随着3G的日益临近，如何改造目前的2G移动核心网，使其既能支持现有的2G网络，又能适应未来3G网络的发展，已成为当今移动核心网络规划、建设必须考虑的问题之一。为了突破现有移动核心网设备的性能瓶颈，支持移动核心网向下一代移动网络（面向IMS）的演进，业界提出了基于IP的、兼容2G／3G、面向IMS的移动软交换核心网建设思路：即建设以软交换技术为核心，将业务承载与信令控制分开，基于IP承载的面向3G、IMS的软交换核心网。这种核心网既支持现有2G网络，又支持未来的3G网络，还支持TDM／IP混合组网。本文以陕西移动为例就移动核心网如何转型以适应未来3G、IMS格局，作几点分析。     

蜂窝物联网核心网目标架构演进探讨

物联网存在面向2G、4G、窄带物联网（narrow band Internet of things,NB-Io T）的传统专用核心网以及面向5G的toB物联网核心网。随着网络的进一步云化演进，为简化网络、增强能力、提升效益、方便运维，需要明确面向未来的物联网核心网目标架构。基于现网存在的问题，结合网络演进驱动力，对物联网网络演进目标架构、演进策略以及业务解决方案进行了分析和探讨，以此为运营商物联网规划建设提供参考。     

关注网络转型:中兴通讯2G/3G核心网演进策略

2G核心网现状:网络转型日益迫近目前2G核心网主要分为本地网和汇接网,网元包括MSC、HLR、GMSC、TMSC、LSTP等,本地网采用网状网组网,话路路由信令组网复杂。这种组网模式势必导致新业务开发、业务升级工作量巨大、周期较长。随着3G的来临,2G核心网面临着更多的困难,例如网络结构复杂、运营成本较高、新业务提供缓慢、与下一代网络融合较困难等,2G网络向3G网络转型的问题也就成为当前移动运营商要考虑的重点,本文将从核心网演进的角度,阐述中兴通讯的2G/3G核心网演进策略。中兴通讯2G/3G核心网演进策略3G网络要求核心网不仅要满…     

中兴通讯2G/3G核心网演进策略

一、2G核心网现状目前2G核心网主要分为本地网和汇接网,网元包括MSC、HLR、GMSC、TMSC,LSTP等,本地网采用网状网组网,话路路由信令组网复杂,与MSC数量的平方成正比。这种组网模式势必导致新业务开发、业务升级工作量巨大、周期较长。二、中兴通讯2G/3G核心网演进策略3G网络要求核心网不仅要满足大容量、组网简单,更要求可以快速的提供各种丰富的业务,目前的网络情况很显然不能满足上述需求。电信网络的发展趋势是移动化、多媒体化、个性化,IP技术是实现这一目标的基础。IP技术使得传统电信网络的组网模式面临着很大的挑战,分离的多业务网络向单一的宽带多业务网络演进,垂直的网络向分层的网络演进,分层的TDM网络向扁平的IP网络演进。     

阿尔卡特朗讯面向移动业务IP化的分组传送解决方案

分析了在移动IP化趋势下移动传输网向PTN演进的迫切需求,介绍了阿尔卡特朗讯1850全业务交换传送平台（TSS）解决方案,包括基于1850 TSS的移动传输网演进建设方案以及墨西哥运营商Telmex选用1850 TSS系列产品和光多业务节点（OMSN）建设面向全业务运营的综合传送网络的情况。     

固网软交换向IMS演进方案

固网软交换向IP多媒体子系统(IMS)演进应采用合理的方法、步骤和策略。演进可以在继承原软交换(SS)公共交换电话网络业务仿真子系统(PES)业务功能的前提下,平滑地向IMS演进,逐步引入、扩展多媒体和移动业务,实现核心网层面的固定和移动融合(FMC)。下一代网络(NGN)核心控制层的软交换和IMS在基本架构上没有实质冲突,软交换主要面向公共交换电话网(PSTN)仿真业务,而IMS为实现FMC和多媒体业务,在移动性、安全、服务质量(QoS)、开放业务架构等方面作了有益的扩展,软交换向IMS演进在技术上是完全可行的。对于已经采用软交换的运营商,采用演进的方式实现基于IMS的全业务的NGN网络,可以节约投资,减小网络改造风险,降低运营成本。     

移动核心网的发展与演进研究

文章阐述了移动通信核心网各个发展阶段组网的特点和使用的技术，分析了移动核心网向下一代网络发展的趋势和演进方案，最后指出融合将是下一代网络和业务发展的主旋律。     

基于IP的移动软交换核心网组网策略

软交换技术是向下一代网络演进的核心技术。在移动核心网中引入软交换技术，可以实现核心网内资源的共享和集中控制。从而提高整个网络的利用率、降低运营成本。当前软交换技术已经成熟，提供业务的能力也得到了验证，因此目前在移动运营商的2G核心网络中都大量使用移动软交换设备，目前的应用模式多为软交换设备、分离架构、TDM承载语音的软交换组网方式。随着IP骨干网的建设初具规模。为了最大限度地提升骨干传输网的利用率和网络投资的效益，进一步发挥软交换技术的优势，在现有条件下的GSM核心网络中实现VoIP（语言IP化）和信令IP化、宽窄带信令互通是目前2G移动核心网的发展方向。本文将主要讨论基于IP的移动软交换在2G网络中的应用方案。[编者按]     

迈向未来的分组核心网

核心网的发展方向 随着3G的日益临近,移动互联网的光明前景正在成为现实。作为电信网络的一部分,无线核心网络也将由线路交换网络向分组交换网络演进。具体到核心网,运营商必须明确这样几个问题:什么技术将成     

基于SDN-NFV的移动核心网联动机制研究

移动互联网的用户数量大幅度增加,对移动流量的需求日益增多,这给移动核心网中的业务带来极大的挑战.在这种不利形势下,基于SDN-NFV的移动核心网联动机制可以科学高效的对复杂业务进行处理,对业务链与匹配策略进行动态更新,能最大限度的保障通信模式,极大提高服务质量.相关实验研究显示,基于SDN-NFV的移动核心网联动机制对提高移动网络的灵活性有非常重要的促进作用.     

移动互联网安全探讨

介绍了移动互联网的基本概念和安全问题,指出由于移动互联网的终端、网络、业务和人们的需求所具有的特点和未来的演变,将会面临严峻的安全问题。在互联网上,业务模式、运营模式都已经固定,我们只能通过补丁方式来改善安全。但是在移动互联网上,我们需要,也有可能对安全做较全面的规划,在快速发展的同时最大程度满足安全需求。     

5G核心网关键技术布局及应用的探索

5G移动通信技术逐渐深入到各领域中,只有实现5G移动通信技术在各行业领域中的全覆盖与高效应用,做到核心网络的合理、关键布局,才能为移动互联网创建低延时性、覆盖面广、链接数量多的信息数据传输环境,使其满足不同客户的个性化需求,实现在多个场景的灵活运用及实际应用场景的相互切换。这也间接表明,人们对5G核心网的编排架构与管理提出了更高的要求。     

Referenzarchitektur für Zugangsserver in öffentlichen Funknetz-Hotspots

This paper introduces an access server developed at the Institute of Broadband Communications at Vienna University of Technology, which can be used for an IEEE 802.11 conformant public wireless network infrastructure. Customers are able to gain Internet access at so called hotspots. It is expected that the idea of roaming, which is already known from cellular mobile telephone networks, will play an important role in the near future. This puts new demands on network access servers like standardized and secure authentication and accounting of mobile customers.     

Voice and Internet Multimedia in UMTS Networks

Voice telephony is the predominant service on today's cellular mobile networks, in terms of number of customers, revenues and network usage. However, it is difficult to predict how long this will be the case given the rising demand for new Internet multimedia services. It is therefore essential that 3rd generation (3G) mobile networks support a voice telephony service, but also that these networks are also capable of providing Internet multimedia services using the same technology.This paper provides an overview of how voice telephony is provided in the initial phase of the universal mobile telecommunications system (UMTS). It then describes how this is expected to evolve in later phases — so that voice telephony becomes one of a large number of multimedia services provided from a common Internet protocol-based mobile network.     

Power Consumption Based Simulation Model for Mobile Ad-hoc Network

Mobile ad-hoc network has limited battery power. Power consumption control is the main issue in mobile ad-hoc network. Node battery power is a precious resource that should be used in order to avoid the early termination of nodes. Energy management model and power consumption control flow chart is proposed to control power consumption by reducing data transmit time in mobile ad-hoc network. Simulation model has been used to analysis the energy consumption of a node. This has been achieved by estimating the time spent in transmission of data by node. The proposed model has been simulated using OMNET \(++\) simulator. Simulation results show significant energy savings after applying the proposed model and flow chart.     

Mobile sensor network programming system

Sensors carried by moving objects in the cities can be used in various applications such as environmental monitoring, traffic control and recreational purposes. A mobile sensor network can be formed by sensors carried by people or buses. In this paper, we will present a mobile sensor network programming system (MSNPS) that can program or reprogram such mobile sensor networks. The programming process is usually initiated by a user from the Internet. MSNPS uses a gateway protocol to bridge the Internet and sensor network, so that control and data messages can be exchanged between these two networks. MSNPS sends the program data to the targeted sensor platforms using a tree structure formed by control messages. We developed a prototype implementation, and analyzed MSNPS system performance. We also simulated the system in a mobile sensor network.     

第三代移动通信网的技术倾向

简述未来的第三代移动通信网ＩＭＴ ２０００准备提供高速数据业务的基本设想,即在移动核心网中加设“通用分组无线电业务”,以便连往Ｉｎｔｅｒｎｅｔ。进而说明空中接口倾向于使用“宽带码分多址”和“时分双工”的制式,而在无线电接入网中加设“无线电网络控制器”,该控制器与基台之间则利用异步转移模式及其新型适配层的交换技术和信令规约。     

移动互联网现状与趋势浅析

通过对移动互联网概念及组成要素的介绍,对移动互联网的体系架构、商业模式、业务应用等热点问题的论述,总结了移动互联网下一步的发展趋势。笔者认为随着手机终端的价格下降和运营商网络能力的进一步提升,移动互联网必将更深层次、更广泛地走入百姓生活的方方面面,进而改变人们的生活习惯。移动互联网正在将互联网由最初的只供浏览的数据网络转变成商务、社交、生活、购物、娱乐的应用网络。     

Gateway load balancing using multiple QoS parameters in a hybrid MANET

A Mobile ad hoc network (MANET) is a self configurable wireless network in which mobile nodes communicate with each other in a multihop fashion without any pre-installed infrastructure. A MANET can be considered to be a standalone network. To enhance the connectivity of a MANET it can be connected to the fixed network, thus forming a heterogeneous network. The integration of MANET and the Internet is called a hybrid MANET which is facilitated by special nodes called Internet gateway nodes. Load balancing among gateways is a challenging task when a MANET is connected to Internet. Gateway nodes with higher loads will lead to disconnected networks and depletes the node’s resources which include their batteries, memory and bandwidth quickly. Gateway selection based on the shortest path may increase traffic concentration on one particular gateway which leads to congestion and increases delay in the network. In this paper a QoS based load balancing mechanism has been proposed among multiple gateway nodes that provide communication between mobile nodes and fixed nodes in the Internet to select lightly loaded gateways so that more packets will be delivered to the fixed host in the Internet. The proposed QoS based scheme selects four QoS parameters that are (1) connecting degree, (2) interface queue length, (3) routing table entries and (4) hop count. A weight based method is used to select the gateway which combines all four QoS metrics. Simulation results demonstrate that when compared with individual parameter, the average ETE delay, queue size and traffic load of gateway generated by proposed algorithm is decreased by 17, 25 and 15 % respectively and when compared with existing schemes, the average ETE delay, queue size and traffic load of gateway is decreased by 25, 25 and 16 % respectively.     

移动通信网承载物联网业务的研究

通过对典型物联网业务的分析,总结物联网业务特性及其对移动通信核心网的需求,进而分析各类需求对现有移动通信网的影响,对典型需求提出了相关解决方案,并提出核心网演进阶段目标。