电信运营商网络IP化演进分析

近年来,电信和互联网在业务和网络上不断融合竞争.IP技术不断深入发展,电信运营商受到互联网的冲击,不断压缩成本提高效率.这些因素全面促进了电信运营商网络由传统的TDM向IP的演进.这种网络演进优化了运营商的网络结构,推动了新技术在网络中的应用.对运营商来说,网络进一步向IP化演进还需要关注运维体制和承载网建设等问题.总之,IP化是网络演进的目标,在演进的过程中还有许多问题需要进一步的深入研究.     

浅谈基于多业务承载IP城域网网络架构演进

文章主要针对运营商IP城域网网络架构进行阐述,根据互联网发展,探讨IP城域网网络架构如何演进以满足多业务承载要求。     

新业务模式下运营商网络演进思路

移动互联网、互联网+、云计算等产业的发展,对运营商网络带来很大冲击。运营商传统网络难以应对新业务变革带来的需求挑战。对此,提出新业务模式下运营商网络演进思路。     

三网融合下基于有线接入的视频业务竞争演进初探

本文介绍了广电运营商的数字电视业务、电信运营商的IPTV业务和互联网视频业务的特点。分析了三网融合下三类业务承载网络的演进方式。指出在广电向NGB网络演进和电信向NGN网络演进完成后。三类基于有线接入的视频业务将变成同质化竞争,最后对广电运营商在三网融合下视频业务的竞争策略提出了建议。     

LTE演进背景下的M2M通信适配技术

M2M技术是智慧城市的关键技术之一.M2M的通信特征和业务特征对LTE演进背景下的通信运营商移动网络系统提出了新的要求.针对M2M通信特征,描述了运营商移动网络的改进进展、改进思路和网络演进的3个阶段.针对M2M业务特征,描述了3GPP的SCS体系、可管理M2M通道以及通过OTA进行运营商切换的GSMA eSIM体系.     

中国移动孙少陵:未来网络不能差于现有网络

随着不断加剧的市场竞争和技术的快速发展,运营商之间的竞争不再是移动与移动、固定与固定的竞争,而是一种全业务的竞争。运营商应该始终围绕业务发展趋势,推动网络的各个层面向下一代网络演进。I T U曾经从技术角度对下一代网络(N G N)进行了定义,中国移动试图从运营商的角度把定义更加完善,并做了一些引申。首先,N G N将从电信网对业务和网络的要求出发,充分利用互联网的先进技术,引入电信网的运营和管理模式,通过商业模式上的创新来实现下一代网络,这是我们总的理解。电信网不同于互联网,对于认证、计费、安全性和Q oS的要求更高,下…     

NGN和软交换

文章介绍了下一代网络(NGN)的标准化进程和基于软交换的网络演进,探讨了软交换与IP多媒体子系统(IMS)的关系.文章认为运营商在面对网络演进时需要采用平滑过渡的手段,所以对新的网络设备提出了新的要求:对于核心网络,运营商希望能够支持多种流量、多种业务,具有丰富的协议、大容量和高性能;对于边缘网络,运营商要求具有丰富的接口能力;对于业务,运营商希望提供灵活有效的业务平台和用户可接受的新型终端设备;对于网络管理和维护,运营商则需要智能化的管理体系.     

从网络的规划建设和运维管理论网络架构

从业务及技术出发分析总结了电信运营商网络的架构及其演进历程。业务主体由话音向数据的变化导致电信网的主体架构也由电路交换网向分组交换网演进,IP网正在逐渐成为所有业务的统一承载网络。互联网本质是"扁平"的,但为克服互联网流量的不确定性以及技术架构的缺陷,IP网在实际建设中采用了一定的分层结构,IP网的分层结构同时也决定了波分网络的分层结构。通过网管系统的集中以及管理架构的简化,实现"一二干融合",是国内电信运营商集约化运营的切入点。     

多媒体加IMS向融合成功迈进

多媒体应用是电信运营商和最终用户共同关注的领域,而基于先进电信技术的新一代电信业务网络将成为电信运营商在今后融合的市场进行差异化竞争的关键.爱立信致力于推动固定移动融合的下一代多媒体电信的基础结构向前演进.IMS是实现丰富业务的技术基础框架之一.爱立信的IMS网络方案涵盖固定网络、宽带网络、电视网络,是一套最适应运营商向全业务运营商演进的网络基础架构.最后介绍了爱立信在网络融合、业务融合所取得的成就.     

利用EDGE技术构建GSM/WCDMA无缝网络

EDGE（增强型数据速率演进技术）是一种3G的无线技术,它可使GPRS网络（通用分组无线业务）的高速数据传输容量增加3倍,并且使GSM运营商能够在现有的基础构架上提供高速的移动互联网业务.运营商采用这种数据通信增强技术,可以将个人用户的数据传输速率提高3倍,或者可以说将使用数据通信的用户数量提高3倍.这样,在一定程度上节约了网络投资的基础上,可以充分满足未来无线多媒体应用的带宽需求.可以说,EDGE技术是GSM技术向3G演进中的重要一步.     

COPS-SLS usage for dynamic policy-based QoS management over heterogeneous IP networks

While each IP domain can deploy its own strategy to manage network resources, multimedia traffic needs end-to-end QoS management to obtain an overall service level. The provision of end-to-end QoS over a heterogeneous environment implies the negotiation of a mutually acceptable SLA. This article presents the use of the COPS-SLS protocol as a generic protocol for automatic service-level negotiation and the integration of this protocol in an overall QoS management architecture to manage service levels over multiple domains deploying different QoS technologies.     

在基于GMPLS的无源光网络中支持端到端QoS

文章首先对下一代网络技术的发展趋势以及IETF服务质量（QoS）机制进行了简单介绍,然后对现有无源光网络技术对端到端QoS支持的不足进行了总结,提出了基于通用多协议标签交换（GMPLS）的无源光接入网QoS服务模型。通过在接入网中引入GMPLS通用控制和管理平台,建立了统一的QoS服务模型,实现了对端到端QoS的有效支持。     

Resource management and quality of service in third generationwireless networks

The third generation networks and services present opportunities to offer multimedia applications and services that meet end-to-end quality of service requirements. The key parts of the standards are already in place, and limited 3G services have already been turned on. While the evolution to 3G occurs, many operators will implement 2.5G interim solutions for a good period of time. We discuss the various evolution scenarios from the present 2G networks to 3G networks. Then we present the UMTS QoS architecture and its requirements, followed by a discussion on QoS in 3G air interfaces, radio access network, and core network     

基于环境感知的可信QoS评价与服务选取策略

面向服务计算网络中,迫切需要对服务实体的QoS与可信性做出客观的评价.针对服务实体QoS的评价通常只是基于对用户感知到的QoS一种加权,不能客观反映实际网络环境下服务实体所能够提供的QoS问题,论文结合服务实体实际服务组合环境来表征服务实体的QoS,提出了一种基于环境感知的可信QoS评价与服务选取策略:(1)采用不同负载下的QoS特征向量来表征服务实体的QoS;(2)建立一种受限于可信实体的信任推理与演化机制,有效避免信任演化机制中信任泛化问题;(3)基于可信实体演化推导服务实体的可信度与QoS的特征向量;(4)结合当前的服务负载情况,较为客观地评价服务实体实际所能够提供的QoS.论文最后给出了综合的可信QoS评价与服务选取算法,实验结果表明了策略的有效性.     

多策略QoS感知的服务选择与排序模型

随着网络中具有相同功能、不同QoS服务的增多,在用户请求服务时,为了确保能找到满足用户功能与质量要求的服务,并对找到的可用候选服务集按一定的策略进行选优,提出了一种多策略QoS感知的服务选择与排序模型。在该模型中,综合考虑服务的性能与运营维护成本等属性,提出了一个扩展的服务QoS模型,在此基础上引入用户、运营商对服务满意度的计算方法,通过改变用户满意度与运营商满意度在排序选优过程中所占的不同比重,灵活设置服务选优策略,有效的解决了服务排序选优问题。搭建了服务选择与排序原型系统,并通过应用实例对上述模型进行了验证。     

A next-generation service overlay architecture

The rapid evolution of next-generation networks and, in particular, fixed mobile convergence infrastructures raises the issue of providing personalized services adapted to the user’s context such as its device, access network, preferences, or quality of service (QoS) requirements. To design such value-added services, one solution consists in composing dynamically distributed service entities. In this paper, we propose a service overlay architecture in which a service level path is dynamically established to fulfill the user’s requirements. In order to meet this goal, two main issues have to be considered: service components discovery and service path management (i.e., setup, reconfiguration, release). The former issue is addressed based on a peer-to-peer approach in which QoS features are integrated in service lookup. For the latter issue, we rely on the Session Initiation Protocol to automate the setup of the service composition as well as its adaptation in case of perturbations (e.g., user switching device or service component failure).     

面向全局约束的QoS分解与服务状态监控机制研究

组合服务QoS需求的全局性和服务QoS状态监控的局部性之间的矛盾使得组合服务的可用性难以满足用户的需求.针对此问题,提出了组合服务的自适应框架,重点研究了全局QoS分配与服务的QoS状态监控机制;通过分析服务的QoS历史信息来预测服务的QoS阈值,从而为全局QoS分解提供启发信息.并引入松弛系数以降低服务自适应的开销.实验表明:通过QoS阈值预测和松弛系数的使用能够实现以较小的自适应开销适应环境变化满足用户端到端的QoS需求,从而提高组合服务的可用性.     

Service quality in TINA: quality of service trading in open networkarchitecture

Enterprise-level QoS issues are discussed, from which QoS evolution paths are derived. Service-level QoS issues are identified, and they have been studied as a part of service quality issues in TINA service architecture. TINA stream binding and its role in the TINA QoS framework are presented. Soft guarantee of stream quality is proposed, which does not require strict resource reservation. The soft guarantee concept combined with TINA stream binding architecture supports progressive evolution of service quality     

Gigabit networking on the public transmission network

The evolution of the public network, from gigabit transmission to gigabit networking, is examined from the perspective of a telephone operating company. The relationship between technology push and service pull and the impact that both have on network architectures are considered. The network transition is discussed to identify ways of cost effectively deploying key enabling technologies (such as asynchronous fibre systems and SONET) in advance of end-user requirements     

A fuzzy modeling based dynamic resource allocation strategy in service grid

One of the major challenges in service grid is to guarantee the promised quality of service (QoS) for all the admitted users or applications, while maximizing the resource utilization through dynamic resource sharing. An efficient resource allocation method should ensure the service QoS and balance the load among service grid nodes which are often highly dynamic, heterogeneous and linked by wide-area network. In this paper, a new dynamic resource allocation method is presented and analyzed based on fuzzy modeling to solve the adaptation between heterogeneous applications with multiple QoS requirements and grid resource. Simulations in service grid with heterogeneous QoS requirements reveal that the proposed dynamic resource allocation method can distribute most suitable resource among the different service quickly and sensitively as the service QoS demand varies under the constraint of achieving maximum utilization of grid resources.