Enhanced video phone services for NGN/IMS

A Next Generation Network (NGN) has been developed in Taiwan, where IP Multimedia Subsystem (IMS) plays an important role to offer IP‐based multimedia services. Such NGN/IMS networks have also been deployed worldwide. However, details of commercial‐grade NGN service implementations are seldom reported in public. In this paper, we show how existing video phone service can be enhanced through Chunghwa Telecom's NGN/IMS. Specifically, we illustrate three examples including Multimedia on Demand (MOD) TV, Multimedia Ringback Tone (MRBT), and Easy Go (EzGo). We also measure the delay times for accessing these services. The measurements indicate that performance for these IMS‐based services is satisfactory. Copyright © 2010 John Wiley & Sons, Ltd.     

Convergence of Broadcast and New Telecom Networks

The demand of the new telecom industry for cost efficient provision of mobile multimedia services is faced with the reality of scarce radio resources. The requirement of spectrum efficiency has driven the development of various digital radio technologies that have been optimized for specific services, namely for broadcast or for mobile communication. However, existing and emerging multimedia services exhibit challenging requirements in terms of asymmetry, interactivity, real-time, and multicast communication. This paper describes an IP based multi-radio infrastructure that enables the co-operation of existing radio networks to combine their capabilities to ensure a spectrum efficient provision of high-quality mobile multimedia services. Further the need for a dynamic allocation of spectrum to radio services is motivated. The basic functionality and the architecture of a multi-radio system is outlined, with a special emphasis on the cooperation between different radio systems. Further an evolution path for the convergence of broadcast and new telecom is desribed, starting from today's systems and leading to a fully coordinated system.     

下一代网络业务开发和控制平台的标准化研究

下一代网络对业务的快速开发和部署需求越来越迫切,需要在网络能力开放的基础上进一步开放业务的能力.本文对与下一代网络的业务开发和控制相关的两大主要标准化组织3GPP和OMA进行了详细研究,阐述了3GPP IMS作为下一代网络业务开放的统一的控制平台的工作机制,分析了OMA业务环境OSE的概念和思想,并详细分析了OSE与IMS的关系.最后以PoC业务为例阐明了下一代网络的业务开发模式及业务之间的调用关系.     

Using PARLAY APIs Over a SIP System in a Distributed Service Platform for Carrier Grade Multimedia Services

The implementation of new mobile communication technologies developed in the third generation partnership project (3GPP) will allow to access the Internet not only from a PC but also via mobile phones, palmtops and other devices. New applications will emerge, combining several basic services like voice telephony, e-mail, voice over IP, mobility or web-browsing, and thus wiping out the borders between the fixed telephone network, mobile radio and the Internet. Offering those value-added services will be the key factor for success of network and service providers in an increasingly competitive market. In 3GPP's service framework the use of the Parlay APIs is proposed that allow application development by third parties in order to speed up service creation and deployment. 3GPP has also adopted SIP for session control of multimedia communications in an IP network. This article proposes a mapping of SIP functionality to Parlay services and describes a prototype implementation using the SIP Servlet API. Furthermore, an architecture of a Service Platform is presented that offers a framework for the creation, execution and management of carrier grade multimedia services in heterogeneous networks.     

三网融合下电信业务平台及终端融合趋势探析

三网融合给用户带来便利性的同时,也给电信运营商带来冲击.从三网融合关键业务(IPTV、互联网视频、手机视频、三屏共享)着手,对三网融合下电信业务平台技术方案进行了分析,并提出了业务平台及终端的融合趋势.     

基于H.323标准的IP电话附加业务

随着IP电话的快速发展，用户对IP电话新业务的需求也日益增长，传统电话业务正在被移植到IP多媒体电话系统中。由于IP电话系统在信令结构方面与传统电话系统的集中模型有本质的区别，因此基于IP电话系统附加业务的开发和控制协议具有不同的特点。描述了基于H.323标准的附加业务的信令结构和业务设计，并将其与传统电话交换业务模型进行了比较。     

富通信发展趋势研究

随着移动互联网的高速发展,电信业务和互联网业务融合的趋势愈发明显,传统运营商和互联网业务提供商之间的竞争将更加激烈。富通信正是在此背景下应运而生。本文从标准化、市场、技术等层面介绍富通信当前的发展现状,分析其未来的发展趋势,并进一步对运营商引入该技术提出了建议。     

UMTS的IP多媒体子系统

基于IP的多媒体业务将成为未来移动通信网的主要业务，为了适应未来移动通信网的发展，必须在核心网中增加专门处理IP多媒体业务的功能实体。本文详细介绍了UMTS的IP多媒体子系统及其提供的多媒体业务。     

Business communications standardization in ETSI

Enterprise networks are in the process of a major and rapid evolution toward IP. At the same time, the 3GPP IP multimedia subsystem is gaining momentum in the telecom industry as the target architecture for delivering and controlling multimedia services in carrier-grade IPbased networks. As a logical consequence, standards are emerging that enable the support of business trunking and hosted enterprise services using the IMS. This article provides insight into the benefits of this approach and takes an in-depth look at related ETSI standards.     

IP电话的管制问题

ＩＰ电话的出现不仅给传统电信市场带来了冲击,同时也产生了一系列政策和法规方面的问题。此外,ＩＰ电话管制问题的复杂性使各国管制机构陷入进退两难的矛盾境地：或者将其纳入正常的电信管制范围,使其不堪重负而放慢发展速度甚至过早夭亡;或者让其不受约束地自由发展,从而由于不正当地避开国际结算和普遍服务等费用支出,而损害电信市场竞争的公正性。尽管目前各国的态度和做法存在许多差异,但有一点大家的认识基本上达到了一     

基于RTP协议的IP电话QoS监测及提高策略

介绍了多媒体通信的发展趋势和当前存在的问题,对基于RTP协议的网络电话中音频数据传输技术进行了研究,对影响实时传输质量QoS的典型因素进行了分析。在局域网的环境下进行了语音包分析实验,探讨了基于RTP协议的QoS动态监测方法,并提出可行的改进方案。     

Transporting data between wireless applications using a messaging system—MMS

There is a demand for using messaging systems to transport data between wireless applications in mobile communications. As multimedia messaging service (MMS) is a promising messaging system to meet the demand, it is under enhancement in related standardization bodies to make it effective in transporting application data. The enhancement should be compatible with the existing MMS services for its smooth and safe deployment. This paper proposes a solution to make the enhancement backward compatible, so that a new MMS service of transporting application data has no impact on the existing MMS services. The solution also provides forward compatibility, so that an MMS service of transporting application data does not hinder the introduction of any application in the future, allowing instantaneous deployment of a wireless application. The standardization bodies did not define any format for data communication between a wireless application and MMS in a terminal. A common format in this regard would help mass availability of wireless applications for different purposes independent of manufacturing a mobile terminal. Based on an analysis described in this paper, eXtensible Markup Language (XML) is the suitable format for the purpose. This paper also presents examples of XML file to indicate what data should be communicated in this regard. Copyright © 2006 John Wiley & Sons, Ltd.     

Deployment issues for the IP multicast service and architecture

IP multicast offers the scalable point-to-multipoint delivery necessary for using group communication applications on the Internet. However, the IP multicast service has seen slow commercial deployment by ISPs and carriers. The original service model was designed without a clear understanding of commercial requirements or a robust implementation strategy. The very limited number of applications and the complexity of the architectural design-which we believe is a consequence of the open service model-have deterred widespread deployment as well. We examine the issues that have limited the commercial deployment of IP multicast from the viewpoint of carriers. We analyze where the model fails and what it does not offer, and we discuss requirements for successful deployment of multicast services     

支持语义互操作的以用户为中心的融合服务架构及关键技术

提供动态自适应的、上下文感知的普适服务是泛在融合网络的发展目标,现有的基于传统分布式计算技术的电信服务开放架构已经无法满足未来以用户为中心的智能化融合服务的发展趋势。该文提出了以用户为中心的融合服务提供模式的重大转向,并在此基础上提出了支持语义互操作的以用户为中心的融合服务架构及涉及到的关键技术。该方案能够在语义层次上实现电信网与互联网在服务层面的无缝融合,从而形成一个虚拟融合的服务计算环境。     

IPTV--三网融合的开端

IPTV与目前的3个运营网（有线电视网、Internet和电信网）及其业务直接相关。但不同运营商对IPTV业务有不同定位。电信运营商认为IPTV业务体现于电视节目在IP网中的组织和传送形式，有线电视网络运营商认为IPTV业务是利用有线电视网来提供数字电视节目和电视节目以外的信息服务。由于IPTV业务分为广播业务和交互型业务两大类，支撑这两类业务的承载网也相应地分别采用单向广播网和双向交互网，因而在承载网层很难融合。融合工作将在业务层发生，即充分利用已经存在的两个承载网来经济、高效地发展业务。IPTV中既拥有广播型业务，又拥有组播型业务，还拥有交互型业务，将是三网融合的开端。     

Broadcasting and Communication Convergent Network Based on MPEG‐21: Design and Implementation of Multimedia Service Framework

In this paper, we present a practical implementation of the MPEG‐21 multimedia framework for broadcasting and communication convergent services. MPEG‐21 standard technology was exploited to build a convergent service framework. Using this framework, a service model and several scenarios have been successfully designed and implemented. In addition, interoperability, which is the main objective of a multimedia framework, especially in a convergent environment consisting of heterogeneous networks and various types of devices, has been addressed in detail. The experimental results show that the implemented test bed provides a next‐generation multimedia service; that is, universal multimedia access (UMA), meeting the requirements of a broadcasting and communication convergent environment.     

基于IMS的多媒体彩铃业务的设计和实现

多媒体彩铃(MRBT)业务是一种采用多种媒体作为回铃音的增值业务.结合IMS网络体系结构和MRBT业务属性,提出一种利用多媒体彩铃业务平台来实现MRBT业务的方案,包括系统设计和基于SIP(会话发起协议)的信令流程.同时,给出相关的特点分析并进行总结.     

构建面向综合业务的有线电视网

有线电视运营商以互联网业务需求采用的CableModem技术作为数据回传手段，已不能满足宽带数据应用和内容对带宽的需求，没有高性能的双向网络是一直制约有线电视网的信息化发展进程的要素。随着数字电视的发展与推广，有线电视网的数字化和信息化再一次得到关注，新的业务、技术和设备不断涌现，有线电视网发展面临着新的机遇，如何构建面向综合业务的有线电视网将是实现重大突破的基础与方向。从综合业务需求、网络演进、双向接入技术发展以及网络架构设计的角度出发，全面分析了有线电视网的发展趋势，提出了基于有线电视网现状的发展演进的网络架构，这对有线电视运营商的业务发展和网络长远规划具有很强的实践指导意义。     

3GPP多媒体子系统研究

介绍了第三代移动通信系统中Release 5版本IP多媒体子系统的网络构架、QoS和业务,对IM系统中各个网络实体的功能进行了简单的描述,对IM与SIP软交换的结合以及承载在IP网络上所需的QoS进行了探讨,并介绍了可以承载在IM系统上的各种业务,最后,对GGSN如何适应IM系统业务这一关键技术进行了简单介绍。     

综合智能网实现技术

结合文献理论的研究，采用与固定电话智能网对比的研究方法，分析了综合智能网的特点、组成结构和运用前景，并提出了两段式实现设想：第一步，在服务的底层调用应用编程接口(API)，将多种电信协议进行映射；第二步，实现业务控制点(SCP)的软件架构向开放服务结构(OSA)过渡。在对服务需求的增长和市场竞争日益剧烈的背景下，电信运营商需要一个能有效地利用原有的网络，同时能为多个网络的用户提供统一的业务解决方案。综合智能网是电信运营商的一个比较理想的选择。