Introducing Widget-based IMS Client Applications

Classic telecommunication methods and Internet services are converging. For this reason Telecommunication companies are looking for new ways to include their services in Web 2.0 applications. A strong candidate for the telecommunication infrastructure of the future is the IP Multimedia Subsystem (IMS), an all IP telecommunication core network. In the last few years a new kind of application has increasingly gained popularity: they are known as widgets. Widgets are small but fancy applications based on Web technologies that are very easy to develop. This paper describes a new approach to combining widgets with telecommunication features, such as Voice over IP calls or messaging, using IMS. Our solution includes a new abstraction layer with interfaces for the different telecommunication capabilities. Moreover, we implemented a widget engine that makes these telecommunication interfaces available to its widgets. Our solution allows the rapid development of new IMS client applications and a short time-to-market. The combination of other Web 2.0 services with IMS features becomes an exploitable opportunity.     

面向业务体系结构：开创下一代电信业务新局面

传统上基于信令的电信业务控制体系和由此发展出来的智能业务体系,甚至包括被视为电信网络发展方向的下一代网络（NGN）和IP多媒体子系统（IMS）,在业务生成和业务控制上是封闭的,而且是基于集中式计算模型的,对电信业务的丰富和发展形成了体制性障碍。面向业务体系结构（SOA）、web Services以及web2.0技术是互联网、分布式计算和企业信息化等领域的最新技术。根据OASIS对于面向业务体系结构（SOA）的定义,面向业务概念下的电信业务体系结构比传统电信业务体系结构显著扩充了能力结构、延展了业务的概念、改变了业务接口的定义、增加了从业务到能力的转换机制,并大大简化了应用的形态。     

Web与IMS业务融合技术探讨

Web与IMS分别是互联网业务与电信网业务的主流技术,这两类业务的融合是当前的研究热点。概述了Web与IMS业务融合的实质与场景,总结了业务融合的两种技术方案,即基于集成应用服务器的方案与基于ParlayX网关的方案,并从适用场景、Web服务支持、通信效率及可实现性等方面进行了分析比较。两种方案在适用场景和可实现性方面相当,但是第一种方案具有更高的通信效率,并且支持更多的Web服务模型。因此在通常的应用场合下,可优先考虑采用基于集成应用服务器的业务融合方案。     

IP多媒体子系统支持的移动业务

IP多媒体子系统(IMS)域的引入,方便了移动业务的开展.文章分析了IP多媒体子系统的业务要求、体系结构,重点阐述了基于开放式业务架构(OsA)的IMs业务、基于移动网络增强定制应用逻辑(CAMEL)的IMS业务和基于会话启动协议(SIP)应用服务器的I MS业务.     

基于Web Services的网络管理业务流程管理系统交互接口

该文分析了Wf-XML定义的工作流管理系统之间的互操作机制,分析了基于WebServices技术的网络管理服务描述方法的特点,借鉴MUWS给出的网络管理服务描述方法对Wf-XML尚存的不足进行了改进,定义了网络管理业务流程管理系统交互接口,给出了网络管理业务流程管理系统交互接口的实现及应用场景,该交互接口具有清晰的接口功能划分和良好的可扩展性。     

Web服务应用接口系统的开发研究

随着Web 服务技术的不断成熟,其在异构系统集成应用中的优势逐渐显现,基于Web服务的应用集成技术成为企业信息系统研究的热点。使用方便、实用的Web服务应用接口,也成了互联网通信技术的发展趋势。文中对这一关键技术进行了研究,取得了初步理论与软件成果。另外,文中深入研究了Web服务的基本原理与实现技术、基于Web服务的应用系统集成技术、Web服务应用接口系统的开发原理与技术,提出了一套 Web 服务开发方法、Web 服务应用接口系统的模型框架。在理论研究的基础上,基于Microsoft.NET2003环境,文中还实现了基于模式引导的应用接口包装器的生成与维护软件,其可为不同的应用系统提供Web服务的应用接口,方便客户端调用,还可以简化Web服务应用的编程过程,提高了应用系统开发效率。     

A Management Platform for Commercial Web Services

Web Services offer the promise of allowing BT, along with its customers, partners and suppliers, to be able to assemble distributed applications that span multiple systems and organisations. The commercial drivers for this are cost reduction, new revenue opportunities and a better service through the use of automated end-to-end business processes. To achieve these benefits, BT will require a fully managed internal Web Services infrastructure. At the same time, creating a managed platform for our customers' Web Services deployments provides us with a new business opportunity. Early experience suggests that 20% of the effort in creating a commercial Web Services application is expended in defining the commercial opportunity, the service interfaces and server implementations. The remaining 80% is spent on ensuring that the operational and deployment environment is adequate to support business-grade service levels. Managing that 80% of the problem for our customers is a business opportunity for BT. This paper describes the requirements for a management platform for Web Services and then goes on to describe some of the value added business services that this platform can support. This revised version was published online in July 2006 with corrections to the Cover Date.     

分布式组件与Web服务集成技术研究

分布式组件技术将事务逻辑和系统服务相分离，简化了系统开发的复杂性，已经成为企业应用开发的主流技术．但缺乏Web接口和通信协议难于穿越防火墙的局限性制约了其在Internet环境下的应用。Web服务是近年来提出的一种新的面向服务的体系结构，主要用来开发基于Internet的服务。针对分布式组件技术在Internet环境下数据共享和应用集成的局限性。提出了分布式组件技术和Web服务集成的方案，并以CORBA为例说明了集成中的关键技术。     

IMS组网策略研究

IMS(IP多媒体子系统)作为业界公认的核心控制层融合技术,在运营商推进网络融合进程中备受关注。通过对IMS规模部署中的组网结构、与其它网络的互通、业务平台建设等方面的研究,建议运营商在IMS的组网结构上,可以依据IMS用户规模和管理机制等因素,以大区或省为单位建设统一的IMS网络;在IMS业务平台建设上,运营商可以依据现有网络情况,灵活选择利用原有业务平台或新建IMSAS来实现业务融合,同时为固网、移动用户提供业务,同时IMS还可满足运营商多媒体业务推广的需求。     

Application-Level QoS Negotiation and Signaling for Advanced Multimedia Services in the IMS

The IP multimedia subsystem (IMS) has been recognized as a reference next-generation network architecture for offering multimedia services over an Internet Protocol (IP)-based infrastructure. One of the key benefits of the IMS is efficient and flexible introduction of new services and access to third-party application providers, thanks to standard interfaces and standardized service capabilities. To support novel media-rich applications across a wide range of user devices and access networks, IMS must support negotiable quality of service (QoS) for IP multimedia sessions. In this article, we describe the application-level QoS signaling as specified by the 3GPP and propose some enhancements based on advanced QoS parameter matching and optimization functionality to be included along the signaling path. We outline various signaling flow scenarios and discuss them in the context of a case study involving an IMS-supported 3D virtual environment, featuring a treasure-hunt-like game.     

基于IMS的组合类多媒体会议业务的研究和设计

本文根据目前3GPP和IETF以及OMA对IMS中会议、群组、Presence以及消息类业务的研究,提出了在IMS环境下组合类多媒体会议(融合消息、群组、电子白板和应用共享)的设计实现方案,并描述了几个具体的业务场景流程.该方案相对于现有的复杂的基于H.323的会议系统更加简单实用.     

Programming Internet telephony services

Internet telephony enables a wealth of new service possibilities. Traditional telephony services such as call forwarding, transfer, and 800 number services, can be enhanced by interaction with e-mail, Web, and directory services. Additional media types, like video and interactive chat, can be added as well. One of the challenges in providing these services is how to effectively program them. Programming these services requires decisions regarding where the code executes, how it interfaces with the protocols that deliver the services, and what level of control the code has. In this article we consider this problem in detail. We develop requirements for programming Internet telephony services, and we show that at least two solutions are required-one geared for service creation by trusted users (such as administrators), and one geared for service creation by untrusted users (such as consumers). We review existing techniques for service programmability in the Internet and in the telephone network, and extract the best components of both. The result is a common gateway interface that allows trusted users to develop services, and the call processing language that allows untrusted users to develop services     

一种基于IMS的集成式安全架构

随着IP多媒体子系统（IMS,IP Multimedia Subsystem）技术的发展和应用,其安全性越来越受到人们的重视,研究IMS的标准组织也从IMS的各个层面对其安全性进行了研究,并制定了相应的标准,如何将这些理论成果有效的组织应用起来则成为当前研究的重点。为此针对如何使用IMS业务控制层来支撑实现业务媒体流的安全问题提出了一种集成式安全架构的解决方法,此安全架构不会破坏IMS的整体架构并且能兼容IMS网络中已有的呼叫控制类设备,可供在IMS安全规划设计和实施建设时参考。     

基于IMS的CDMA视频通信业务关键技术研究

IP多媒体系统（IMS,IP Multimedia Subsystem）是核心网的发展方向,视频通信（VT,Video Telephony）业务是移动网络3G时代的典型应用。针对视频通信业务需求,给出了基于IMS网络实现码分多址（CDMA,Code Division Multiple Access）网络VT业务的方法,并就业务现网实施过程中的关键问题进行了分析研究,提出了操作性较强的解决方案,为运营商部署相关业务提供了技术参考。     

SOA: New Era of Telco Services

Traditional signaling based telecom service control architecture, intelligent network service control architecture, and even Next Generation Network (NGN) and IP Multimedia Subsystem (IMS) that are pictured as the fundamental of future services have become an obstacle for telecom service development because they are closed in service creation and service control and implemented on a centralized computing platform. As newest technologies in Internet, distributed computing and enterprise information services, Service-Oriented Architecture (SOA), Web services and Web 2.0 have been widely recognized in information and service industry in past years. According to the SOA definition of OASIS, SOA will bring tremendous changes in capability, service and service interface, compared with traditional telecom service architecture. Moreover, it adds a capability-service transform mechanism and greatly simplifies application development.     

NGN中的移动多媒体业务平台

IP多媒体子系统作为下一代网络的重要平台实现了固定网络与移动网络的无缝业务传递,丰富了移动多媒体的各种增值业务.IP多媒体子系统具有控制功能与承载能力分离、呼叫与会晤分离、应用与服务分离、业务与网络分离、移动网与互联网业务融合的主要特征,既适用于基于IP的移动多媒体业务,也适用于传统语音、数据和视频业务,是未来移动多媒体业务的发展方向.     

A Mobile Agent-Based Tool Supporting Web Services Testing

The Web services technology has received significant momentum in recent years, because it allows people to easily utilize and integrate existing software applications to rapidly create new business services. However, how to ensure the trustworthiness of a Web services-oriented system remains a big challenge. One critical issue is how to test a Web service in an effective and efficient manner. In this paper, we report our design and development of a novel mobile agent-based method oriented to Web services testing. We seamlessly integrate an existing testing tool (HP LoadRunner) with a mobile agent technology (IBM Aglet) to build a practical environment for testing Web services. We also report an automatic test case generation algorithm, which analyzes published Web service interfaces and creates boundary value-based, fault injection-equipped test cases.     

IMS与信息应用平台对接测试的方案分析

通过IMS与信息应用平台的对接测试,成功实现了IMS与信息应用平台的互通及资源调用;用户可通过信息应用平台的Web Portal界面登陆MediaX设备,实现多媒体视频通话及会议功能。     

Native intelligence for 6G mobile network: technical challenges,architecture and key features

The application of the artificial intelligence(AI) technology in the 5 th generation mobile communication system(5 G) networks promotes the development of the mobile communication network and its application in vertical industries, however, the application models of “patching” and “plug-in” have hindered the effect of AI applications. Meanwhile, the application of AI in all walks of life puts forward requirements for new capabilities of the future network, such as distributed training, real-time...     

’Reachability’ in converged IMS services — a BT Alcatel-Lucent collaboration

BT has commenced the switch-over to its 21st Century Network — an all-IP based network which will reduce costs and provide a more ‘innovation-friendly’ platform where exciting new services can be rolled out much more quickly and cost effectively. Increasing computing power and openness on the client device coupled with the move to an IP environment fundamentally alters the competitive landscape for service provision, making it much harder to control the customer’s service experience. Further complexity is introduced by convergence — the requirement for services to run across a multitude of networks and devices. The challenge is to create an infrastructure capable of delivering the exciting new own-build and third-party converged services users want while preserving ease of use and security. The IP multimedia subsystem (IMS) element of the 21CN architecture is a key enabler in reaching these goals. Alcatel-Lucent is a vendor with a strong track-record both in supplying IMS products and in ongoing research activities, considering improvements and extensions to the current IMS standards. This paper summarises activities to date in a research collaboration between BT and Alcatel-Lucent which is looking at the area of improved intelligence in the provision of converged services over an IMS architecture. The collaboration utilises capabilities produced by Alcatel-Lucent’s research department called the Reachability Server to implement a number of novel converged service scenarios. The paper introduces the Reachability Server, describes the collaboration, summarises the scenario implementation work completed to date and presents a number of conclusions and observations.