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检索条件"任意字段=International Conference on IP Multimedia Subsystem Architecture and Applications"

共 839 条记录，以下是411-420 订阅

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Optimal Model of Service Discovery architecture Based on IMS

Optimal Model of Service Discovery Architecture Based on IMS

引用

9th international conference for Young Computer Scientists

作者： Zhang, Jie Beijing Univ Posts & Telecommun State Key Lab Networking & Switching Technol Beijing 100088 Peoples R China

ISBN: (纸本)9781424441983

ip multimedia subsystem (IMS) realizes the convergence of fixed and mobile networks. In virtue of providing various types of multimedia services among different kinds of access networks, IMS is considered as the core network for future Newt Generation Networks. For detecting the requested services quickly and efficiently, it is necessary for IMS to adopt a valid Service Discovery function. In this paper, we propose an optimal model of Service Discovery architecture based on IMS to support a universal Service Discovery function independent of any specific network access technology. The optimal model analyses are studied by mathematical modeling, theoretical analyses, and numerical simulations.

关键词： Future next generation networks (NGN) ip multimedia subsystem (IMS) performance optimization universal service discovery (USD)

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Using Context Transfer Mechanisms to Improve Mobile IMS-ipv6 Handover Latency and QoS Provisioning

Using Context Transfer Mechanisms to Improve Mobile IMS-IPv6...

引用

2nd international conference on Internet multimedia Services architecture and Application

作者： Farahbakhsh, Reza Movahhedinia, Naser Univ Isfahan Dept Comp Engn Esfahan Iran

ISBN: (纸本)9781424426843

The growing demand for wireless and mobile services has set the recent research sights on mobility support and QoS provisioning for next generation ipv6 networks. To provide seamless communications for such networks, Fast Mobile ipv6 (FMipv6) and Hierarchical Mobile ipv6 (HMipv6) has been proposed. Moreover, 3GPP has introduced ip multimedia subsystem (IMS) as the next generation I P based infrastructure for multimedia services convergence. In this paper, to Improve Mobile IMS-ipv6 Handover Latency and QoS Provisioning we present two context transfer scheme, predictive and reactive, to negotiate QoS parameters and reserve resources along the handover. The proposed schemes improve the service quality. The performances of the proposed mechanisms are evaluated by analysis.

关键词： Context transfer Fast Handover ip multimedia subsystem (IMS) Mobile ipv6 Quality of Service

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Transmission Delay Reduction in IMS by Re-registration procedure modification

Transmission Delay Reduction in IMS by Re-registration proce...

引用

2nd international conference on Next Generation Mobile applications, Services and Technologies

作者： Farahbakhsh, R. Varposhti, M. Movahhedinia, N. Univ Isfahan Dept Comp Fac Engn Esfahan Iran

ISBN: (纸本)9780769533339

As a result of the evolution of computer and networking technologies, the Third Generation Partnership Project (3GPP) has proposed the ip multimedia subsystem (IMS) as a key element in Next Generation Networks (NGN) that supports multimedia services in the packet switched domain. To use IMS services, users should register in IMS network and to have their information be registered in IMS Databases. When transport media is mobile and user handover in the access network, the re-registeration procedure is needed. This is similar to initial register procedure and leads to excessive transmission delay. In this paper a solution is introduced to reduce the re-registration delay by reducing the number of required contacts with IMS Databases. We have compared re-registration time in our proposed scheme with the standard scheme in OPNET modeler 10.5. Simulation results have confirmed better performance for the proposed scheme.

关键词： ip multimedia subsystem (IMS) Re-registration procedure CSCF discovery procedure

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Modular exposure of Next Generation Network services to enterprises and testbed federations

Modular exposure of Next Generation Network services to ente...

引用

2nd international conference on Communications and Electronics

作者： Schreiner, Florian Wahle, Sebastian Blum, Niklas Magedanz, Thomas Fraunhofer Inst Open Commun Syst FOKUS Next Generat Network Infrastruct Competence Ctr D-10589 Berlin Germany

ISBN: (纸本)9781424424252

This paper describes how Next Generation Network and IT multimedia subsystem services provided by Telco networks as well as testbeds and testbed federations can be used in a modular fashion to compose high level multimedia services. The ip multimedia subsystem, specified by the 3rd Generation Partnership Projects (3GPP and 3GPP2), was developed to address Next Generation Network convergence challenges and end-user requirements. As an all-ip overlay network architecture, it aims at providing a platform for provisioning services in a secure and controllable manner, merging the paradigms and technologies of the Internet with the cellular and fixed telecommunication worlds and was also adopted for the Next Generation Network architecture of ETSI TISPAN. In this paper we will outline the requirements on service description, service discovery and service orchestration in Next Generation Networks and distributed testbed environments. We will further describe how to make use of service building blocks to expose network functionalities towards higher service abstraction layers. We will finally display our findings in the light of the Open SOA Telco Playground, one of the Fraunhofer FOKUS testbeds that represents today a first approach to the practical implementation of the ideas described.

关键词： Next Generation Networks service oriented architectures ip multimedia subsystem services federation testbed open IMS playground Open SOA Telco Playground MAMS Panlab

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Integrating IMS with Web Services to enable ip multimedia Service Oriented architectures

Integrating IMS with Web Services to enable IP Multimedia Se...

引用

2nd international conference on Internet multimedia Services architecture and Application

作者： Bertin, Olivier J. HP TSG Software CMS F-06901 Sophia Antipolis France

ISBN: (纸本)9781424426843

The ip multimedia subsystem has provided major advances for ip-based telecom infrastructures and services. The IMS Core network enables a variety of IMS-compliant communications services to interoperate while being accessed through different kinds of access networks, preferably broadband. As both consumer and corporate users are by now used to access services, even communications services through the web and web-based communities and social networks, it is key for success of IMS-based services to be provided with efficient web access, so users can benefit from those new services by using web-based applications and user interfaces, not only IMS User Equipments and Sip protocol. HP CMS has developed the Mobile Personal Community Broadcasting (MPCB) Service, an IMS / Web 2.0 Live Group Video Share application that is an example of IMS video solution with strong Web 2.0 integration. The efficient integration of IMS and SOA architectures will be essential to achieve the desired goals. Both Parlay-X standard WSDL should be supported as well as innovative Web 2.0 web services SDK. One of the key network elements in integrated IMS-SOA environments is the Telecom Web Services Gateway (TWSG), exposing the rich IMS services to the SOA world in an efficient, secured and manageable manner.

关键词： IMS Web 2.0 SOA Sip HTTP WSDL SOAP REST Parlay-X

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Breaking the Silos - Access and Service Convergence over the Mobile Internet 08

Breaking the Silos - Access and Service Convergence over the...

引用

11th ACM international conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems

作者： Leung, Victor C. M. Wong, Terrence TalebiFard, Peyman Univ British Columbia Dept Elect & Comp Engg Vancouver BC V6T 1Z4 Canada

ISBN: (纸本)9781605582351

Conventional network services operate like silos in that a specific set of services are offered over a specific type of access network. As access networks evolve to provide ip-based packet access, it becomes attractive to break these "service silos" by offering a converged set of ip-bascd services to users who may access these services using a number of alternative access networks. This trend has started with 3d generation cellular mobile networks, which have standardized on the use of the ip multimedia subsystem (IMS) to manage user access to a wide variety of multimedia services over the mobile Internet, while facilitating interworking of heterogeneous wireless and landline access networks. This paper reviews the function of the IMS, and presents the use of the Service Oriented architecture (SOA) above IMS to further enable service convergence. Examples of converged services are presented. Technical challenges in network and service convergence are discussed and some recent results are presented.

关键词： Convergence heterogeneous access networks ip multimedia subsystem Service Oriented architecture

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The ip multimedia subsystem with an e-learning management system and integrated video conferencing 08

The IP Multimedia subsystem with an e-learning management sy...

引用

10th international conference on Information Integration and Web-based applications and Services, iiWAS 2008

作者： Massoth, Michael Korn, Roman Hochschule Darmstadt University of Applied Sciences Schöfferstrasse 8 b 64295 Darmstadt Germany

This paper is about the implementation and operation of an electronic learning management system with integrated video phoning and video conferencing based on an ip multimedia subsystem. This combination provides an e... 详细信息

ISBN: (纸本)9781605583495

关键词： Video conferencing

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Charging for Multi-Grade Services in the ip multimedia subsystem

Charging for Multi-Grade Services in the IP Multimedia Subsy...

引用

2nd international conference on Next Generation Mobile applications, Services and Technologies

作者： El Barachi, May Glitho, Roch Dssouli, Rachida Concordia Univ Montreal PQ Canada Ericsson & Concordia Univ Montreal PQ Canada

ISBN: (纸本)9780769533339

Flexible charging and QoS provisioning are two of the main motivations behind the ip multimedia subsystem (IMS), defined by 3GPP. We have previously proposed a call differentiation solution for 3G networks. This solution defines different grades of calls with different QoS profiles, and uses a preemptive approach to give priority to more important calls over others. This idea of multi-grade services enables the users to choose the appropriate grade of call for each of their sessions, depending on the priorities/guarantees they require. A suitable charging model is needed for the effective charging and billing of such services. In this paper, we focus on the charging aspects of multi-grade IMS services. The IMS online and offline charging mechanisms are leveraged and extended to tackle this issue. Furthermore, a proof-of-concept prototype, showcasing different multi-grade service charging scenarios, is presented.

关键词： Quality of service

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A Presence-based architecture for the integration of the sensing capabilities of Wireless Sensor Networks in the ip multimedia subsystem

A Presence-based architecture for the integration of the sen...

引用

IEEE Wireless Communications and Networking conference, WCNC 2008

作者： Barachi, May El Kadiwal, Arif Glitho, Roch Khendek, Ferhat Dssouli, Rachida Concordia University Montreal Canada Ericsson and Concordia University Montreal Canada

ISBN: (纸本)9781424419968

Wireless Sensor Networks (WSN) are made up of small devices that can sense context information (e.g. space, physiology, and environment). The ip multimedia System (IMS) aims at the convergence of Internet and cellular networks. It enables the delivery of multimedia services to end-users. Integrating the sensing capabilities of WSN in the ip multimedia subsystem will open the door to a wide range of novel multimedia services. This paper proposes a presence based architecture for the integration, focusing on how the information is conveyed from the WSN to the presence infrastructure (i.e the inbound interface). Presence is an integral part of IMS. It enables the distribution of end-user presence information (e.g. location, availability), a sub-set of context information, to interested parties, generally applications. We introduce the architecture and elaborate some of the required extensions to the 3GPP presence service. The proof of concept prototype is also described. © 2008 IEEE.

关键词： Integration

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Call Setup Performance Improvements over Mobile Satellite Systems Using ip multimedia System

Call Setup Performance Improvements over Mobile Satellite Sy...

引用

international Workshop on Satellite and Space Communications

作者： Sahin, S. Narayanaswamy, K. Campos-Nanez, E. Ericsson Inc Plano TX USA George Washington Univ Washington DC USA

ISBN: (纸本)9781424419470

Today's mobile satellite systems are built to support a packet switched all ip communications infrastructure based on ip multimedia subsystem (IMS) leveraging the benefits of solutions already available in terrestrial networks. IMS technology provides a Sip based open platform that enables operators to introduce multimedia applications quickly and in a cost effective manner. Although IMS is very well suited for terrestrial ip networks, it is challenged by high propagation delay satellite environment with low data rates to provide equivalent levels of quality of experience enjoyed by subscribers of circuit switched systems. In this article, we first provide an overview of Circuit Switched and IMS Packet Switched based call flows for mobile satellite systems. We then concentrate specifically on voice call setup time and show how Circuit Switched architecture provides significantly better performance. Lastly, we propose several advancements on Sip call signaling to improve the IMS Packet Switched call setup times.

关键词： Call Setup IMS Mobile Satellite Systems Sip

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