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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511-520 订阅

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Adaptive content composition system for next generation networks

Adaptive content composition system for next generation netw...

引用

international conference on ip multimedia subsystem architecture and applications

作者： Sanand, S. Anilkumar, V. Raghavan, S. V. Indian Inst Technol Dept Comp Sci & Engn Madras 600036 Tamil Nadu India

ISBN: (纸本)9781424426713

Composing learning material for online education and ensuring quality of delivery (low latency and high bandwidth) is a challenge to researchers in e-learning. The problem is compounded when the computing platforms are heterogeneous. Besides, e-learning as an application presents a highly fluctuating load to the underlying ip multimedia subsystem. Viewed in this light, it appears that an e-learning system with inherent abilities to integrate various multimedia elements that can adapt its output to suit network parameters is the need of the hour. In this paper, we propose a new architecture for the e-learning application - called ACCS - Adaptive Content Composition System - which is capable of composing a knowledge molecule (composed of different media elements) that can parametrically relate to the underlying ip multimedia subsystem (IMS), for ensuring a desired QoS. The ACCS architecture has two dominant layers above the IMS;viz., knowledge management sub-layer and network services adaptation sub-layer. We study the performance of ACCS with synthetic workloads under controlled conditions using a network test-bed, called GeNIe.

关键词： testbed emulation QoS multimedia e-learning

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Blending of external applications with advanced telephony services in the ip multimedia subsystem (IMS)

Blending of external applications with advanced telephony se...

引用

international Conferenc on ip multimedia subsystem architecture and applications

作者： Shacham, Ron Jana, Rittwik Rice, Chris W. Murray, John F. AT&T Labs Res Florham Pk NJ 07932 USA

ISBN: (纸本)9781424426713

Advanced Feature Servers are at the core of enterprise ip telephony, offering traditional services, such as call hold, voicemail and find-me-follow-me. These Feature Servers have begun to be deployed as IMS Application Servers to support both in-house (premises based) or hosted service (ip Centrex) offerings. At the same time, there exist applications that are external to IMS that can provide a richer communications experience, when integrated. The application layer in IMS allows these external applications to be blended with the advanced telephony features. An example of this is the use of Microsoft Office Communicator for call control. Several current implementations integrate this feature through a back-end proprietary interface to specific feature servers. We present an architecture for generalizing this integration with a CSTA/IMS gateway that can interact with any IMS feature server.

关键词： Voip IMS hosting feature integration

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Performance analysis of ip multimedia services over HSDPA mobile networks

Performance analysis of IP multimedia services over HSDPA mo...

引用

international conference on ip multimedia subsystem architecture and applications

作者： Kara, N. Planat, V. Int Inst Telecommun 800 Gauchetiere WestSuite 6700 Montreal PQ H5A 1K6 Canada Hewlett Packard Corp F-38053 Grenoble France

ISBN: (纸本)9781424426713

3G wireless networks aim at supporting real-time multimedia applications such as multimedia conferencing. The 3rd Partnership Project (3GPP) has designed ip multimedia subsystem (IMS) as the solution to provide rich multimedia communication for the Next Generation Networks (NGN). Based on IETF standards such as ip, Sip and SDP protocols, it allows convergence of ip multimedia communications though existing ip networks. Interest in such communications is expected to grow over wireless network. To guarantee real-time and reliable multimedia transfer, there is a need to analyze multimedia traffic deployed over real 3G networks to help network operators identifying the required 3G IMS network capacity. Therefore, we propose to test real-time multimedia Sip communications through HSDPA network using G711 voice and H263 video codecs with different video frame rates. In this paper, we focus on media mean delay, jitter, packet loss and bandwidth use measurements with and without mobility.

关键词： multimedia streaming IMS/Sip 3G networks performance evaluation

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Handling feature interactions for multi-party services in 3GPP ip multimedia subsystem

Handling feature interactions for multi-party services in 3G...

引用

international conference on ip multimedia subsystem architecture and applications

作者： Chiang, Wei-Kuo Tseng, Cheng-Yang Natl Chung Cheng Univ Dept Comp Sci & Informat Engn Chiayi 621 Taiwan

ISBN: (纸本)9781424426713

In this paper, an approach with extended cocoons to detect and resolve the feature interaction induced by the centralized multi-party service is proposed, hereinafter referred to as the ECOMPS. The ECOMPS is built based on the approach presented in [9] which manages the feature interaction between call control services within a single session;therefore, the good characters are inherited. The ECOMPS introduces a cocoon surrounding the centralized multi-party service, called COWS, to modify the original Sip request message to include the information about participants in the multi-party service;in addition, the cocoon for call control services in [9] is extended, called COCCS, to describe the service's execution on the modified request message. Moreover, the ECOMPS can be applied to the service capability interaction manager (SCIM) in 3GPP ip multimedia subsystem (IMS) to detect the feature interaction between Sip application servers where call control services are deployed on, even with the centralized multi-party service involved in the communication. The ECOMPS is also illustrated by taking the multi-party conferencing service as an example. The feature interaction caused by the centralized multiparty party service can be detected and resolved with the ECOMPS.

关键词： feature interaction session initiation protocol (Sip) multi-party service ip multimedia subsystem (IMS) service capability interaction manager (SCIM)

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Secure IMS access signaling

Secure IMS access signaling

引用

international Conferenc on ip multimedia subsystem architecture and applications

作者： Balakrishnan, Meera Bose, Mousom Infineon Technol India Pvt Ltd Bangalore Karnataka India

ISBN: (纸本)9781424426713

This paper is focused on constructing a secure access solution for signaling between the ip multimedia Services User Equipment (IMS UE) and the IMS network, from components well-accepted to be secure. By complying with the access-security related Third Generation Partnership Project's standard we ensure signaling interoperability of the solution. Additional considerations for the solution include carrier-grade robustness, when modifying security parameters for increased security, for example, and an ability to operate in any Internet Protocol (ip) network environment to which the UE happens to attach.

关键词： signaling multimedia security robustness

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Enriched conference

Enriched conference

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international Conferenc on ip multimedia subsystem architecture and applications

作者： Arunprasath, R. Pradeep, R. Sreevatsa, Dwaraka Samsung India Software Operat Pvt Ltd Bangalore Karnataka India

ISBN: (纸本)9781424426713

With the increasing proliferation of mobile devices with advanced capabilities and coupled with increasing deployments of IMS networks that combine interactive multiparty communications with quality of service features, multimedia conferencing is a service that many end-users will now be able to enjoy. In this paper we propose new techniques to be adapted while initiating a conference in order to have enriched user experience and also optimized utilization of network resources during conference setup. Specifically we propose two methods, Presence Based Instant conference and Ordered Invite, for initiating conference which the conferencing server applies before initiating the conference.

关键词： Quality of service

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ipTV and VoD services in the context of IMS

IPTV and VoD services in the context of IMS

引用

international Conferenc on ip multimedia subsystem architecture and applications

作者： Shiroor, Ravishankar. G. Wipro Technol Next Generat Networks Bangalore 560035 Karnataka India

ISBN: (纸本)9781424426713

ipTV and Video on Demand(VoD) services are becoming means for traditional Service Providers to fight back against the competition from Cable Companies. Many of the large service providers are deploying networks and delivery infrastructure to deliver ipTV and VoD on ip based networks. At the same time, they are looking at the possibility of migrating their traditional PSTN networks towards IMS. Given that the two events happening almost at the same time, Service Providers will need to consider the possibility that ipTV+VoD services could be delivered over IMS network to prevent ipTV+VoD as another service capability of an IMS network. This paper proposes an architecture for deploying ipTV & VoD as services on an IMS based network. It analyzes the short-comings in the IMS specifications and steps taken by standards bodies to address them.

关键词： IMS ip multimedia subsystem ipTV MBMS multimedia broadcast multicast service streaming media services Video on Demand VoD

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Towards a user-centric and quality-aware multimedia service delivery implementation on ip multimedia subsystem

Towards a user-centric and quality-aware multimedia service ...

引用

international conference on Next Generation Mobile applications, Services and Technologies (NGMAST 2007)

作者： Balakrishna, Chitra Al-Begain, Khalid

ISBN: (纸本)9780769528786

ip multimedia subsystem (IMS) originating from the 3GPP is pivotal on the road to next generation all-ip networks. multimedia applications are potential drivers for the adoption of next generation ip multimedia subsystem (IMS) and could be a decisive factor in its deployment. They are expected to generate revenue to the operators and justify their investment in IMS. And for these multimedia services to be widely accepted by the end users, guaranteed and adaptable quality of service provision across heterogeneous access networks and heterogeneous device types is mandatory. In this paper, a generic, adaptive, controlled service delivery framework implementation for multimedia applications on IMS architecture is proposed The framework is designed to be user-centric, adaptable to terminal mobility and session mobility with minimum session disruption enabling a better end-to-end QoS. It is at the session-level, completely user-driven and does not account for the network-level QoS. It employs the Session initiation protocol (Sip), which is the signaling protocol for the 3GPP specified IMS. The purpose behind designing the framework is to evaluate the provisioning of quality-adaptive multimedia services on IMS network and analyze the performance with respect to delay induced by quality adaptation procedures during session and terminal mobility which might contribute towards the end-to-end quality of service delivered to the users.

关键词： IMS B2BUA session mobility adaptive quality

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Reliability of IMS architecture

Reliability of IMS Architecture

引用

Australasian Telecommunication Networks and applications conference

作者： Mendiratta, Veena B. Pant, Himanshu Alcatel Lucent Bell Labs Naperville IL 60566 USA Alcatel Lucent Bell Labs Murray Hill NJ 07974 USA

ISBN: (纸本)9781424415571

The ip multimedia subsystem (IMS) enables an access-agnostic Next Generation Network (NGN) that integrates wireless, wireline and internet technologies. IMS provides for real-time voice and data services over a packet-switched domain via a Session Initiation Protocol (Sip) infrastructure. It also offers a cost-effective platform for the creation and deployment of ip-based multimedia services. Given the wide scope of services that can be offered with IMS it is important to develop a framework to analyze the reliability of these services. Using an IMS reference architecture, this paper presents a network level failover analysis using the IMS architecture capabilities and shows its impact on improving service reliability. We show how to analyze the end-to-end service reliability in terms of detection and recovery mechanisms and redundancy.

关键词： ip multimedia subsystem Next Generation Network Reliability

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IMS enhanced filter and action criteria

IMS enhanced filter and action criteria

引用

international conference on ip multimedia subsystem architecture and applications

作者： Krishnamoorthy, Srini Torres, Jose Miguel Motorola Inc IP Core Engn Schaumburg IL 60196 USA

ISBN: (纸本)9781424426713

In current 3GPP specifications ([2], [3], [4], [5]) initial Filter Criteria (iFC) and also the Shared WC (SiFC) optimization (optional in the specs) are defined as part of the User Service Profile;This is linked to the user in order to allow forwarding of the initial received request to the proper Application Server (AS) running the required service logic. That approach considers that all service logic is performed at the AS and then the only defined action for the iFC (when trigger conditions are met) is to forward the request to the AS. The specifications however allow for additional "call control logic" at the S-CSCF that is outside the scope of the WC controls. This paper presents a solution consisting of extensions to the iFCs schema. This can be used as a way to enable such call control logic the S-CSCF. If SiFC are used, the only impacted network element (NE) would be the S-CSCF.

关键词： Filter Criteria IFC CSCF IMS

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