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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341-350 订阅

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Power-Aware Mapping for Network-on-Chip architectures under Bandwidth and Latency Constraints

Power-Aware Mapping for Network-on-Chip Architectures under ...

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4th international conference on Embedded and multimedia Computing

作者： Wang, Xiaohang Yang, Mei Jiang, Yingtao Liu, Peng Zhejiang Univ Dept Informat Sci & Elect Engn Hangzhou 310027 Peoples R China Univ Nevada Dept Elect & Comp Engn Las Vegas NV 89101 USA

ISBN: (纸本)9781424449965

This paper investigates the bandwidth- and latency-constrained ip mapping problem that maps a given set of ip cores onto the tiles of a mesh-based Network-on-Chip (NoC) architecture to minimize the power consumption due to inter-core communications. By examining various applications' communication characteristics shown in their communication trace graphs, two distinguishable connectivity templates are realized: the graphs with tightly coupled vertices and those with distributed vertices. Different mapping heuristics are developed for these templates: tightly coupled vertices are mapped onto tiles that are close to each other while the distributed vertices are mapped following a graph partition scheme. The proposed template-based mapping algorithm achieves on average 15% power saving compared with MOCA, a fast greedy-based algorithm. Compared with a branch-and-bound algorithm, the proposed algorithm can generate results of almost the same quality but require much less CPU time.

关键词： Network-on-Chip (NoC) power-aware ip mapping Template-based Efficient Mapping (TEM)

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ipTComm 2009: Services and Security for Next Generation Networks - Proceedings of the 3rd international conference on Principles, Systems and applications of ip Telecommunications

IPTComm 2009: Services and Security for Next Generation Netw...

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3rd international conference on Principles, Systems and applications of ip Telecommunications: Services and Security for Next Generation Networks, ipTComm 2009

ISBN: (纸本)9781605587677

The proceedings contain 13 papers. The topics discussed include: improving authentication performance of distributed Sip proxies;a comparative analysis of the security aspects of the multimedia key exchange protocols;have I met you before? using cross-media relations to reduce SPIT;using IM and SMS for emergency text communications;distributed media server architecture for Sip using ip anycast;using game theory to configure P2P Sip;a thread synchronization model for Sip Servlet containers;performance implications of hosting enterprise telephony applications on virtualized multi-core platforms;towards automated functional testing of converged applications;feature interactions between Internet services and telecommunication services;abstractions for programming Sip back-to-back user agents;and a policy framework for personalized and role-based SPIT prevention.

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IMS presence authorization applied to Web applications using REST

IMS presence authorization applied to Web applications using...

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2009 13th international conference on Intelligence in Next Generation Networks: Beyond the Bit Pipes, ICIN 2009

作者： Tokunaga, Kazuhiro Baba, Hiroki Takaya, Naoki Kurokawa, Akira NTT Service Integration Laboratories NTT Corporation 9-11 Midori-cho 3-chome Musashino-shi Tokyo 180-8585 Japan

ISBN: (纸本)9781424446940

Presence services are not widespread because there is little interest in a closed presence application in the ip multimedia subsystem/ next-generation network (IMS/NGN). A representational state transfer (REST) API for a presence service in IMS/NGN that can be easily used in a Web application has been proposed to encourage the use of presence services in IMS/NGN. Two problems with the conventional method for a presence REST API are presence authorization in Web applications and increased Sip processing within the IMS. This paper describes these problems in detail, proposes functions and analysis for solving them, and presents a prototype application. © 2009 IEEE.

关键词： Next generation networks

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NODE RESOURCE MANAGEMENT FOR DSP applications ON 3D NETWORK-ON-CHip architecture

NODE RESOURCE MANAGEMENT FOR DSP APPLICATIONS ON 3D NETWORK-...

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16th international conference on Digital Signal Processing

作者： Anagnostopoulos, Iraklis Bartzas, Alexandros Vourkas, Ioannis Soudris, Dimitrios Natl Tech Univ Athens ECE Sch Zografos 15780 Greece Democritus Univ Thrace ECE Dept GR-67100 Xanthi Greece

ISBN: (纸本)9781424432974

Emerging DSP applications have different latency, energy consumption and Quality of Service (QoS) requirements. An implementation of such applications requires a large number of intellectual property (ip) cores, communicating with each other, meeting the energy and latency constraints. Network-on-Chip (NoC) architectures is able to accommodate a large number of ip cores in the same chip implementing a set of complex applications. This leads to different usage of the available buffer space in the routers of the NoC system. In this work we propose power and the systematic design of novel NOC-based architectures, which realize DSP applications. Additionally, we present an integrated node resource management technique that combines priority assignment and buffer sizing so that the NoC system to best serve requirements of the considered Finally, to best of our knowledge, the implementation of DSP applications in 3D NOC architectures took place for first time. DSP applications. The proposed approach has been evaluated both on 2D and 3D mesh topologies by employing an NoC simulator and four real DSP/multimedia applications gaining an average of 34% on energyxdelay product for each application. Finally, to best of our knowledge, the implementation of DSP applications in 3D NOC architectures took place for first time.

关键词： DSP applications Network-on-chip Quality-of-Service 3D integrated circuits

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An agent-based mobility protocol for improved mobile QoS in next generation ip networks

An agent-based mobility protocol for improved mobile QoS in ...

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NCM 2009 - 5th international Joint conference on Int. Conf. on Networked Computing, Int. Conf. on Advanced Information Management and Service, and Int. Conf. on Digital Content, multimedia Technology and its applications

作者： Hassan, Wan Haslina Mahmood, Ahmed M. Fisal, Norsheila School of Computer Technology Sunway University College Selangor Malaysia Faculty of Electrical Engineering University Technology Malaysia Johor Malaysia

ISBN: (纸本)9780769537696

This paper extends our work in developing an agent-based architecture for improved mobile QoS in next generation ip networks. Here the performance of the protocol, called AMP, is evaluated against the IETF's standard Mobile ip protocol in supporting a variety of traffic. The analyses were done using the network simulator ns2 where specialized nodes were developed as part of the protocol. The parameters studied were packet loss and delay. Results from simulations indicate that AMP outperformed Mobile ip especially during handovers in terms of lower packet delay and packet loss under CBR, VBR and bursty traffic conditions. We conclude with a discussion on further work for the proposed architecture. © 2009 IEEE.

关键词： Internet protocols

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A framework for converged video services in the ip multimedia subsystem

A framework for converged video services in the IP Multimedi...

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international conference on Internet multimedia Services architecture and applications, IMSAA

作者： Devdutt Patnaik Ashish Deshpande Aamir Poonawalla Russell Clark Michael T. Hunter Naoki Takaya Arata Koike Georgia Institute of Technology Atlanta GA USA NTT Service Integration Laboratories NTT Corporation Musashino Tokyo Japan

ISBN: (纸本)9781424447923;9781424447930

The ip multimedia subsystem (IMS) is being widely adopted as the standard service delivery architecture for Next Generation Networks. The IMS delivers rich ip-based multimedia services to end users. In order to fully utilize the potential of the IMS, the convergence of the World Wide Web and IMS capabilities is imperative. Services composed of Web 2.0 technologies and IMS based call control and multimedia capabilities are becoming popular. In this work, we focus on video service creation in the IMS, with an emphasis on user generated video content. We discuss the composition of richer video-enabled services, by converging technologies such as the IMS, Web 2.0, presence, location and social networking. We first develop a framework for video streaming over the IMS, using a Media Resource Function (MRF) and an Application Server (AS). We then demonstrate the flexibility and capabilities of our framework, by implementing rich services around video delivery which are suitable for both fixed and mobile terminals. We also provide the basis for a business model when offering these features and services. We further discuss how the video framework can be extended and made available as a web based service using REST and Parlay X APIs.

关键词： Streaming media Social network services Mashups Web sites Network servers User-generated content Next generation networking Laboratories Authentication Quality of service

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A TESTBED IMPLEMENTATION FOR SERVICE BASED BEARER CONTROL IN 3GPP2

A TESTBED IMPLEMENTATION FOR SERVICE BASED BEARER CONTROL IN...

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IEEE international conference on Network Infrastructure and Digital Content

作者： Wang, Yumei Zhang, Lin Liu, Yan Du, Lipeng Mi, Ma Beijing Univ Posts & Telecommun Sch Informat & Commun Engn Beijing 100088 Peoples R China

ISBN: (纸本)9781424448982

The policy and charging control function is defined as PCC (Policy and Charging Control) by 3GPP and SBBC (Service Based Bearer Control) by 3GPP2. It is valuable to establish an experimental testbed for PCC and SBBC to improve and verify the related performance. At present, we can make use of Open Source IMS (OSIMS) and UCT PCF to simulate 3GPP PCC, but there is no testbed for the policy control function of SBBC architecture. In this paper, we implement a new SBBC testbed based on 3GPP PCC Testbed, whose features show that it is closely in line with the specifications of 3GPP2. Several tests are designed to verify various performances of SBBC. The test results show that our SBBC testbed is effective to be used for researches on QoS controlling in future converged networks.

关键词： Service Based Bearer Control Policy and Charging Control ip multimedia subsystem 3GPP2

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User-centric service provisioning for IMS 09

User-centric service provisioning for IMS

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6th international conference on Mobile Technology, Application and Systems, Mobility '09

作者： Islam, Salekul Grégoire, Jean-Charles Institut National de la Recherche Scientifique Montréal QC Canada

ISBN: (纸本)9781605585369

The ip multimedia subsystem (IMS) is a converged framework for delivering voice, video and data communication services to mobile and fixed users. The present operator-centric IMS model, which assume a single operator for the access network, IMS core and application servers, restricts if and how users can access services beyond the IMS core network. The present IMS model, by limiting the subscribers' choice might be rejected by many end users. User-centric service provisioning should establish the users' control and thus commence the customer interest for IMS. In this paper, we study the problems that a user-centric IMS architecture should address, and broaden the scope of our previously designed, third-party service enabled IMS model [21] by showing its use in user-centric service provisioning. Third-party offered service subscription and session setup procedures are explained with two use cases. The Users' profile management and privacy endurance, possible terminal implications are also discussed in the context of a user-centric IMS model. Copyright © 2009 ACM.

关键词： multimedia services

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Interoperability of ip multimedia subsystems: The NetLab approach 2

Interoperability of IP multimedia subsystems: The NetLab app...

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2nd IFip WG 6.8 Joint conference on Wireless and Mobile Networking, WMNC 2009

作者： Marín-López, Andrés Díaz-Sánchez, Daniel Almenárez-Mendoza, Florina García, Francisco Rodríguez Rizaldos, Joaquín López Vega, Alfonso Cubero Ormaetxea, Itziar Lopez, Juan Luis Fernández, Sergio Ortigosa, Fernando Kotuliak, Ivan Mikoczy, Eugen Lahnalampi, Timo Koski, Timo Avessta, Sussana Universidad Carlos III de Madrid Spain Telefónica Investigación y Desarrollo Spain Software Quality Systems Innovalia Group Spain Ericsson Network Services Spain Slovak University of Technology in Bratislava Slovakia Slovak Telekom Slovakia Digital Media Service Innovations Finland University of Turku Finland

ISBN: (纸本)9783642038402

Standardization bodies have spent lots of efforts and have extensively defined ip multimedia subsystem interfaces. While Telcos have started its deployment, IMS-based applications boosting user needs are still to come. Such applications must not suffer from interoperability issues caused by different vendors and different administrative domains. NetLab project aims at exploring such interoperability issues by interconnecting together testbeds at three different countries. Use cases will be defined to find out about interoperability, and also to search for a user appealing application in collaboration with the LivingLabs community. This paper introduces the project vision on the architectural, security, QoS, and interoperability issues, together with new services illustrating the interconnection of testbeds. © 2009 IFip international Federation for Information Processing.

关键词： Interoperability

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A case study on multiparty multimedia game development in the ip multimedia subsystem

A case study on multiparty multimedia game development in th...

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international conference on Intelligence in Next Generation Networks (ICIN)

作者： Chunyan Fu Fatna Belqasmi Mohammed Alrubaye Rajesh Karunamurthy Roch Glitho Ericsson Canada Montreal Canada Ericsson Canada and Concordia University Montreal Canada

The ip multimedia subsystem (IMS) is the main component of 3G networks. It aims at the seamless provisioning of multimedia services to end-users. This paper presents a case study on multiparty multimedia game development in IMS. It first reviews the APIs and tools available for multiparty multimedia conferencing applications (e.g. games) development in IMS. It then presents the semantics of the game studied in the case and discusses the implementation architecture. The game is a revisited version of the well known capture the flag game. We have developed it with the Ericsson Service Development Studio (SDS) and implemented a prototype. The prototype is described along with the performance measurements. The lessons learned are presented.

关键词： Java Prototypes Floors Access protocols Resource management Standards development Measurement Standards organizations Collaborative tools Collaboration

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