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international conference on Networking and Services 2006, ICNS'06

作者： Yahia, Imen Grida Ben Bertin, Emmanuel Crespi, Noel France Telecom R and D BIZZ/PMX/SLA 42rue des coutures 14066 Caen Cedex4 France Mobile Networks and Multimedia Services Department 9 Rue Charles Fourier 91011 Evry Cedex France

ISBN: (纸本)0769526225

New/Next Generation Networks aim to provide mutual trusted ip Based Networks for a multi access network and innovative services tailored to users needs. NGN architecture has been the purpose of several studies within organism of standardization like ITU-T and ETSI. We present here a literature about NGN architecture (NGN) and Next/New Generation service (NGS) requirements: details about functionalities of NGN layers and IMS (ip multimedia subsystem) architecture are in the scope of the paper. We also describe the service management aspects and its challenges while evolution towards NGS. © 2006 IEEE.

关键词： Web services

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On signaling efficiency for call setup in all-ip wireless networks

On signaling efficiency for call setup in all-IP wireless ne...

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2006 IEEE international conference on Communications, ICC 2006

作者： Melnyk, Miguel Jukan, Admela University of Illinois Urbana Champaign United States

ISBN: (纸本)1424403553

This paper analyzes the signaling efficiency for multimedia call (session) establishment in all-ip wireless networking infrastructures based on the Internet multimedia subsystem (IMS) standard framework and CDMA2000 Evolution Data Only Rev. A (EV-DOrA) standard for wireless link transmission. We present a comprehensive, bottom up analysis of signaling delay for setting up multimedia sessions and we evaluate system architecture alternatives to reduce it. Call setup time is particularly critical for interactive applications, such as gaming, push-to-X and Voice over ip (Voip), where user experience of time that takes to start or join a session directly translates in user perception of service quality. Our analysis takes into account a large set of system design parameters across all layers, ranging from radio link properties to IMS processing and specific characteristics of the Session Initiation Protocol (Sip). For an example signaling flow between two mobile users, we derive an important set of numerical results for call set up time under various IMS design scenarios that consider effects of Sip compression efficiency, choice of transport protocols (TCP, UDP) and radio link quality. Based on the results obtained, we propose and discuss new methods to improve the signaling efficiency and to reduce the call setup time. © 2006 IEEE.

关键词： Wireless networks

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Security analysis for ip-based government emergency telephony service

Security analysis for IP-based government emergency telephon...

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1st international conference on Availability, Reliability and Security

作者： Cao, Feng Malik, Saadat Cisco Syst INC Crit Infrastruct Assurance Grp 170 West Tasman Dr San Jose CA 95134 USA

ISBN: (纸本)0769525679

ip Telephony has been adopted to replace the traditional circuit switch networks in various environments. Government Emergency Telephony Service (GETS) is one of the critical services currently provided in the traditional circuit switch network. GETS supports personnel from different organizations performing their critical missions including Incidence Response and Prevention, National Security, and Emergency Preparedness. Because of the convergent infrastructure for both voice and data, how to provide GETS over ip is one of the challenges for ip Telephony to prove its flexibility and strength for large-scale critical services. In this study, we explore many aspects for providing ip-based GETS, such as availability, security, interoperability, and reliability. Based on ip multimedia subsystem (IMS) architecture, the requirements along with some analyses and recommendations are outlined to meet the strict demands for GETS in different convergent paradigms.

关键词： emergency telephony service (ETS) government ETS (GETS) incidence response ip telephony voice over ip security and privacy

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Cost effective location management scheme for moving objects in a ubiquitous ip-based network platform

Cost effective location management scheme for moving objects...

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4th international conference on Software Engineering Research, Management and applications

作者： Shin, Soo Young Park, Soo Hyun Jung, Byeong Hwa Kim, Changhwa Kookmin Univ Sch Business IT Business Informat Commun Lab 861-1 Chongnung Dong Seoul 136702 South Korea Kangnung Natl Univ Dept Comp Sci Kangnung South Korea

ISBN: (纸本)076952656X

As a 4G(Generation) network architecture, ip based IMT network is the architecture which is based on a new concept and proposed to cope with large multimedia traffics generated by mobile communications in the near future as the backbone network for ubiquitous computing networks. During the Paging process in ip based IMT network, Location Manager(LM) makes flooding the Paging packets to every node in Location Area(LA) to which MN is belong. At a result of the defects, the overall network efficiency is significantly lowered to process the Paging of one MN resulting in the waste of network resources. To resolve this problem, this paper proposed novel Paging mechanism using an proxy concept.

关键词： Ubiquitous computing

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SInBAD - A digital library to aggregate multimedia documents

SInBAD - A digital library to aggregate multimedia documents

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Advanced international conference on Telecommunications andinternational conference on Internet and Web applications and Services, AICT/ICIW'06

作者： Almeida, Pedro Fernandas, Marco Alho, Miguel Martins, Joaquim Arnaldo Pinto, Joaquim Sousa Universidade de Aveiro Portugal Campus Universitário de Santiago 3810-193 Aveiro Portugal

ISBN: (纸本)0769525229

The University of Aveiro is currently developing SInBAD, an integrated system for digital libraries and archives. The aim of the project is to build an information system to support the aggregation of multimedia documents such as books, photographs, and audiovisual resources. All these resources are part of the academic life and identity of the University. The architecture adopted in SInBAD is divided into 3 subsystems - Library, Archive and Jazz - and is Web Service oriented. Also, documents are distributed by several Agents in a dynamic manner. The basic description model used in the documents is the element set defined by the Dublin Core Metadata Initiative, although each subsystem may use specific data structures according to the document type and format. In this paper we present the created system, pointing out the interoperability and the web service oriented architecture. Also, despite its distributed nature, users may search simultaneously in all documents. © 2006 IEEE.

关键词： Digital libraries

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An SoC with 1.3 Gtexels/s 3-D graphics full pipeline for consumer applications

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IEEE JOURNAL OF SOLID-STATE CIRCUITS 2006年第1期41卷 71-84页

作者： Kim, D Chung, K Yu, CH Kim, CH Lee, I Bae, J Kim, YJ Park, JH Kim, S Park, YH Seong, NH Lee, JA Park, J Oh, S Jeong, SW Kim, LS Korea Adv Inst Sci & Technol Dept Elect Engn & Comp Sci Taejon 305701 South Korea Samsung Elect Yongin 449711 South Korea

A high-speed three-dimensional (3-D) graphics SoC for consumer applications is presented. A 166-MHz 3-D graphics full pipeline engine with performance of 33 Mvertices/s and 1.3 Gtexels/s, and 333-MHz ARM11 RISC processor, and video composition IN are integrated together on a single chip. The geometry part of 3-D graphics ip provides full programmability in vertex and triangle level, and two-level multi-texturing with trilinear MipMAP filtering are realized in the rasterization part. Per-pixel effects such as fog effects, alpha blending, and stencil test are also implemented in the proposed 3-D graphics ip. The rasterization architecture is designed for reducing external memory accesses to achieve the peak performance. The chip is fabricated using 0.13 mu m CMOS technology and its area is 7.1 x 7.0 mm(2).

关键词： application processor consumer application multimedia 3-D graphics

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ACM international conference Proceeding Series - Proceedings of the 5th international conference on Mobile and Ubiquitous multimedia, MUM 2006

ACM International Conference Proceeding Series - Proceedings...

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5th international conference on Mobile and Ubiquitous multimedia, MUM 2006

ISBN: (纸本)1595936076

The proceedings contain 11 papers. The topics discussed include: rhythm metadata enabled intra-track navigation and content modification in a music player;mobile data broadcasting over MBMS tradeoffs in forward error correction;cross-layer design for providing service oriented architecture in a mobile ad hoc network;a new UPnP architecture for distributed video voice over ip;empirical observations on the emergence of mobile multimedia services and applications in the U.S. and Europe;mobile visual interaction: enhancing local communication and collaboration with visual interactions;imaging as an alternative data channel for camera phones;toolkit for user-created augmented reality games;a QoS management system for multimedia applications in IEEE 802.11 wireless LAN;movable-multimedia: session mobility in ubiquitous computing ecosystem;and wayMarkr: acquiring perspective through continuous documentation.

关键词： Mobile devices

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PROFITIS: architecture for location-based vertical handovers supporting real-time applications

PROFITIS: Architecture for location-based vertical handovers...

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25th IEEE international Performance Computing and Communications conference

作者： Tsiakkouris, Stavros Wassell, Ian Univ Cambridge Digital Technol Grp Comp Lab Cambridge CB3 0FD England

ISBN: (纸本)1424401976

Even though numerous proposals have been made for mobility management schemes in heterogeneous wireless ip networks, no single solution has emerged that is capable of supporting seamless and low latency handovers required to satisfy the stringent delay requirements of real-time multimedia applications. In this paper, we present a location-based mobility management architecture for realtime applications in a heterogeneous network environment. Handover latency is minimised by integrating optimised application layer mobility management signalling using the Session Initiation Protocol (Sip) with location-based information of nearby access points (APs). A newly defined Access Point Location Protocol (APLP) is used to disseminate geospatial information and network parameters associated with various APs to location-aware mobile devices that use this information to construct a virtual map of the APs. An intelligent decision engine (DE) implemented in the mobile node (MN) combines the information provided by APLP with knowledge of the user's mobility pattern and policy preferences to anticipate handovers.

关键词： mobility management location-based Sip

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Location conveyance in the ip multimedia subsystem

Location conveyance in the IP multimedia subsystem

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6th international conference on Next Generation Teletraffic and Wired/Wireless Advanced Networking, NEW2AN 2006

作者： Mosmondor, Miran Skorin-Kapov, Lea Filjar, Renato Research and Development Center Ericsson Nikola Tesla Krapinska 45 HR-10000 Zagreb Croatia

ISBN: (纸本)3540344292

The 3rd Generation Partnership Project (3GPP) has proposed the ip multimedia subsystem (IMS) as a key element in the next-generation network (NGN) converged architecture supporting multimedia services. Extending the IMS towards provisioning support for location based services (LBS) will enable enhanced services and offer new revenues to the system. However, conveying location information in the IMS and connecting the IMS with a real positioning system are still open issues. This paper presents the design and implementation of an IMS Location Server (ILS) integrating IMS with a positioning system. From the IMS perspective, the ILS serves as a service enabler for LBS. Considerable work has been done by the IETF in the area of location information transport based on the Session Initiation Protocol (Sip). This paper proposes some improvements in this area. In order to demonstrate proof-of-concept in enhancing IMS-based services, a Location-aware Push-to-Talk (LaPoC) prototype service has been developed. The service has been integrated and tested with the Ericsson Mobile Positioning System (MPS). The paper also gives the results of performance measurements including traffic load analysis and session establishment time. © Springer-Verlag Berlin Heidelberg 2006.

关键词： multimedia systems

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Supporting ip end-to-end QoS architectures at vertical handovers

Supporting IP end-to-end QoS architectures at vertical hando...

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20th international conference on Advanced Information Networking and applications

作者： Ruuska, Pekka Prokkola, Jarmo VTT Technical Research Centre of Finland P. O.Box 1100 FIN-90571 Oulu Finland

ISBN: (纸本)0769524664

ip end-to-end QoS mechanisms are quite important for users of real-time multimedia applications. Wireless access systems are widely used also with multimedia applications although the access networks may present heterogeneous technologies and diverse QoS mechanisms. Vertical seamless handover between different wireless systems is possible while the Internet's QoS mechanisms are difficult to integrate into the handover procedures. ITEA 's Easy Wireless project develops a new approach to end-to-end QoS in wireless heterogeneous networks In this paper we discuss how the ip end-to-end QoS architectures can be supported when a seamless vertical handover is executed between different network systems. We focus on analyzing the latest standardized versions of the existing wireless 2nd and 3rd generation cellular systems together with WLAN or WMAN technologies. Differentiated Services and Integrated Services are compared and Differentiated Services is found to be more appropriate to support widely roaming users. © 2006 IEEE.

关键词： Computer architecture

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