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5th international Network conference, INC 2005

作者： Negru, D. Mehaoua, A. Pallis, E. CNRS-PRiSM Lab University of Versailles 45 av. des Etats Unis 78035 Versailles France Institute of Informatics and Telecommunications NCSR DEMOKRITOS Agia Paraskevi Attikis 15310 Athens Greece

ISBN: (纸本)9781841022727

Interoperation of Digital Video Broadcasting technologies and ip-based technologies represents one of the main evolutions in next generation of services for digital television and Internet applications. This incredible synergy is jointly driven by the growing number of devices willing to access the Internet and the sensational development of digital broadcasting networks. The profound interest received by multimedia services promoted this expansion. In this paper, we describe a DVB architecture with bi-directionality, thus permitting Digital TV and Internet-based services over a wireless metropolitan area network. A complete ip/DVB inter-working environment is hence presented, mainly dedicated to multimedia services, those being either Digital TV or ip. Approaches for complete management and conformance to quality requirements of each kind of service represent the main framework of the paper. A proposal for an efficient interactive bandwidth management between ip and DTV flows is developed for maintaining a high level of QoS for the desired multimedia applications. © 2005 University of the Aegean and University of Plymouth.

关键词： multimedia systems

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Operations and Management in ip-Based Networks - 5th IEEE international Workshop on ip Operations and Management, ipOM 2005, Proceedings

Operations and Management in IP-Based Networks - 5th IEEE In...

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5th IEEE international Workshop on ip Operations and Management, ipOM 2005

ISBN: (纸本)3540293566

The proceedings contain 21 papers. The topics discussed include: emergency telecommunication support for ip telephony;on the interaction of Sip and admission control: an inter-domain call authorization model for Internet multimedia applications;experimental evaluation of the ip multimedia subsystem;remote service invocation through heterogeneous networks using open environments;modeling of dynamic pricing by market demand in multiple QoS networks;towards an autonomic service architecture;random feedbacks for selfish nodes detection in mobile ad hoc networks;policy-based fault management for integrating ip over optical networks;discovering topologies at router level;comprehensive solution for anomaly-free BGP;automatic configuration for VPN using active XML;and performance of traffic engineering in operational ip networks - an experimental study.

关键词： Telecommunication networks

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An overlay ip network architecture and bandwidth allocation for multiparty multimedia conferencing

An overlay IP network architecture and bandwidth allocation ...

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2005 international conference on Internet Computing, ICOMP'05

作者： Yue, Gaofeng Juang, Biing-Hwang School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 United States

ISBN: (纸本)9781932415698

Advances in multimedia technologies and development of overlay networks foster the opportunity for creating new value-added services over the current Internet. In this paper, we propose a new service network architecture that supports multiparty multimedia conferencing applications, characteristics of which include multi-channel, high bandwidth and low delay tolerance. The new service network architecture is built upon an array of service nodes called multiparty processing centers (MPCs). The MPCs constitute a service overlay network, serving as the infrastructure for multiparty conferencing, and are responsible for conferencing setup, media delivery and QoS provisioning. In this paper, we focus on the bandwidth allocation problem in the proposed service network. The bandwidth allocation problem determines the bandwidth demand for virtual links among the MPCs. multimedia traffic is modeled as M/G/∞ input processes and divided into several classes, with the constraint that the aggregate effective bandwidth is within the link capacity times a prescribed utilization threshold.

关键词： Network architecture

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Efficient hardware search engine for associative content retrieval of long queries in huge multimedia databases

Efficient hardware search engine for associative content ret...

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IEEE international conference on multimedia and Expo, ICME 2005

作者： Layer, Christophe Pfleiderer, Hans-Jörg Department of Microelectronics University of Ulm Albert-Einstein-Allee 43 D-89081 Ulm Germany

ISBN: (纸本)0780393325

Due to the enormous increase in the stored digital contents, search and retrieval functionalities are necessary in multimedia systems. Though processor speed for standard PCs (Personal Computers) is experiencing an almost exponential growth, the memory subsystem handicapped by lower frequencies and a physical I/O (Input/Output) limitation reflects the bottleneck of common computer architectures. As a result, many applications such as database management systems, remain so dependent on memory throughput that increases in CPU (Central Processing Unit) speeds are no longer helpful. Because average bandwidth is crucial for system performance, our research has focused especially on techniques for efficient storage and retrieval of multimedia data. This paper presents the realization of a hardware database search engine based on an associative access method for textual information retrieval. It reveals the internal architecture of the system and compares the results of our hardware prototype with the software solution. © 2005 IEEE.

关键词： Search engines

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Push-to-multimedia as a platform enabler for NGN services 11

Push-to-multimedia as a platform enabler for NGN services

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11th European Wireless conference on Next Generation Wireless and Mobile Communications and Services, European Wireless 2005

作者： Blum, Niklas Magedanz, Thomas Fraunhofer Institute FOKUS Technical University Berlin Germany

ISBN: (纸本)9783800728862

The specification of the ip multimedia subsystem as a service delivery architecture for Next Generation Networks and the introduction of Push-To-Talk (PTT) as an IMS-based service moves Voip applications for mobile devices already to the market. PTT has gained a strong following in the US market and is on the verge of spreading globally, with over 20 operators worldwide trailing the technology and a number of service launches planned in 2004/2005. The Open Mobile Alliance (OMA) currently specifies PTT as an IMS service to assure interoperability between different operator domains and vendors think already about extending PTT with other media types then voice, like video communication, file transfer or service subscription for content push services. Thus, Push-To-multimedia (PTM) does not seem to be that far away from market and is well suited as a framework to enable other IMS applications with PTM functionality. In this paper, we report about our experiences in designing and implementing an extension of Push-To-Talk, using the Parlay API in an 3GPP IMS/Sip environment at the IMS Playground @ Fraunhofer FOKUS. © Copyright 2015 IEEE All rights reserved.

关键词： Next generation networks

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An approach to integrating Sip in converged multimodal/multimedia communication services

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TELECOMMUNICATION SYSTEMS 2005年第3-4期28卷 387-405页

作者： Liu, F Chou, W Guo, WP Wong, WE Avaya Labs Res Basking Ridge NJ 07920 USA Univ Texas Dept Comp Sci Richardson TX 75083 USA

In this paper, we present an approach of integrating Sip (Session Initiation Protocol) in converged multimodal/multimedia communication services. An extensible VoipTeleserver for Voip in Sip environment is described. It is based on the concept of dialogue system and Web convergence that separates the channel dependent media resources from the application dependent service creation and hosting environment. It supports XML based service applications for multiple channels including voice, DTMF, IM and chat over ip. The loosely coupled open architecture in our approach is highly extensible. We describe the concept and structure of VoipTeleServer used in our approach in detail, which interfaces to the Voip world through Sip signaling and works as a broker between the Voip Sip environment and MTip to deliver converged communication services. A prototype of VoipTeleServer was implemented, and services and applications based on Sip and MTip convergence are constructed. Special attention is given to the adverse effect of delay, jitter and packet loss for voice portal services over ip. In particular, case studies of DTMF service in voice portal under adverse channel conditions are performed. The compounding effects of multiple channel impairments to DTMF in voice portal services over ip are characterized. The potential high error rate of the DTMF service indicates that the data redundancy method as proposed in RFC 2198 is needed for DTMF in order to achieve reliable voice portal services over ip.

关键词： Sip voice over ip DTMF detection voice portal

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Urban traffic control:: A streaming multimedia approach

Urban traffic control:: A streaming multimedia approach

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IEEE international conference on multimedia and Expo (ICME)

作者： Palau, CE Esteve, M Martínez, J Molina, B Pérez, I Univ Politecn Valencia Dept Commun ETSIT Valencia 46022 Spain

ISBN: (纸本)0780393317

Urban traffic control systems have based their technological infrastructure both on advanced analogical close-circuit television systems (TVCC) and point-to-point links, providing low-scalable and very expensive systems. The main goal of an urban traffic monitoring system is to capture, send, play and distribute video information from the streets of a certain city. Current digitalization process of video networks, and the research carried out in the field of streaming media, has led vendors to present proprietary hardware and software solutions resulting in a strong dependency among their customers. The existence of open standards for video encoding and protocols for streaming media transmission over ip networks has led us to propose this system. The work presents an open urban traffic control system which bases its design on COTS philosophy for hardware and software, as well as open source and standardized protocols. The proposed system is a suitable solution in terms of scalability, cost, interoperability and performance for traffic control systems. Futhermore, its architecture can be easily adapted to other video applications and tools.

关键词： Street traffic control

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Proceedings of the 9th IASTED international conference on Internet and multimedia Systems and applications, IMSA 2005

Proceedings of the 9th IASTED International Conference on In...

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9th IASTED international conference on Internet and multimedia Systems and applications, IMSA 2005

ISBN: (纸本)0889865108

The proceedings contain 82 papers. The topics discussed include: a packet fair quenching algorithm with controlled compensation for wireless TCP/ip networks;an agent-based network management system;analysis on the effect of packet length on the RTP-based real-time video communications;adaptive traffic engineering effect on router delay using MPLS;IXP2400 network processor architecture for ipSEC application;the design, implementation and application of a BT model in CAN;scene transition based on image registration for web-based virtual tour;architecting e-business infrastructure;globalizing Internet websites;a prototype implementation of VPN enabling user-based multiple association;and search and inference with diagrams.

关键词： Internet

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8th international conference on Management of multimedia Networks and Services, MMNS 2005

8th International Conference on Management of Multimedia Net...

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8th international conference on Management of multimedia Networks and Services, MMNS 2005

ISBN: (纸本)3540296417

The proceedings contain 34 papers. The special focus in this conference is on Wireless networking technologies, Wireless network applications, Overlay network management, multimedia, multimedia and Web applications. The topics include: A new performance parameter for IEEE 802.11 DCF;an energy*delay efficient routing scheme for wireless sensor networks;adaptive supporting prioritized soft handoff calls for power-controlled DS-CDMA cellular networks;performance bounds for mobile cellular networks with handover prediction;adaptive trunk reservation policies in multiservice mobile wireless networks;relevance-based adaptive event communication for mobile environments with variable QoS capabilities;seamless network mobility management for realtime service;setup and maintenance of overlay networks for multimedia services in mobile environments;multicast tree construction with QoS guaranties;a semi-reliable multicast protocol for distributed multimedia applications in large scale networks;multi-domain fault management for internet services;real-time audio quality evaluation for adaptive multimedia protocols;policy based charging in multimedia networks;application-level middleware to proactively manage handoff in wireless internet multimedia;a voice over ip quality monitoring architecture;a distributed scheduling scheme providing QoS in multimedia ad hoc wireless networks;End-to End ‘data connectivity’ management for multimedia networking;improving the SLA-Based management of QoS for secure multimedia services;managing bandwidth in multimedia applications using a market-based middleware;static weighted load-balancing for XML-Based network management using JPVM;application of OWL-S to define management interfaces based on web services and web services based configuration management for ip network devices.

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Interaction of firewalls and network address translators with Internet applications

Interaction of firewalls and network address translators wit...

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8th international conference on Telecommunications (ConTEL 2005)

作者： Aoun, C Davies, E Tschofenig, H Thiruvengadam, S Nortel Networks ENST Paris France

ISBN: (纸本)9531840822

This document provides an overview of the impact of NATs and Firewalls on Internet applications and then describes state-of-the-art solutions and current research initiatives that allow applications to work in the presence of NATs and Firewalls. Firewalls and Network Address Translators are inevitable in modern Internet as they play a very important role in protecting and managing network resources but these middleboxes are obstacles for multimedia traffic that use dynamic ephemeral ports. There is a need for a signaling protocol, which can request a change of policy rules in a firewall or creation of a binding in the NAT. To develop a protocol or to design a network architecture, it is necessary to understand the implication of middleboxes such as NATs and Firewalls with respect to the deployment of services like Voice over ip. Different solutions for middlebox traversal have been developed over the past years with different constraints and limitations. This document compares these approaches against common criteria.

关键词： Computer system firewalls

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