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Telecommunications, 2003. ConTEL 2003. Proceedings of the 7th International Conference on

Date 11-13 June 2003

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  • Proceedings of the 7th International Conference on Telecommunications ConTEL 2003 [front matter]

    Publication Year: 2003, Page(s):i - xvi
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    Freely Available from IEEE
  • Modeling of optical link using finite-difference method

    Publication Year: 2003, Page(s):383 - 388 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    Propagation of optical pulses in nonlinear dispersive lossy fiber is numerically analyzed using finite-difference method. Nonlinear Schrodinger equation is solved using split-step method and Crank-Nicholson finite-difference scheme. Polarization mode dispersion model, based on coupled nonlinear Schrodinger equations, is included into calculations. The models of erbium doped fiber amplifiers in tim... View full abstract»

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  • Benes configurations of circuit in node with space cross connections for transparent optical networks

    Publication Year: 2003, Page(s):389 - 393 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    There is a consideration of the transparent optical network with space cross connections in nodes realized with Benes configuration of circuit. The equations for the Benes configuration are recalculated and improved for relations among number of entrances and exits in circuit N and number of direct symmetric two channel couplers C, number of voltage electrode circuits V, characteristic of attenuat... View full abstract»

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  • Atmospheric effects on optical wireless links

    Publication Year: 2003, Page(s):395 - 401 vol.2
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (558 KB)

    The optical coherent wave propagation is affected by the atmosphere in many ways. Several theoretical models for propagation of light through the atmosphere are well known. To predict link availability in different climate zones it is necessary to do field tests for data acquisition. Therefore reliability- and availability-tests on free space optics (FSO)-systems have been done at the Department o... View full abstract»

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  • Performance analysis of first-fit wavelength assignment algorithm in optical networks

    Publication Year: 2003, Page(s):403 - 409 vol.2
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (423 KB)

    This paper proposes a new analytical technique for the performance analysis of all optical networks which use the first-fit algorithm for wavelength assignment. We analyze the wavelength usage on the links to calculate the blocking probability of a source destination pair, taking into account wavelength correlation and load correlation between links. Our model is accurate even in a system with lar... View full abstract»

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  • Wavelength assignment in GMPLS networks with multiclass service

    Publication Year: 2003, Page(s):411 - 418 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (342 KB)

    In generalized multiprotocol label switching (GMPLS) networks, the routing and wavelength assignment (RWA) problem is important to realize the quality of service (QoS). In this paper, we put forward the blocking probability model with sparse wavelength conversion. As for the wavelength assignment subproblem, we formulate it as a Markov decision process (MDP) in order to realize the multiclass serv... View full abstract»

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  • A multicast reinforcement learning algorithm for WDM optical networks

    Publication Year: 2003, Page(s):419 - 426 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (594 KB)

    The popularity of multimedia applications has resulted in increased interest in efficient implementation of multicasting. Wavelength division multiplexing (WDM) is a promising technology for backbone networks, because they provide high bandwidth and methods for control and management. Since not every switches are equipped with wavelength conversion facility, it is a really important issue to desig... View full abstract»

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  • IP based optical control plane

    Publication Year: 2003, Page(s):427 - 433 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The exponential growth in demand for Internet service is reshaping telecom industry and driving the model for next generation infrastructure towards converged, multiservice network with IP-over-glass at its heart. Current vision of the Internet transport network is a model with routers, switches, optical crossconnects (OXCs), DWDM optical line systems (OLSs), and add-drop multiplexers (ADMs) that ... View full abstract»

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  • Generalized MPLS - an overview

    Publication Year: 2003, Page(s):435 - 442 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (543 KB)

    GMPLS, being developed by IETF and OIF, has been proposed to address traffic engineering to a variety of networking technology, and to serve in a variety of network signaling layers, extending capabilities beyond those networks that are only packet-based. GMPLS is an extension of MPLS and it provides a control plane for devices that switch in the time, packet, wavelength, and fiber domains. This c... View full abstract»

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  • The application of Steiner trees to delay constrained multicast routing: a tabu search approach

    Publication Year: 2003, Page(s):443 - 448 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (474 KB)

    With today's development of information technology comes the increased development of numerous real-time multimedia network applications. Some examples include video and teleconferencing, telemedicine, video-on-demand, distance education, applications in finance, etc. Several of these applications require multicasting with a certain quality of service (QoS). One of the most important QoS parameter... View full abstract»

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  • Applications of service curve theory

    Publication Year: 2003, Page(s):449 - 453 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    In this paper, we study well-known utilization-based admission control schemes which are derived by ad-hoc mathematical manipulations in previous literatures. We show that the same results can easily be achieved by using service curve theory (SCT). We also investigate the problem of providing statistical quality of service (QoS) in wireless network. With the same idea as the service curve theory, ... View full abstract»

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  • On the quality and performance of active networking based media transcoding in multicast sessions

    Publication Year: 2003, Page(s):455 - 462 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    In this paper an advanced network service is described, which enables customisation of data services and adds extra flexibility to the network's data transporting capabilities. More specifically, a multicast service providing media transcoding inside the network is detailed. Whereas in traditional multicast services only one specific version of the data is available, in this service customers can ... View full abstract»

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  • Network resource management for the services with variable QoS requirements

    Publication Year: 2003, Page(s):463 - 467 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (358 KB)

    A development of recent complex and demanding applications continuously increases the requirements on a quality of the service, provided by communication's infrastructure. The variable QoS requirements could become from variable demands of an user and an application and from the variable network characteristics, respectively. It is very possible that the same complex applications and the services ... View full abstract»

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  • CDMA2000 for a satellite environment

    Publication Year: 2003, Page(s):469 - 473 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB)

    CDMA2000 is the American telecommunication standard for 3G. It is a wideband spread spectrum radio interface designed to provide high data rates and multimedia services to the wireless user. It has two modes of operation, 1X (DS-CDMA) and 3X (MC-CDMA). In this paper, we compare the forward link performance of the two modes for a satellite environment. In order to focus our comparison on the transm... View full abstract»

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  • Quality of service management in IP networks

    Publication Year: 2003, Page(s):475 - 481 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (545 KB)

    The DiffServ architecture provides a scalable mechanism for QoS introduction in an IP network. The idea of DiffServ is based on the aggregation of traffic flows at an ingress (or egress) point of a network and IP packet marking for different priority flows, according to several classification criteria. In this paper the problem of the improvement and fairness of absolute QoS provisioning to paths ... View full abstract»

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  • Proportional delay differentiation employing the CBQ service discipline

    Publication Year: 2003, Page(s):483 - 489 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The DiffServ architecture provides a scalable mechanism for QoS introduction in a TCP/IP network. The idea of DiffServ is based on the aggregation of traffic flows at an ingress (or egress) point of a network and the IP packet marking for different priority flows, according to several classification criteria. Two approaches exist in the DiffServ architecture: the absolute and the relative. In abso... View full abstract»

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  • BFC heuristic approach for constraint-based path selection in QoS routing

    Publication Year: 2003, Page(s):491 - 496 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (390 KB)

    In DiffServ networks QoS-based routing for only one QoS measure (e.g. constrained bandwidth) is known as the restricted shortest path (RSP) problem. It can be treated as the minimum cost network flow problem in the multicommodity single source multiple destination network. For constrained-based path selection in QoS routing with N quality of service levels in function to serve predicted traffic de... View full abstract»

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  • Improving quality of service in cellular IP domains

    Publication Year: 2003, Page(s):497 - 504 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (641 KB)

    In today's networks there is a convergence to an integrated IP-based network. lETF's mobile IP handles global macromobility in the IP based infocommunication networks. It is, however, not adapted to micromobility environment; in this local mobility management there are several proposals both for IPv4 and IPv6. These approaches use local entities to support mobility in a well-defined area (domain),... View full abstract»

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  • Measurement and analysis of users' perception of QoS for IP telephony service

    Publication Year: 2003, Page(s):505 - 512 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (537 KB)

    Along with a technological evolution of the Internet that enables providers to offer ever-higher access speeds, applications' demands for the quality of service (QoS) are growing as well. Services like IP telephony are highly dependent on the quality of the transport services as well as the application QoS-awareness. Users' acceptability of the service and their willingness to pay is depending on ... View full abstract»

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  • Dynamic and XML-based river navigation maps for the Web

    Publication Year: 2003, Page(s):513 - 520 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (614 KB)

    In this paper, an efficient generation of river navigation maps based on user input on the Web is described. XML-based approach can provide concepts and solutions to significantly improve the overall quality of the Web application relating to map maintenance, performance and usability problems. Therefore, dynamic map generation capabilities of the chosen Internet GIS are analyzed in order to optim... View full abstract»

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  • Building enterprise information system using model driven architecture on J2EE platform

    Publication Year: 2003, Page(s):521 - 526 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (466 KB)

    Enterprise information systems can be very complex since they provide interoperability for geographically distributed facilities and other business units with distinct business functions and mutual dependencies. Building a system of that complexity is not just a programming effort but almost a multidisciplinary approach to software engineering process. The OMG's model driven architecture (MDA) is ... View full abstract»

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  • Telematic requirements for a mobile and wireless healthcare system derived from enterprise models

    Publication Year: 2003, Page(s):527 - 534 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (602 KB)

    A challenge of current innovation in healthcare processes is to improve the time to treatment. This paper addresses the benefits of telematic services and mobile & wireless devices such as vital sign sensors and head mounted cameras for healthcare processes. It explores the telematic requirements for a distributed healthcare environment of body area networks of the mobile devices which are connect... View full abstract»

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  • Automating conceptual design of Web warehouses

    Publication Year: 2003, Page(s):535 - 542 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (547 KB)

    Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semistructured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semiautomated methodology for conceptual design of web warehouses from XML sources mo... View full abstract»

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  • Modeling ebXML registry service architecture

    Publication Year: 2003, Page(s):543 - 550 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (446 KB)

    Department of Telecommunications, Faculty of Electrical Engineering and Computing, University of Zagreb works on the research project named "networked economy", supported by Croatian Ministry of Science and Technology. The project is also recognized by corporate domain and was made a part of an e-business initiative by the Agrokor group. The Agrokor's intention is to use the ebXML registry/reposit... View full abstract»

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  • Implementation of the ebXML registry client for the ebXML registry services

    Publication Year: 2003, Page(s):551 - 556 vol.2
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (402 KB)

    The implementation of the ebXML registry services is a part of a research project at the University of Zagreb, aimed at defining a strategy for the adoption of e-business in Croatia. Implementing the ebXML registry/repository is a vital step as it implements a standard mechanism for registering, storing and retrieving data about business partners relevant for conducting e-business. This paper desc... View full abstract»

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