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  • 1.
    Asplund, Katarina
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Implementation and Experimental Evaluation of aPartially Reliable Transport Protocol2004Licentiate thesis, monograph (Other academic)
    Abstract [en]

    In the last decade, we have seen an explosive growth in the deployment of multimedia applications on the Internet. However, the transport service provided over the Internet is not always feasible for these applications, since the network was originally designed for other types of applications. One way to better accommodate the service requirements of some of these applications is to provide a partially reliable transport service. A partially reliable transport service does not insist on recovering all, but just some of the packet losses, thus providing a lower transport delay than a reliable transport service. The work in this thesis focuses on the design, implementation, and evaluation of a partially reliable transport protocol called PRTP. PRTP has been designed as an extension to TCP in order to show that such a service could be effectively integrated with current protocol standards. An important feature of

    PRTP is that all modifications for PRTP are restricted to the receiver side, which means that it could be very easily deployed. The thesis presents performance results from various experiments on a Linux implementation of PRTP. The results suggest that transfer times can be decreased significantly when using PRTP as opposed to TCP in networks in which packet loss occurs. Furthermore, the thesis includes a study that investigates how users perceive an application that is based on a partially reliable service. Specifically, how users select the trade-off between image quality and latency when they download Web pages is explored. The results indicate that many of the users in the study could accept less than perfect image quality if the latency could be shortened.

  • 2.
    Asplund, Katarina
    et al.
    Karlstad University, Division for Information Technology.
    Brunstrom, Anna
    Karlstad University, Division for Information Technology.
    Partially Reliable Multimedia Transport2004Report (Other academic)
  • 3.
    Asplund, Katarina
    et al.
    Karlstad University, Division for Information Technology.
    Brunstrom, Anna
    The trade-off Between Latency and Image Quality: A User PerspectiveManuscript (preprint) (Other (popular science, discussion, etc.))
  • 4.
    Asplund, Katarina
    et al.
    Karlstad University, Division for Information Technology.
    Brunstrom, Anna
    Karlstad University, Division for Information Technology.
    Garcia, Johan
    Karlstad University, Division for Information Technology.
    Schneyer, Sean
    Karlstad University, Division for Information Technology.
    Grinnemo, Karl-Johan
    Karlstad University, Division for Information Technology.
    PRTP: A Partially Reliable Transport Protocol for Multimedia Applications: Background, Information and Analysis1999Report (Other academic)
  • 5.
    Asplund, Katarina
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Brunström, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    An Evaluation of User Web Service Requirements2002Conference paper (Refereed)
  • 6.
    Asplund, Katarina
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Brunström, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Partially Reliable Multimedia Transport2004Report (Other academic)
    Abstract [en]

    The ongoing deployment of applications that transmit multimedia data makes it important for the Internet to better accommodate the service requirements of this type of applications. One approach is to provide a partially reliable service, i.e. a service that does not insist on recovering all but only some of the packet losses, thus providing less delay than a reliable transport service. This technical report describes a transport protocol that provides a partially reliable service. The protocol, called PRTP, is especially aimed at applications with soft real-time requirements. The report also presents performance results from a number of different experiments investigating different aspects of PRTP. The results indicate that transfer times can be significantly decreased when using PRTP as opposed to TCP when packets are lost in the network.

  • 7.
    Asplund, Katarina
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Brunström, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    The QoS Trade-off Between Latency and Image Quality on the Web: A User Perspective2002Conference paper (Refereed)
  • 8.
    Asplund, Katarina
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Brunström, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    The Trade-off Between Latency and Image Quality on the Web: A User Perspective2003In: / [ed] John Sören Pettersson, 2003Chapter in book (Other academic)
  • 9.
    Asplund, Katarina
    et al.
    Karlstad University, Division for Information Technology.
    Garcia, Johan
    Brunstrom, Anna
    Schneyer, Sean
    Decreasing Transfer Delay Through Partial ReliabilityManuscript (preprint) (Other (popular science, discussion, etc.))
  • 10.
    Asplund, Katarina
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Garcia, Johan
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Brunström, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Schneyer, S.
    Decreasing Transfer Delay Through Partial Reliability2000Conference paper (Refereed)
  • 11.
    Brunström, Anna
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Asplund, Katarina
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Garcia, Johan
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Enhancing TCP Performance by Allowing Controlled Loss2000Conference paper (Refereed)
  • 12.
    Garcia, Johan
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Brunstrom, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Asplund, Katarina
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Application and Transport Layer Flexibility - A User-influenced Web Browsing SystemManuscript (preprint) (Other academic)
  • 13. Schneyer, S.
    et al.
    Garcia, Johan
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Brunström, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Asplund, Katarina
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    PRTP: A Partially Reliable Transport Protocol for Multimedia Applications1999Conference paper (Refereed)
  • 14.
    Schneyer, Sean
    et al.
    Karlstad University, Division for Information Technology.
    Garcia, Johan
    Karlstad University, Division for Information Technology.
    Brunstrom, Anna
    Karlstad University, Division for Information Technology.
    Asplund, Katarina
    Karlstad University, Division for Information Technology.
    PRTP: A Partially Reliable Transport Protocol for Multimedia Applications1999In: Proceedings of ISIMADE, 1999Conference paper (Other academic)
1 - 14 of 14
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