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A CORBA Based QOS Support for Distributed Multimedia Applications

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Abstract

Advance object oriented computing platform such as the Common Object Request Broker Architecture (CORBA) provides a conducive and standardized framework for the development of distributed applications. Most of the off-the-shelf CORBA are implemented over legacy network transports and distributed processing platforms such as TCP/IP and RPC. They are not suitable for real-time applications due to their high processing overheads, and lack of features and mechanisms in supporting quality of service both at the network level and at the end-host level. To overcome this limitation we have designed and implemented a CORBA-based Real Time Stream Service (RTSS) that allows real-time streams to be managed through the ‘CORBA channel’ but by-passing the heavy CORBA protocol stacks. RTSS aims to achieve an integrated QOS framework that incorporates both host scheduling and end-to-end network-level QOS to better support the processing of distributed multimedia applications over ATM networks. For host scheduling, a novel scheme of frequency-based scheduling mechanism has been proposed to cope with dynamic CPU load condition. The scheme has been implemented for a stand-alone host and will be extended to the networked environment. At the network-level QOS, RTSS provides object-oriented application programming interfaces (APIs) which guarantee end-to-end QOS when operating directly over ATM adaptation layers. The benefits of RTSS for the development of real-time multimedia distributed applications are demonstrated through a number of experiments.

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Authors and Affiliations

  1. National University of Singapore, Lower Kent Ridge Road, 119260, Singapore

    Hung Keng Pung

  2. National University of Singapore, Lower Kent Ridge Road, 119260, Singapore

    Wynne Hsu

  3. National University of Singapore, Lower Kent Ridge Road, 119260, Singapore

    B.S. Sapkota

  4. National University of Singapore, Lower Kent Ridge Road, 119260, Singapore

    W.C. Wong

Authors
  1. Hung Keng Pung
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  2. Wynne Hsu
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  3. B.S. Sapkota
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  4. W.C. Wong
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Pung, H.K., Hsu, W., Sapkota, B. et al. A CORBA Based QOS Support for Distributed Multimedia Applications. Multimedia Tools and Applications 12, 209–233 (2000). https://doi.org/10.1023/A:1009671708555

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