Sharing multicast videos using patching streams

    Authors

    Y. Cai;K. A. Hua

    Comments

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    Abbreviated Journal Title

    Multimed. Tools Appl.

    Keywords

    multimedia communications; multicast; patching; video on demand; service; latency; performance study; SERVER; Computer Science, Information Systems; Computer Science, Software; Engineering; Computer Science, Theory & Methods; Engineering, Electrical; & Electronic

    Abstract

    The access patterns of most information systems follow the 80/20 rules. That is, 80% of the requests are for 20% of the data. A video server can take advantage of this property by waiting for requests and serving them together in one multicast. This simple strategy, however, incurs service delay. We address this drawback in this paper by allowing clients to receive the leading portion of a video on demand, and the rest of the video from an ongoing multicast. Since clients do not have to wait for the next multicast, the service latency is essentially zero. Furthermore, since most services require the server to deliver only a small leading portion of the video, the server can serve many more clients per time unit. We analyze the performance of this approach, and determine the optimal condition for when to use this strategy. We compare its performance to a hardware solution called Piggybacking. The results indicate that more than 200% improvement is achievable.

    Journal Title

    Multimedia Tools and Applications

    Volume

    46

    Issue/Number

    2

    Publication Date

    1-1-2003

    Document Type

    Article

    Language

    English

    First Page

    125

    Last Page

    146

    WOS Identifier

    WOS:000182886800007

    ISSN

    1380-7501

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