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CONTENT SET BASED DELTACASTING

  • US 20100179986A1
  • Filed: 01/12/2010
  • Published: 07/15/2010
  • Est. Priority Date: 01/13/2009
  • Status: Active Grant
First Claim
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1. A method for multicasting over a communications system having a communications path between a server side of the communications system and a plurality of clients, the communications path comprising a shared forward link over which bandwidth resources are shared during a multicast communication, the method comprising:

  • intercepting a data block at the server side of the communications system, the data block comprising a header portion and a content portion and being communicated as part of a content set over the communications path, the content set comprising a plurality of content objects and being identified by a content set identifier;

    associating the data block with the content set identifier;

    generating a fingerprint using byte-level information comprised by the content portion of the data block;

    determining whether to multicast the data block over the communications path according to the fingerprint; and

    when it is determined to multicast the data block;

    multicasting the data block over the communications path; and

    using the content set identifier to determine whether a client accepts the data block multicast over the communications path.

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