Interactive video distribution systems – Video distribution system with upstream communication – Having link to external network
Reexamination Certificate
2006-05-02
2006-05-02
Bui, Kieu-Oanh (Department: 2611)
Interactive video distribution systems
Video distribution system with upstream communication
Having link to external network
C725S116000, C725S118000, C725S120000, C725S121000
Reexamination Certificate
active
07039939
ABSTRACT:
Methods, apparatus, and computer-readable media are disclosed for creating a virtual lookahead upstream receiver in a single physical upstream receiver in a CMTS, thereby avoiding having to dedicate an upstream receiver strictly for lookahead capability. A lookahead receiver is used to determine whether a potential alternative frequency is better than the frequency presently being used. A physical upstream receiver is assigned to operate under a set of operational parameters associated with a logical lookahead receiver during a particular time slot. The logical receiver receives upstream data from a selected test modem using an alternative upstream frequency. It is then determined whether the alternative upstream frequency is preferable over the frequency presently being used. If so, the physical receiver is configured to operate normally under the set of operational parameters associated with the logical receiver. At this stage, all modems in a particular group, including the selected modem, hop over to the alternative frequency. The physical receiver can be divided into any number of logical receivers.
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Khaunte Sunil
Leano Chrisanto
Millet Mark E.
Beyer Weaver & Thomas LLP.
Bui Kieu-Oanh
Cisco Technology Inc.
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