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Wireless broadcast protocol

  • US 8,091,005 B2
  • Filed: 11/20/2008
  • Issued: 01/03/2012
  • Est. Priority Date: 11/14/2003
  • Status: Expired due to Fees
First Claim
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1. In a keyboard-video-mouse (“

  • KVM”

    ) system in which a target computer may be wirelessly accessed by a plurality of remote stations, a method comprising the steps of,(A) by the target computer;

    (a1) obtaining a frame of video data;

    (a2) compressing in a video compressor at least some of the video data using a line fitting compression scheme to produce at least one sequence of absolute coded pixel segments and relative coded pixel segments which combine to represent the video data;

    (a3) transmitting packets for the frame;

    (a4) transmitting a query packet requesting at least some of said plurality of remote stations to provide a list of packets that need to be resent;

    (a5) obtaining from each of at least two of the remote stations, a list of one or more packets that need to be resent, wherein the list of packets from a particular remote station identifies packets missed by that particular remote station;

    (a6) removing duplicates from the lists of packets that need to be resent; and

    then (a7) resending at least some of the requested packets; and

    (B) by each of a plurality of the remote stations;

    (b1) receiving from the target computer broadcasted packets associated with the frame of video data;

    (b2) keeping a list of missed packets;

    (b3) upon receipt of the query packet from the target computer, sending to the target computer at least some entries from the list of missed packets; and

    (b4) receiving at least some resent packets rebroadcasted from the target computer including some entries from the list of missed packets and other non-duplicated entries from corresponding lists of missed packets from others of said plurality of the remote stations.

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