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System and apparatus for performing broadcast and localcast communications

  • US 7,653,363 B2
  • Filed: 11/13/2003
  • Issued: 01/26/2010
  • Est. Priority Date: 07/03/2001
  • Status: Expired due to Fees
First Claim
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1. A localcast transmitter, comprising:

  • a first interface;

    a first encoder coupled to said first interface through a second encoder;

    a packet assembler coupled to said first encoder and to the first interface through the second encoder such that the packet assembler receives input from the first encoder when transmitting at a first transmission speed and the packet assembler receives input from the first interface through the second encoder when transmitting at a second transmission speed, such that first encoder is bypassed when transmitting at the second transmission speed;

    wherein the packet assembler interleaves a first portion of the input received and a second portion of the input received over a broadcast frame that includes sub frames;

    wherein the first portion is for transmission at a first latency and the second portion is for transmission at a second latency, the second latency being lower than the first latency; and

    wherein each sub frame includes data associated with the first portion and data associated with the second portion that are interleaved together;

    a control function coupled to said first interface, said encoder and said packet assembler;

    a modulator, coupled to the packet assembler, that comprises a localcast mode; and

    an antenna coupled to the modulator.

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