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System and apparatus for performing broadcast and localcast communications

  • US 7,349,691 B2
  • Filed: 10/26/2001
  • Issued: 03/25/2008
  • Est. Priority Date: 07/03/2001
  • Status: Expired due to Fees
First Claim
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1. A system for performing wireless communications, comprising:

  • a broadcast transmission system configured to transmit broadcast information by employing wide-area FM subcarrier broadcasting on a predetermined schedule, wherein the broadcast information includes information for being conveyed to a user interface of a mobile device;

    a localcast transmission system configured to transmit local information over a local area, wherein the local area is smaller than the wide area;

    a peer-to-peer transmission system configured to transmit peer information; and

    a mobile device comprising a transceiver that is configured to;

    receive the broadcast information when the transceiver is in a broadcast mode and convey the broadcast information to the user interface of the mobile device;

    receive the localcast information when the transceiver is in a localcast mode and convey the localcast information to the user interface of the mobile device;

    transmit localcast information when the transceiver is in a localcast mode;

    receive peer information when the transceiver is in a peer-to-peer mode and convey the peer information to the user interface of the mobile device;

    transmit peer information when the transceiver is in a peer-to-peer mode;

    transmit from a signal processing unit receive commands that describe a receive frequency, antenna tuning parameters, and a duration of capture time; and

    adjust a variable tuning element to tune the antenna assembly in response to the receive commands.

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