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Transmission channel selection method

  • US 7,149,519 B2
  • Filed: 02/18/2004
  • Issued: 12/12/2006
  • Est. Priority Date: 02/24/2003
  • Status: Active Grant
First Claim
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1. A method for selecting an operating channel by a wireless device comprising the steps of:

  • scanning a plurality of radio frequency channels during a scan interval;

    monitoring each of the plurality of radio frequency channels during the scan interval for indication of utilization of ones of the channels;

    maintaining a channel map having an entry for each of the plurality of radio frequency channels, and if one or more messages was received on a channel, the corresponding entry further including a device ID for at least one of the devices that sent a message on the channel;

    selecting a channel from the channel map based at least in-part on whether an indication of utilization of the selected channel was detected;

    transmitting, on the selected channel during a claim interval, at least one message indicative of an intent to utilize the selected channel;

    monitoring, on the selected channel during the claim interval, for a message from another device indicative of an intent to utilize the selected channel; and

    ascertaining whether the wireless device should commence communications with other devices on the selected channel based upon characteristics of any messages received on the channel.

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