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DSRC listen mode for Wi-Fi using DSRC spectrum

  • US 9,503,839 B2
  • Filed: 05/23/2014
  • Issued: 11/22/2016
  • Est. Priority Date: 05/31/2013
  • Status: Active Grant
First Claim
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1. A method for detecting dedicated short range communications (DSRC) transmissions to determine whether to use at least a portion of the DSRC spectrum, comprising:

  • operating, by a multi-mode client device, outside of the DSRC spectrum using a first clock rate;

    switching to a second clock rate while operating outside of the DSRC spectrum to detect DSRC transmissions using the DSRC spectrum;

    determining an activity level in the DSRC spectrum;

    operating a first communication channel in at least a portion of the DSRC spectrum based at least in part on the activity level; and

    maintaining a second communication channel outside of the DSRC spectrum in conjunction with the first communication channel.

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