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MIMO channel feedback protocols

  • US 7,542,454 B2
  • Filed: 01/21/2005
  • Issued: 06/02/2009
  • Est. Priority Date: 01/21/2005
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • receiving a first wireless frame from a first wireless entity at a second wireless entity through a multiple input, multiple output (MIMO) channel, said first wireless frame including channel training data;

    determining channel information for said MIMO channel using said channel training data;

    determining a data rate for said first wireless entity to use to transmit user data to said second wireless entity in a subsequent data frame based on said channel information;

    determining, based on said data rate, a network allocation vector (NAV) to indicate a time period during which a wireless medium is to be reserved to accommodate transmission of said subsequent data frame of said first wireless entity; and

    transmitting a second wireless frame from said second wireless entity to said first wireless entity, said second wireless frame including said NAV.

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