Sounding method

  • US 9,763,259 B2
  • Filed: 09/22/2015
  • Issued: 09/12/2017
  • Est. Priority Date: 09/23/2014
  • Status: Active Grant
First Claim
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1. A sounding method by a first receiving device, the method comprising:

  • receiving a null data packet announcement (NDPA) frame from a transmitting device;

    receiving a null data packet (NDP) frame from the transmitting device after receiving the NPDA frame; and

    transmitting to the transmitting device a feedback frame including subchannel information measured on a first subchannel after receiving the NDP frame, the first subchannel being a subchannel that is allocated to the first receiving device among a plurality of subchannels into which a predetermined band is divided,wherein transmitting the feedback frame includes;

    transmitting the feedback frame to the transmitting device while a second feedback frame including subchannel information measured on the second subchannel is transmitted to the transmitting device by a second receiving device, the second subchannel being a subchannel that is allocated to the second receiving device among the plurality of subchannels.

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