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Grouping-based data transceiving method in wireless LAN system and apparatus for supporting same

  • US 9,456,456 B2
  • Filed: 11/26/2012
  • Issued: 09/27/2016
  • Est. Priority Date: 11/24/2011
  • Status: Active Grant
First Claim
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1. A method for accessing a channel in a wireless local area network system, the method performed by a station comprising:

  • receiving, from an access point, channel access information for restricting a channel access to a group of stations during a channel access period within a beacon interval;

    determining whether the station is allowed to access a channel during the channel access period based on the channel access information; and

    if it is determined that the station is allowed to access the channel, accessing the channel during the channel access period by contending with other stations to transmit a power save poll frame, by sending the power save poll frame to the access point, by receiving a data frame from the access point, and by transmitting an acknowledgement (ACK) message in response to the data frame to the access point,wherein the channel access information includesa group ID field indicating the group of stations that is allowed to access the channel during the channel access period,a channel access period start field indicating a start time of the channel access period, anda channel access period duration field indicating a duration of the channel access period.

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