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Physical layer frame format for WLAN

  • US 10,291,752 B2
  • Filed: 10/19/2017
  • Issued: 05/14/2019
  • Est. Priority Date: 10/25/2013
  • Status: Active Grant
First Claim
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1. A method for generating a physical layer (PHY) data unit that conforms to a first communication protocol, the method comprising:

  • generating, at a first communication device, a PHY preamble for the PHY data unit, including;

    generating a legacy portion of the PHY preamble to include a legacy signal field, wherein the legacy portion of the PHY preamble is decodable by one or more second communication devices that conform to a second communication protocol, but do not conform to the first communication protocol, to determine a duration of the PHY data unit based on the legacy portion of the PHY preamble, andincluding a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol; and

    generating, at the first communication device, the PHY data unit to include the PHY preamble and a PHY payload, the PHY data unit for transmission via a communication channel.

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