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Error detection in a signal field of a WLAN frame header

  • US 10,432,760 B1
  • Filed: 11/10/2017
  • Issued: 10/01/2019
  • Est. Priority Date: 04/12/2010
  • Status: Active Grant
First Claim
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1. A method for generating physical layer (PHY) data units corresponding to a first communication protocol for transmission in a wireless network, the method comprising:

  • generating, at a network interface of a wireless network device, the network interface implemented on one or more integrated circuits, a cyclic redundancy check (CRC) sequence using information bits of a signal field, defined by the first communication protocol, of a PHY preamble of a PHY data unit, wherein generating the CRC sequence includes generating the CRC sequence using a CRC polynomial defined by a second communication protocol for a legacy signal field defined by the second communication protocol, wherein the second communication protocol is a legacy protocol with respect to the first communication protocol, and wherein a size of the legacy signal field is smaller than a size of the signal field defined by the first communication protocol;

    generating, at the network interface of the wireless network device, a CRC field to be included in the signal field, including generating the CRC field to include a portion of the CRC sequence;

    generating, at the network interface of the wireless network device, the PHY data unit to include the PHY preamble, the PHY preamble having the signal field, the signal field having the information bits and the CRC field that includes the portion of the CRC sequence, the PHY data unit generated such that the signal field does not include the entire CRC sequence; and

    generating, at the network interface of the wireless network device, a transmission signal for transmission in the wireless network, the transmission signal corresponding to the PHY data unit.

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