High-efficiency station (sta) and method for decoding an he-ppdu

A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of a communication station (STA) to configure the STA to perform operations to:

• process a legacy preamble of a high-efficiency (HE) packet protocol data unit (HE-PPDU), the legacy preamble comprising a legacy signal field (L-SIG) following legacy training fields, the L-SIG including at least a length field and a rate field;
• process a subsequent signal field following the L-SIG, wherein first and second OFDM symbols immediately following the L-SIG use BPSK modulation;
• determine whether the length field is divisible by three;
• and
• decode one or more subsequent fields following the subsequent signal field of the HE-PPDU based on a determination that the length field that is not divisible by three, the one or more subsequent fields including a high-efficiency signal field (HE-SIG-A).

A method performed by a communication station (STA) comprising:

• processing a legacy preamble of a high-efficiency (HE) packet protocol data unit (HE-PPDU), the legacy preamble comprising a legacy signal field (L-SIG) following legacy training fields, the L-SIG including at least a length field and a rate field;
• processing a subsequent signal field following the L-SIG, wherein first and second OFDM symbols immediately following the L-SIG use BPSK modulation;
• determining whether the length field is divisible by three;
• and
• decoding one or more subsequent fields following the subsequent signal field of the HE-PPDU based on a determination that the length field that is not divisible by three, the one or more subsequent fields including a high-efficiency signal field (HE-SIG-A).

An apparatus of access point (AP) arranged for communicating with a plurality of high-efficiency (HE) stations, the apparatus comprising transceiver circuitry and processing circuitry configured to:

• configure a HE packet protocol data unit (HE-PPDU) to include:
• a legacy preamble comprising a legacy signal field (L-SIG) following legacy training fields, the L-SIG including at least a length field and a rate field;
• a subsequent signal field following the L-SIG, wherein first and second OFDM symbols immediately following the L-SIG use BPSK modulation;
• and
• set a value for the length field that is not divisible by three for communicating with one or more of the HE stations, and
• transmit the HE-PPDU for receipt by one or more stations (STAs).