CRC

A four-bit check over the HE-SIG-A contents.

Reading a capture

A real improvement on the non-HT SIGNAL field, which had only a single parity bit. Corrupt signalling can now be detected rather than acted on.

Where it sits

HE-SIG-A › HE-SIG-A2 › CRC

Authored in HE SU PPDU . Drawn in 21 frames.

• Ack
• TCP over IPv4, in a protected QoS Data frame, aggregated
• Association Request
• Association Response
• Beacon
• Compressed Block Ack
• CTS
• Four-way handshake message 1
• Four-way handshake message 2
• Four-way handshake message 3
• Four-way handshake message 4
• Probe Request
• Probe Response
• ARP request in a QoS Data frame
• ICMP echo over IPv4, in a QoS Data frame
• UDP over IPv6, in a QoS Data frame
• TCP over IPv4, in a protected QoS Data frame
• TCP over IPv4, in an open QoS Data frame
• UDP over IPv4, in a QoS Data frame
• RTS
• Trigger frame

Accuracy

Clause

802.11-2024 §27.3.11.6

Verified

Not verified against the standard. Treat this as a claim, not a fact.