VHT-SIG-A1

Bandwidth, group and stream configuration.

Subfields

• BW — Channel width — 20, 40, 80 or 160 MHz.
• STBC — Space-time block coding in use.
• Group ID — Identifies which set of stations a multi-user transmission is addressed to.
• NSTS / Partial AID — Stream counts in a multi-user frame; a shortened association identifier in a single-user one.

Where it sits

VHT-SIG-A › VHT-SIG-A1

Authored in VHT 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 §21.3.8.3.3

Verified

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