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802.11 Management, Control and Data frames

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Following is the general MAC header format for a 802.11n frame
 
 
Frame Control Field (2 Octets)
 
 
The Type and Subtype fields together define the type of frame
 
Type Value
(bits B3,B2)
Subtype Value
(bits B7,B6,B5,B4)
Type Description
Subtype Description
00
0000
Management
Association Request
00
0001
Management
Association Response
00
0010
Management
Re-Association Request
00
0011
Management
Re-Association Response
00
0100
Management
Probe Request
00
0101
Management
Probe Response
00
0110
Management
Timing Advertisement
00
0111
Management
Reserved
00
1000
Management
Beacon
00
1001
Management
ATIM
00
1010
Management
Disassociation
00
1011
Management
Authentication
00
1100
Management
Deauthentication
00
1101
Management
Action
00
1110
Management
Action No Ack
00
1111
Management
Reserved
01
0000-0110
Control
Reserved
01
0111
Control
Control Wrapper
01
1000
Control
Block Ack Request (BlockAckReq)
01
1001
Control
Block Ack (BlockAck)
01
1010
Control
PS-Poll
01
1011
Control
RTS
01
1100
Control
CTS
01
1101
Control
ACK
01
1110
Control
CF-End
01
1111
Control
CF-End + CF-Ack
10
0000
Data
Data
10
0001
Data
Data + CF-Ack
10
0010
Data
Data + CF-Poll
10
0011
Data
Data + CF-Ack + CF-Poll
10
0100
Data
Null (no data)
10
0101
Data
CF-Ack (no data)
10
0110
Data
CF-Poll (no data)
10
0111
Data
CF-Ack + CF-Poll (no data)
10
1000
Data
QoS Data
10
1001
Data
QoS Data + CF-Ack
10
1010
Data
QoS Data + CF-Poll
10
1011
Data
QoS Data + CF-Ack + CF-Poll
10
1100
Data
QoS Null (no data)
10
1101
Data
Reserved
10
1110
Data
QoS CF-Poll (no data)
10
1111
Data
QoS CF-Ack + CF-Poll (no data)
11
0000-1111
Reserved
Reserved
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