Siemens IEEE802.11 - Manual (Page 39)

WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt Page 39 © Siemens, 2002
Frame
Control Duration
ID
Addr 1 Addr 2 Addr 3 Addr 4
6HTXHQFH
&RQWURO
CRC
Frame
Body
2 2 6 6 6 6 2 0-2312 4
802.11 MAC Header
Bytes:
Protocol
Version
Type SubType
To
DS
Retry
Pwr
Mgt
More
Data
WEP Rsvd
Bits: 2 2 4 1 1 1 1 1 1 1 1
DS
From More
Frag
Frame Formats
n
MAC Header format differs per Type:
– Control Frames (several fields are omitted)
– Management Frames
– Data Frames
n
Includes Sequence Control Field for filtering of duplicate caused by
ACK mechanism.