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APPENDIX E: IEEE 802.11 Technical Tutorial
Sequence Control
The Sequence Control Field is used to represent the order of different fragments
belonging to the same frame, and to recognize packet duplications. It consists of
two subfields, Fragment Number and Sequence Number, which define the frame
and the number of the fragment in the frame.
CRC
The CRC is a 32-bit field containing a 32-bit Cyclic Redundancy Check (CRC)
E.11 Most Common Frame Formats
E.11.1 RTS F
RAME
F
ORMAT
The RTS frame looks like this:
Figure E-7. RTS Frame Format.
The RA of the RTS frame is the address of the Station Adapter on the wireless
medium that is the intended immediate recipient of the next Data or Management
frame.
The TA is the address of the Station Adapter transmitting the RTS frame.
The Duration value is the time, in microseconds, required to transmit the next
Data or Management frame, plus one CTS frame, plus one ACK frame, plus three
SIFS intervals.
Frame
Control
Duration
RA
TA
CRC
2
MAC Header
Octets:
2
6
6
4
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