Cts Frame Format; Ack Frame Format - Black Box LW0050A Manual

PRO 11 SERIES WIRELESS ETHERNET
E.11.2 CTS F
RAME
The CTS frame looks like this:
Octets:
The Receiver Address (RA) of the CTS frame is copied from the Transmitter
Address (TA) field of the immediately previous RTS frame to which the CTS is a
response.
The Duration value is the value obtained from the Duration field of the
immediately previous RTS frame, minus the time, in microseconds, required to
transmit the CTS frame and its SIFS interval.
E.11.3 ACK F
RAME
The ACK frame looks like this:
Octets:
The Receiver Address of the ACK frame is copied from the Address 2 field of the
immediately previous frame.
If the More Fragment bit was set to 0 in the Frame Control field of the previous
frame, the Duration value is set to 0; otherwise the Duration value is obtained from
the Duration field of the previous frame, minus the time, in microseconds,
required to transmit the ACK frame and its SIFS interval.
142
F
ORMAT
2 2
Frame
Duration
Control
MAC Header
Figure E-8. CTS Frame.
F
ORMAT
2
Frame
Duration
Control
Figure E-9. ACK Frame Format.
6
RA
2 6
RA
MAC Header
6 4
TA CRC
4
CRC