nBasically CSMA/CA
nSense media before transmission, if free, transmit
nDefer:
–wait until
end of current transmission, plus fixed delay (WaveLAN InterFrame Space, WIFS) of 60 msec
–apply
random backoff procedure: pick number between 0 and 31 (antenna slot number S)
–each slot
corresponds to 23 ms
–wait S*23 ms, sense media again, if busy, double backoff range until we reach range 0-255
–drop packet
after 15 attempts
nIf station has more than one packet to send: wait WIFS plus backoff-period in range 0-15 (avoid monopolization)