A communication device includes a transmitter portion, a receiver portion and a management portion. The transmitter portion transmits information into a channel. The receiver portion receives information from the channel. The management portion includes a request-to-send packet generating portion, a clear-to-send packet receiving portion, a threshold database, a comparator and a resolution packet generating portion. The threshold database stores a threshold value for the parameter of the channel and provides the threshold value to the comparator. The comparator compares the threshold value and the channel parameter information and generates an instruction signal based on the comparison. The resolution packet generating portion generates a resolution packet based on the instruction signal and provides the resolution packet to the transmitter portion.