A method for improving fairness among devices accessing a radio bandwidth. The devices include a mobile device using the radio bandwidth to access a radio access system using a channel access protocol, wherein the channel access protocol is a collision avoidance-type channel access protocol configured for using a back-off time before transmitting a retransmission (e.g., CSMA). Information is determined from the radio bandwidth. The information is analyzed to determine an adjusted back-off time. The mobile device implements the adjusted back off time before transmitting the retransmission over the radio bandwidth.