A method and apparatus for interacting with a communications system. Interaction with the communications system occurs by identifying an access point. An estimate of link-loss from a mobile node to the access point is then determined. Also determined is an allowable power density limit proximate to the access point. A communications signal that is suitable for interacting with the communications system is generated. The level of the communications signal is adjusted according to the estimated link-loss and also according to the allowable power density limit. The level adjusted signal is then directed to the access point.