Systems and techniques relating to wireless communications are described. A described technique includes monitoring a group of wireless channels for signals from one or more devices; identifying, within the group, one or more primary channels on which one or more signals are received from the one or more devices; and selecting, from the group of wireless channels, a primary channel for a wireless communication based on the one or more identified primary channels and an estimated traffic load associated with at least a portion of the group of wireless channels. The selecting can include using a first channel that is separate from the one or more identified primary channels as the selected primary channel when the estimated traffic load exceeds a threshold, and using a second channel from the one or more identified primary channels as the selected primary channel when the estimated traffic load does not exceed the threshold.