A wireless access point device that schedules packet transmission and reception by devices (access point and stations) in a wireless local area network detects the presence of periodic transmissions on a first carrier frequency, wherein one or more of the detected periodic transmissions will interfere with reception of a packet by at least one of the devices. A different one of the devices is identified such that the detected periodic transmissions will not interfere with reception of a packet by the different one of the devices. Packet transmission and reception are scheduled within the wireless local area network such that said different one of the devices is scheduled to receive a packet during an occurrence of the detected periodic transmissions.