Patent attributes
A communication device performs a backoff procedure to determine when a first channel in a first radio frequency (RF) band is idle in connection with reserving an aggregate communication channel, which includes a first frequency portion in the first RF band and a second frequency portion in a second RF band, for a frame exchange. In response to determining that the first channel is idle, the communication device transmits a first packet that reserves at least the first channel for a first particular time duration. In connection with determining that the first channel is idle, the communication device performs one or more energy level measurements in a second channel in the second RF band to determine whether the second channel is idle. The communication device transmits a second packet that reserves at least the second channel for a second particular time duration in connection with reserving the aggregate communication channel.