An access point, AP, and a station, STA, communicate with each other, with the AP indicating to the STA either or both of a preamble detection, PD, channel and a signaling, SIG, content channel and with the STA being initially monitoring a primary frequency segment of a plurality of frequency segments in an operating bandwidth of the AP (1510). A downlink, DL, or triggered uplink, UL, communication is performed between the AP and the STA during a transmission opportunity, TXOP, such that: (i) during the TXOP, the STA monitors a preamble on the PD channel and decodes a SIG content on the SIG content channel (1520); and (ii) after an end of the TXOP, the STA switches to the primary frequency segment.