A fast initial link setup communication device, comprising: a service processing module adapted for generating a beacon frame comprising a physical layer convergence protocol service data unit, wherein a physical frame header of the beacon frame comprises a first identifier information field and the physical layer convergence protocol service data unit of the beacon frame comprises a second identifier information field, and the values of the first identifier information field being first values and/or the values of the second identifier information field being second values indicate that the service processing module is adapted to support the fast initial link setup function, and is adapted for transmitting the beacon frame via a wireless transceiver module; and/or is adapted for receiving an initial link setup first message via the wireless transceiver module, wherein a physical frame header of the initial link setup first message comprises a first identifier information field and the physical layer convergence protocol service data unit of the initial link setup first message comprises a second identifier information field, and the values of the first identifier information field in the physical frame header of the initial link setup first message being the first values and/or the values of the second identifier information field in the physical layer convergence protocol service data unit of the initial link setup first message being the second values indicate that a terminal is adapted to the fast initial link setup function; the wireless transceiver module is adapted for exchanging data with the outside of said fast initial link setup communication device; the physical layer convergence protocol service data unit comprises a media access control protocol data unit, which is a media access control frame including a media access control frame header and a media access control frame body; the first identifier information field comprises one or more bits in a signal domain of the physical frame header of the beacon frame and/or the initial link setup first message; and the second identifier information field comprises one or more bits in the media access control frame of the beacon frame and/or the initial link setup first message; the second identifier information field comprises one or more bits in a capability information domain of the media access control frame body of the beacon frame and/or the initial link setup first message. a service processing module adapted for generating a beacon frame comprising a physical layer convergence protocol service data unit, wherein a physical frame header of the beacon frame comprises a first identifier information field and the physical layer convergence protocol service data unit of the beacon frame comprises a second identifier information field, and the values of the first identifier information field being first values and/or the values of the second identifier information field being second values indicate that the service processing module is adapted to support the fast initial link setup function, and is adapted for transmitting the beacon frame via a wireless transceiver module; and/or is adapted for receiving an initial link setup first message via the wireless transceiver module, wherein a physical frame header of the initial link setup first message comprises a first identifier information field and the physical layer convergence protocol service data unit of the initial link setup first message comprises a second identifier information field, and the values of the first identifier information field in the physical frame header of the initial link setup first message being the first values and/or the values of the second identifier information field in the physical layer convergence protocol service data unit of the initial link setup first message being the second values indicate that a terminal is adapted to the fast initial link setup function; the wireless transceiver module is adapted for exchanging data with the outside of said fast initial link setup communication device; the physical layer convergence protocol service data unit comprises a media access control protocol data unit, which is a media access control frame including a media access control frame header and a media access control frame body; the first identifier information field comprises one or more bits in a signal domain of the physical frame header of the beacon frame and/or the initial link setup first message; and the second identifier information field comprises one or more bits in the media access control frame of the beacon frame and/or the initial link setup first message; the second identifier information field comprises one or more bits in a capability information domain of the media access control frame body of the beacon frame and/or the initial link setup first message.