Unauthorized carrier wave occupation duration management method and device

The invention provides an unauthorized carrier wave occupation duration management method and device. The method comprises steps that a station executes clear channel assessment CCA and/or expanded clear channel assessment eCCA; and that the station determines the end position of occupation duration according to a subframe of successfully executing CCA/eCCA or an orthogonal frequency-division multiplexing (OFDM) sign position or subframe position in a scheduling unit.