Disclosed are a device and method for a wireless communication system, and a spectrum management device. The device for a wireless communication system comprises at least one processing circuit configured to: generate, for at least one group of carriers on an unlicensed band, at least one group of channel detection parameters for a user equipment to detect whether a channel is idle, wherein the at least one group of carriers is obtained by grouping at least some of the carriers on the unlicensed band; generate carrier grouping information indicating grouping situations of the carriers; and generate an uplink scheduling grant for the at least one group of carriers.