Embodiments provide an information transmission method, a base station, and user equipment, so as to properly use a spectrum. The method includes generating a first notification message, where the first notification message is used to instruct user equipment in a user equipment set to detect a common control channel of a first cell in the first cell, and sending the first notification message to the user equipment in the user equipment set by using a second cell. The method also includes sending the common control channel to the user equipment in the user equipment set by using the first cell.