Disclosed is a communication apparatus comprising: a receiver configured to: receive, from a base station, a radio resource control (RRC) signaling including information for configuring each of an identifier of a first timing advance group and an identifier of a second timing advance group, and information for configuring an identifier corresponding to the identifier of the second timing advance group, and receive, from the base station, the identifier corresponding to the identifier of the second timing advance group and a timing advance command; and a controller configured to control an amount of timing adjustment for an uplink transmission corresponding to the second timing advance group on a basis of the identifier corresponding to the identifier of the second timing advance group and the timing advance command.