[Object] To enable providing a wireless access technology in a more preferred aspect irrespective of a difference in design in accordance with a use case in a communication system in which the base station device communicates with the terminal device.
[Solution] A terminal device includes: a communication unit configured to perform wireless communication; and a control unit configured to perform control such that control information regarding a supported communication scheme is transmitted to an external device through the wireless communication. In a case in which a first communication scheme and a second communication scheme different from the first communication scheme are supported, the control unit associates, with the control information, a parameter indicating whether or not dual connectivity based on the first communication scheme and the second communication scheme is supported.