Device

A terminal device comprising:

• circuitry including at least a processor and a memory, the circuitry configured to:
• recognize that the terminal device is a device candidate for performing wireless communication of a cellular system using a frequency band shared between the wireless communication of the cellular system and wireless communication conforming to a wireless local area network (LAN) standard through a notification by a base station of the cellular system;
• perform control for using the frequency band in the wireless communication of the cellular system when the terminal device is the device candidate;
• and
• perform carrier sensing for the frequency band and report a result of the carrier sensing to the base station,
• wherein the base station determines whether or not to use the frequency band based on the result from the terminal device and performs carrier sensing for the frequency band and transmits a request-to-send (RTS) frame to the terminal device when a period, in which no signal is transmitted using the frequency band, becomes a sum of inter-frame space (DTFS) and a back-off time.