Wireless communication device, wireless communication terminal, and wireless communication method

A wireless communication device comprising:

• a receiver configured to receive a first frame addressed to a first wireless communication device other than the wireless communication device;
• controlling circuitry configured to
• set a first transmission prohibition period for a first network in response to determining that a sender of the first frame belongs to the first network to which the wireless communication device belongs based on the first frame,
• set a second transmission prohibition period for a second network in response to determining that the sender belongs to the second network, the second network being a network overlapping with the first network,
• determine, when the receiver receives a second frame addressed to a second wireless communication device other than the wireless communication device during a carrier-sensing in a period during which the first transmission prohibition period is not set and the second transmission prohibition period is set, and when a reception level of the second frame is a first threshold or more, whether a sender network of the second frame is the first network or the second network based on the second frame, and
• compare, in response to determining that the sender network is the second network, the reception level of the second frame with a second threshold greater than the first threshold to determine whether a state of a wireless medium is an idle state or a busy state.