Patent ID: 8032077

Claim:
A sink-side wireless communication device being wiredly connectable with a sink-side wired communication device and wirelessly communicable with a source-side wireless communication device that is wiredly connectable with a source-side wired communication device, the sink-side wireless communication device comprising: a memory; a cable port; a read module configured to read display device identification information from an external device that is connected to the cable port through a cable, the display device identification information being compatible with a communication method using the cable; a determination module configured to determine whether the external device is the source-side wireless communication device or not based on the acquired display device identification information; a wired physical address processing module configured to determine, if the determination module determines that the external device is not the source-side wireless communication device, that the external device is the sink-side wired communication device and to then calculate a physical address of the source-side wired communication device based on a physical address included in the display device identification information; an authentication module configured to perform, if the determination module determines that the external device is the source-side wireless communication device, an authentication process with the source-side wireless communication device being wiredly connected to the sink-side wireless communication device and to then store authentication information acquired through the authentication process; and a wireless communication module configured to perform a wireless communication with the source side wireless communication device that is wiredly connected with the source-side wired communication device, in a state where the sink-side wired communication device is wiredly connected to the cable port, based on the stored authentication information.