Patent ID: 8171149

Claim:
A communication system in which a first terminal device and a second terminal device are connected via a wireless communication network and perform point-to-point communications with each other, wherein each of the first and second terminal devices comprises an interface unit accessing a memory-card-type recording medium detachably mounted to the interface unit, wherein information needed for one of the first and second terminal devices to communicate with the other terminal device is transferred between the first terminal device and the second terminal device using the recording medium, wherein the first terminal device is configured to store, into the recording medium mounted to the first terminal device, first identification information for identifying the first terminal device and being notified to the second terminal device, wherein the second terminal device is configured to read, when mounting of the recording medium to the second terminal device is detected after the recording medium is taken out from the first terminal device, the first identification information from the recording medium into the second terminal device, and is configured to store, into the recording medium mounted to the second terminal device, second identification information for identifying the second terminal device and being notified to the first terminal device, and wherein the first terminal device is configured to read, when mounting of the recording medium to the first terminal device is detected after the recording medium is taken out from the second terminal device, the second identification information from the recording medium into the first terminal device.