Patent ID: 7336958

Claim:
A data transmission path establishing method, wherein: a base station transmits detection signals to a plurality of radio devices; each of the radio devices which have received the detection signal transmits detection response signals each including an identifier that uniquely identifies the device and doubling as a response signal and a detection signal for another radio device; the base station which have received the detection response signal from a radio device recognizes the radio device as a radio device belonging to the station based on the identifier included in the detection response signal; a radio device which have received the detection response signal from another radio device belongs to the radio device that is the source of the detection response signal when the device does not belong to the base station or any other radio device, while when the radio device belongs to the base station or another radio device, the device transmits a link information signal indicating the identifier of the radio device that is the source of the detection response signal to the base station or the radio device to which the device belongs; and the radio device which have received the link information signal forwards the link information signal to the base station or a radio device to which the device belongs.