Patent ID: 8284684

Claim:
A communication device, serving as a primary station which carries out communication with a secondary station, comprising: a first protocol control section for, without transmitting a station-search command to confirm a presence of the secondary station so as to establish a communication connection between the communication device and the secondary station, transmitting a first connection request command including upper layer data, so that a communication connection between the communication device and the secondary station is established; a second protocol control section for transmitting a station-search command to confirm a presence of the secondary station and then transmitting a second connection request command, so that a communication connection between the communication device and the secondary section is established; and a protocol switching section for causing the second protocol control section to transmit the station-search command so as to establish a communication connection with a communication device which does not support a first protocol but supports a second protocol, when the first protocol control section transmits the first connection request command and then does not receive a connection response to the first connection request command from the secondary station within a predetermined time.