Patent ID: 8467374

Claim:
A communication device comprising: a first communicating unit that performs wireless communication with an external device on a first carrier wave at a first frequency; a second communicating unit that has a plurality of antennas, and that performs the wireless communication with the external device on a second carrier wave at a second frequency, wherein a directionality of the second carrier wave is stronger than a directionality of the first carrier, and wherein the second carrier wave causes a larger propagation loss than the first carrier wave causes; a first communication processing unit that processes a signal received by the first communicating unit, and that allows the first communicating unit to transmit a signal; and a second communication processing unit that processes a signal received by the second communicating unit, and that allows the second communicating unit to transmit a signal, wherein the second communication processing unit includes an adjusting unit that adjusts a signal to be transmitted from each of the plurality of antennas based on an adjustment factor for the each of the plurality of antennas, the adjustment factor derived by a loop back transfer function among the plurality of antennas, a transmission beam pattern candidate setting unit that derives at least one transmission beam pattern for defining a beam directionality of the signal to be transmitted based on a first transmission request received by the first communicating unit and a second transmission request received by the second communicating unit, and that sets the derived at least one transmission beam pattern as at least one transmission beam pattern candidate to be applied to the signal to be transmitted, and a beam pattern applying unit that applies any of the set at least one transmission beam pattern candidate based on first requested-beam-pattern identification information transferred from the first communication processing unit, the first requested-beam-pattern identification information specifying a beam pattern of which transmission is requested by the external device.