FIELD: wireless communication.
SUBSTANCE: group of inventions relates to the wireless communication technology. A communication device contains: a reception circuit that receives a frame of a beacon DMG radio signal including an intersectional scan field (SSW) containing a differential gain subfield to indicate the difference between the value obtained using enhancing a partner reception antenna by PCP/AP communication, and the value of transmission of equivalent isotropic radiated power (TX EIRP) of the partner by PCP/AP communication; a determination circuit that determines, whether a frame used for beam-forming training (hereinafter – BFT) should be transmitted, using the value of the differential gain field; and a transmission circuit that transmits the frame used for BFT, if the determination circuit determined that the frame used for BFT should be transmitted.
EFFECT: decrease in electricity consumption and reduction in interference level.
8 cl, 45 dwg
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