A probe apparatus for ultrasound diagnostic imaging, the probe apparatus comprising: an ultrasound transducer, which is arranged to generate at least an echo signal; a frame generation unit, which is arranged to generate a data frame to include in the data frame the echo signal received from the ultrasound transducer; a wireless communication unit, which is arranged to transmit the data frame to an ultrasonic imaging apparatus over a signal channel, CHARACTERISED IN THAT the wireless communication unit is arranged to transmit the data frame to the ultrasonic imaging apparatus over the signal channel in a 60 GHz frequency band via a mmWave-based wireless network; and by a beacon monitoring unit, which receives a mmWave beacon of a PBSS Control Point "PCP" which includes first pairing information transmitted from a Personal Basic Service Set "PBSS" with which the probe apparatus is not associated, when a pairing request is received by pressing a pairing button of the probe; a peer determination unit, which detects an ultrasonic imaging apparatus which is to be paired with the probe apparatus by using the first pairing information included in the mmWave beacon; an association performing unit, which performs a procedure for associating the probe apparatus with a PBSS of the ultrasonic imaging apparatus by using a basic service set ID "BSSID" included in the mmWave beacon; and a pairing request unit, which transmits second pairing information to the PCP which transmits a mmWave beacon which includes the second pairing information to the ultrasonic imaging apparatus via the PBSS, wherein the first pairing information represents that the ultrasonic imaging apparatus has been requested by a user to perform pairing, and the second pairing information represents that the probe apparatus has been requested by the user to perform pairing. an ultrasound transducer, which is arranged to generate at least an echo signal; a frame generation unit, which is arranged to generate a data frame to include in the data frame the echo signal received from the ultrasound transducer; a wireless communication unit, which is arranged to transmit the data frame to an ultrasonic imaging apparatus over a signal channel, CHARACTERISED IN THAT the wireless communication unit is arranged to transmit the data frame to the ultrasonic imaging apparatus over the signal channel in a 60 GHz frequency band via a mmWave-based wireless network; and by a beacon monitoring unit, which receives a mmWave beacon of a PBSS Control Point "PCP" which includes first pairing information transmitted from a Personal Basic Service Set "PBSS" with which the probe apparatus is not associated, when a pairing request is received by pressing a pairing button of the probe; a peer determination unit, which detects an ultrasonic imaging apparatus which is to be paired with the probe apparatus by using the first pairing information included in the mmWave beacon; an association performing unit, which performs a procedure for associating the probe apparatus with a PBSS of the ultrasonic imaging apparatus by using a basic service set ID "BSSID" included in the mmWave beacon; and a pairing request unit, which transmits second pairing information to the PCP which transmits a mmWave beacon which includes the second pairing information to the ultrasonic imaging apparatus via the PBSS, wherein the first pairing information represents that the ultrasonic imaging apparatus has been requested by a user to perform pairing, and the second pairing information represents that the probe apparatus has been requested by the user to perform pairing.