Patent ID: 6473627
Filing Date: 2002-10-29
Classification: H04B,H04W

Abstract:
A mobile communication system, comprising:a radio base station for transmitting and receiving the electromagnetic waves of a first radio communication system and the electromagnetic waves of a second radio communication system; and a communication terminal including: an antenna for transmitting and receiving the electromagnetic waves of said first radio communication system and the electromagnetic waves of said second radio communication system; a tracking unit for directing the orientation of said antenna to an arrival direction of the electromagnetic waves; a receiver for demodulating the electromagnetic waves of said first radio communication system and the electromagnetic waves of said second radio communication system which are received; a transmitter for modulating the contents to be transmitted into the electromagnetic waves of said first radio communication system and the electromagnetic waves of said second radio communication system; a handset for indicating predetermined information to an exterior of the communication terminal and receiving an instruction from the exterior; and a controller for controlling the above respective units and implementing an initial acquiring procedure from which a predetermined procedure is omitted when a predetermined condition is satisfied at the time of switching from said first radio communication system to said second radio communication system.