| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a radio control unit of in-vehicle equipment, which can perform proper control depending on a position of a portable machine with respect to a vehicle, even if transmission request signals are simultaneously transmitted from a plurality of transmission antennae. <P>SOLUTION: When a lock switch arranged in a door of the door is push-operated, the transmission request signals are simultaneously transmitted from a transmission antenna for the outside of the vehicle, which makes the vicinity of the door serve as a transmission area, and a transmission antenna for the inside of the vehicle, which makes the interior of the vehicle serve as a transmission area (S110). When it is determined that a response signal from the portable machine is not received (S130: NO and S150: NO), the transmission request signals are output while the outputs of the transmission request signals from the transmission antenna for the outside of the vehicle and transmission antenna for the inside of the vehicle are alternately decreased (S170-S210). <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
