Smart entry system

A smart entry system comprising a vehicle-side unit and a plurality of portable devices,

• the vehicle-side unit includes:
• an exterior transmitter configured to transmit a request signal to an exterior communication area provided at an outside of a vehicle;
• an interior transmitter configured to transmit a request signal to an interior communication area provided in a vehicle compartment of the vehicle;
• a receiver;
• a discrimination code storing portion;
• an operated portion attached to one of doors of the vehicle to be operated by a user for unlocking the one of the doors;
• a first unlock control portion;
• and
• a second unlock control portion,
• each of the plurality of portable devices having a discrimination code different from each other, each of the plurality of portable devices configured to transmit a response signal including an ID code in response to the request signal from the vehicle-side unit, wherein;
• when all of the doors are locked, the discrimination code storing portion controls the interior transmitter to transmit the request signal, and when the receiver receives the response signal from a first portable device of the plurality of portable devices and discrimination code storing portion receives the discrimination code of the first portable device through a communication with the first portable device, the discrimination code storing portion stores the discrimination code of the first portable device;
• when the vehicle is parked in a state where all of the doors are locked, the first unlock control portion controls the exterior transmitter to periodically-transmit the request signal, and when the receiver receives the response signal from a second portable device of the plurality of portable devices, the first unlock control portion receives the discrimination code of the second portable device through a communication with the second portable device, and the discrimination code of the second portable device corresponds to the discrimination code of the first portable device stored in the discrimination code storing portion, the first unlock control portion controls the exterior transmitter to stop periodically-transmitting the request signal;
• when the exterior transmitter periodically-transmits the request signal, the receiver receives the response signal from a third portable device of the plurality of portable devices, the ID code included in the response signal corresponds to an ID code previously registered in the vehicle-side unit, and a user having the third portable device operates the operated portion, the first unlock control portion unlocks the one of the doors;
• and
• when the exterior transmitter stops periodically-transmitting the request signal and the operated portion is operated, the second unlock control portion controls the exterior transmitter to transmit the request signal, and when the receiver receives the response signal from a fourth portable device of the plurality of portable devices, the second unlock control portion receives the discrimination code of the fourth portable device through a communication with the fourth portable device, the discrimination code of the fourth portable device is different from the discrimination code of the first portable device stored in the discrimination code storing portion, and the ID code included in the response signal corresponds to the ID code previously registered in the vehicle-side unit, the second unlock control portion unlocks the one of the doors.