Smart welcome system of vehicle and controlling method thereof

A smart welcome system of a vehicle, the system comprising:

• a low-frequency antenna;
• a smart key;
• a vehicle body control device;
• an AVNT smart connection device;
• and
• a welcome speaker electrically connected with the AVNT smart connection device;
• wherein when the vehicle is in a locked state, the low-frequency antenna is configured to emit a low-frequency signal of a first power to search for the smart key in a first search area, and to emit a low-frequency signal of a second power to search for the smart key in a second search area;
• wherein the smart key is configured to emit a high-frequency signal to the vehicle body control device in response to receiving the low-frequency signal of the first power or the low-frequency signal of the second power from the low-frequency antenna;
• wherein the vehicle body control device is configured to determine that the smart key is in the first search area in response to first receiving the high-frequency signal from the smart key, to proceed with authentication for the smart key, to emit a wake-up signal to the AVNT smart connection device, and to control the low-frequency antenna to emit the low-frequency signal of the second power;
• wherein in response to again receiving the high-frequency signal from the authenticated smart key, the vehicle body control device is configured to determine that the authenticated smart key is in the second search area, to unfold a side mirror, and to emit a welcome sound output signal to the welcome speaker through the AVNT smart connection device;
• wherein in response to receiving the wake-up signal from the vehicle body control device, the AVNT smart connection device is configured to execute a booting program;
• and
• wherein in response to receiving the welcome sound output signal from the AVNT smart connection device, the welcome speaker is configured to output a welcome sound simultaneously with unfolding the side mirror by the vehicle body control device.

A vehicle operable using a smart key, the vehicle comprising:

• a vehicle body;
• a door coupled to a driver's side of the vehicle body, the door comprising a door handle;
• a side mirror disposed on the driver's side of the vehicle;
• a low-frequency antenna installed in the door handle;
• a vehicle body control device;
• an AVNT smart connection device;
• and
• a welcome speaker installed in the side mirror and electrically connected with the AVNT smart connection device;
• wherein when the vehicle is in a locked state, the low-frequency antenna is configured to emit a low-frequency signal of a first power to search for the smart key in a first search area, and to emit a low-frequency signal of a second power to search for the smart key in a second search area;
• wherein the smart key is configured to emit a high-frequency signal to the vehicle body control device in response to receiving the low-frequency signal of the first power or the low-frequency signal of the second power from the low-frequency antenna;
• wherein the vehicle body control device is configured to determine that the smart key is in the first search area in response to a first receipt of the high-frequency signal from the smart key, to proceed with authentication for the smart key, to emit a wake-up signal to the AVNT smart connection device, and to control the low-frequency antenna to emit the low-frequency signal of the second power;
• wherein in response to a second receipt of the high-frequency signal from the authenticated smart key, the vehicle body control device is configured to determine that the authenticated smart key is in the second search area, to unfold the side mirror, and to emit a welcome sound output signal to the welcome speaker through the AVNT smart connection device;
• wherein in response to receiving the wake-up signal from the vehicle body control device, the AVNT smart connection device is configured to execute a booting program;
• and
• wherein in response to receiving the welcome sound output signal from the AVNT smart connection device, the welcome speaker is configured to output a welcome sound simultaneously with unfolding the side mirror by the vehicle body control device.