Patent ID: 11889376
Assignee: LG INNOTEK CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC B  H | IPC H

Claim 10:
11. A vehicle smart key fob device comprising:
a second antenna having a first coverage zone and a third antenna having a second coverage zone narrower than the first coverage zone;
a nearfield communication unit configured to transmit and receive a signal through the second antenna or the third antenna;
an antenna switch configured to connect any one of the second antenna and the third antenna to the nearfield communication unit; and
a controller configured to:
connect the second antenna and transmit an advertising signal in response to a vehicle entering a security mode,
establish a connection with a first antenna of the device and request the device to transmit received signal strength indicator (RSSI) data in response to detecting the device,
perform a first determination operation of determining whether the device enters a target proximity zone or a target zone based on the RSSI data received through the second antenna,
control the antenna switch to connect the third antenna and to disconnect the second antenna, in response to determining that the device enters the target proximity zone or the target zone through the first determination operation,
perform a second determination operation of determining whether the device enters the target zone based on the RSSI data received through the third antenna, and
finally determine that the device enters the target zone in response to determining that the device enters the target zone through the second determination operation.