System and methods for vehicle passive keyless entry triggered by smartphone proximity detection

A method comprising:

• establishing a wireless connection between a smartphone and a vehicle when a first distance between the smartphone and the vehicle is within a first pre-determined distance value;
• sending a wake-up signal to a key fob in wireless communication with the vehicle when a second distance between the smartphone and the vehicle is within a second pre-determined distance value;
• and
• activating a vehicle function within the vehicle when the key fob is located within a predefined authorization zone.

A method comprising:

• initiating a wireless connection between a smartphone and a vehicle when the smartphone is within a first communication range from the vehicle, wherein the wireless connection is used to track a distance between the smartphone and the vehicle;
• transmitting a wake-up signal to a key fob when the smartphone is within a second communication range from the vehicle, the second communication range being less than the first communication range;
• and
• receiving ultra-wideband (UWB) signals from the key fob to determine a position of the key fob when the key fob is within the second communication range.