Proximity confirming passive access system for vehicle

1. A method for controlling access to a predetermined function of a component within a system that includes a vehicle with a vehicle controller, a first portable device with a first portable controller, and a second portable device with a second portable controller, the method comprising:

communicating, between the vehicle controller, the first portable controller, and the second portable controller, a plurality of signals, the plurality of signals including an authentication signal and a wireless connection request signal;

processing, by at least one of the vehicle controller, the first portable controller, and the second portable controller, the authentication signal during an authentication confirmation process to determine authentication of at least one of the first and second portable devices with respect to the vehicle;

processing, by at least one of the vehicle controller, the first portable controller, and the second portable controller, the wireless connection request signal during a proximity confirmation process to determine whether the vehicle controller and at least one of the first and second portable controllers are connected for wireless communication;

determining, during the proximity confirmation process, that the first and second portable devices are within a predetermined proximity of the vehicle when:

the first portable controller and the second portable controller are connected together for wireless communication; and

the vehicle controller is connected with at least one of the first portable controller and the second portable controller; and

providing access to the predetermined function of the component when both:

the at least one of the first and second portable devices is authenticated with respect to the vehicle according to the authentication confirmation process; and

the first and second portable devices are within the predetermined proximity of the vehicle according to the proximity confirmation process.

2. The method of claim 1 , wherein providing access to the predetermined function includes at least one of:

unlocking a door of the vehicle;

energizing a starter of a vehicle engine;

displaying a message on a vehicle display of the vehicle; and

displaying a message on a portable display of the at least one portable device.

3. The method of claim 1 , further comprising:

detecting a vehicle geographical location of the vehicle;

detecting a portable device geographical location of at least one of the first portable device and the second portable device; and

comparing, by at least one of the vehicle controller, the first portable controller, and the second portable controller, the detected vehicle geographical location to the portable device geographical location during the proximity confirmation process to determine whether the first and second portable devices are within the predetermined proximity of the vehicle.

4. The method of claim 3 ,

further comprising comparing, by the vehicle controller, the detected vehicle geographical location of the vehicle to the detected portable device geographical location.

5. The method of claim 3 ,

further comprising comparing, by at least one of the first portable controller and the second portable controller, the detected portable device geographical location to the detected vehicle geographical location.

6. The method of claim 1 , further comprising:

sending, by the vehicle controller, a challenge signal; and

receiving, by the vehicle controller from at least one of the first portable controller and the second portable controller, the authentication signal in response to the challenge signal.

7. The method of claim 1 , wherein

communicating the plurality of signals includes:

communicating the authentication signal using a first communication protocol; and

communicating the wireless connection request location based signal using a second communication protocol; and

wherein the first communication protocol is a first radio communication protocol and the second communication protocol is a second radio communication protocol that is out-of-band from the first radio communication protocol.

8. A vehicle configured to control access to a function according to wireless communications with a first portable device and a second portable device, the vehicle comprising:

a vehicle controller including an authentication module and a location module;

a vehicle communication device configured to wirelessly communicate with at least one of the first portable device and the second portable device using a first communication protocol and a second communication protocol; and

a vehicle component configured to selectively perform a predetermined function;

the vehicle controller configured to receive, via the vehicle communication device and using the first communication protocol, an authentication signal from at least one of the first portable device and the second portable device;

the vehicle controller configured to receive, via the vehicle communication device and using the second communication protocol, a wireless connection request signal from at least one of the first portable device and the second portable device;

the vehicle controller configured to process the authentication signal during an authentication confirmation process to determine authentication of at least one of the first portable device and the second portable device with respect to the vehicle;

the vehicle controller configured to process the wireless connection request signal during a proximity confirmation process to determine whether the vehicle controller and at least one of the first and second portable devices are connected for wireless communication;

the vehicle controller configured to determine, during the proximity confirmation process, whether the first and second portable devices are within a predetermined proximity of the vehicle based on whether:

the vehicle wirelessly connects with at least one of the first and second portable devices; and

the first portable device and the second portable device connect together for wireless communication;

the vehicle controller configured to send a control signal to the vehicle component for performing the predetermined function when both:

the at least one of the first portable device and the second portable device is authenticated with respect to the vehicle according to the authentication confirmation process; and

the first and second portable devices are within the predetermined proximity of the vehicle according to the proximity confirmation process.

9. The vehicle of claim 8 , wherein the first portable device is configured to provide the authentication signal to the vehicle controller; and

wherein the second portable device is configured to provide the wireless connection request signal to the vehicle controller.

10. The vehicle of claim 8 , wherein the first communication protocol and the second communication protocol are both radio communication protocols, and wherein the first communication protocol is out-of-band as compared to the second communication protocol.

11. The vehicle of claim 8 ,

wherein the vehicle component is at least one of:

a door lock for a door of a vehicle;

a starter of an engine of the vehicle; and

a display; and

wherein the predetermined function is at least one of:

an unlock function of the door lock;

an energization function of the starter of the engine; and

a display function of the display.

12. The vehicle of claim 8 , further comprising a sensor configured to detect a geographical location of the vehicle, the vehicle location signal corresponding to the geographical location of the vehicle;

wherein the vehicle controller is configured to receive a location signal from at least one of the first portable device and the second portable device, the location signal corresponding to a detected geographical location of the at least one of the first portable device and the second portable device; and

wherein the vehicle controller, during the proximity confirmation process, is configured to compare the geographical location of the vehicle to the geographical location of the at least one of the first portable device and the second portable device.

13. A method for controlling access to a predetermined function of a component of a vehicle based on wireless communications between the vehicle and a portable device, the vehicle including a vehicle controller and the portable device including a portable device controller, the method comprising:

transmitting, from the vehicle to the portable device, a challenge signal;

receiving, by the vehicle, an authentication signal from the portable device in response to the challenge signal;

processing, by the vehicle controller, the authentication signal during an authentication confirmation process to determine authentication of the portable device with respect to the vehicle;

receiving, by the vehicle, a location signal from the portable device, the location signal corresponding to a detected geographical location of the portable device;

detecting, by the vehicle controller, a geographical location of the vehicle;

processing, by the vehicle controller, the location signal during a proximity confirmation process, including comparing the detected geographical location of the portable device to the detected geographical location of the vehicle to determine whether the portable device is within a predetermined proximity of the vehicle; and

providing, by the vehicle controller, access to the predetermined function of the component of the vehicle when both:

the portable device is authenticated with respect to the vehicle according to the authentication confirmation process; and

the portable device is within the predetermined proximity of the vehicle according to the proximity confirmation process.

14. The method of claim 13 , wherein providing access to the predetermined function includes at least one of:

unlocking a door of the vehicle;

energizing a starter of a vehicle engine; and

displaying a message on a vehicle display of the vehicle.

15. The method of claim 13 , wherein transmitting the challenge signal and receiving the authentication signal is performed using a first communication protocol;

wherein receiving the location signal is performed using a second communication protocol; and

wherein the first communication protocol is a first radio communication protocol and the second communication protocol is a second radio communication protocol that is out-of-band from the first radio communication protocol.