Methods and systems for remotely assisting parking or unparking a vehicle

A method for a vehicle system to assist to remotely parking or unparking a vehicle, the method comprising:

• transmitting, to a remote device, first data for triggering a challenge response;
• receiving, as the challenge response from the remote device, second data, wherein the second data comprises a first information about a touch position on a touch screen of the remote device and a second information indicating a position of the remote device in relation to ground;
• determining whether the challenge response is valid;
• if the challenge response is valid, controlling the vehicle to move;
• and
• if the challenge response is not valid, controlling the vehicle to brake;
• wherein the challenge response is valid if the second information indicates that the remote device forms an angle with the ground within a tilt range and one of the following is true:
• if the touch position is a touch movement from an initial position to an end position that is equal to or less than a set drag distance;
• or
• if the touch position is within a certain range from a previous touch position corresponding to a previously received second data, and if the second information indicates that the position of the remote device is different than a previous position indicated by previously received second information.

A method for a remote device comprising:

• receiving first data from a vehicle system;
• receiving, from a user of the remote device, a touch input on one or more positions of a touch screen of the remote device while keeping the remote device in a position such that the remote device forms an angle with the ground within a tilt range;
• and
• sending, by the remote device to the vehicle system, second data in response to the first data, the second data comprising a first information about the touch input, and a second information indicating the angle formed by the remote device with the ground.