Abstract: A vehicle door unlocking system that includes a mobile device that is provided with an interface for accepting an operation to unlock a plurality of doors provided on a vehicle, and is configured to transmit an operation signal when the interface has accepted the operation; and an on-board controller configured to perform, upon receiving the operation signal from the mobile device, control to unlock the plurality of doors based on the received operation signal.

Abstract: An antenna device includes a plurality of antenna elements mounted to one surface of a substrate, each of the plurality of antenna elements including: a flat plate portion that is shaped as a rectangular flat plate and is disposed to be spaced apart from the one surface of the substrate; and a connection portion that connects one end side of the flat plate portion in a longitudinal direction to the substrate, wherein each of the plurality of antenna elements is disposed along a peripheral edge of the substrate such that the longitudinal direction of the flat plate portion of one antenna element intersects the longitudinal direction of the flat plate portion of at least one other antenna element.

Abstract: A vehicle communication system includes an on-board device that transmits a position detection signal; and a portable device that receives the position detection signal and transmits a response signal. The portable device detects a walk state of a user holding the portable device; and transmits a walk state signal that indicates the walk state. The on-board device receives the response signal and the walk state signal transmitted from the portable device, and determines whether or not a vehicle door needs to be locked, based on the signals thus received. Upon determining that the vehicle door needs to be locked, the on-board device outputs a lock signal.

Abstract: Provided is a vehicle door unlocking system and an on-board control device that can ensure security when the vehicle doors are unlocked. The vehicle door unlocking system includes: a mobile device that is provided with an operation unit for accepting an operation to unlock the plurality of doors of a vehicle, and is configured to transmit an operation signal when the operation unit has accepted the operation; and an on-board control device configured to perform, upon receiving the operation signal from the mobile device, control to unlock the plurality of doors based on the received operation signal. The on-board control device includes: a detection unit configured to detect the mobile device, and is configured to unlock only a specific door of the plurality of doors provided on the vehicle upon receiving the operation signal from the mobile device without the mobile device being detected by the detection unit.

Abstract: A door unlocking system with which only a specific door can also be unlocked if a user operates an operation unit of a communication device. A control device determines whether or not a communication device is present in any of regions Ra to Rc by communicating with the communication device located outside of the vehicle, using a wireless communication unit in the vehicle. When an operation signal transmitted from the communication device is received by the wireless communication unit in the vehicle in a case where the communication device is present in any of the regions Ra to Rc, only a door that is associated with the region Ra (or Rb or Rc) in which the communication device is present is unlocked.

Abstract: Provided is a door unlocking system with which only a specific door can also be unlocked if a user operates an operation unit of a communication device. A control device (1) determines whether or not a communication device (2) is present in any of regions Ra to Rc by communicating with the communication device (2) located outside of the vehicle, using a wireless communication unit (12) in the vehicle. When an operation signal transmitted from the communication device (2) is received by the wireless communication unit (12) in the vehicle in a case where the communication device (2) is present in any of the regions Ra to Rc, only a door that is associated with the region Ra (or Rb or Rc) in which the communication device (2) is present is unlocked.