Passive entry passive start systems employing consumer mobile devices as portable remote control units
First Claim
1. A method comprising:
- upon a base station at a target device and a phone in a presence of the target device being detected as being matching devices, placing a near field communications (NFC) receiver of the phone into an operational mode so that the NFC receiver is enabled to receive NFC signals from the base station, transmitting a NFC challenge signal from a NFC transmitter of the base station to the NFC receiver of the phone while the NFC receiver is in the operational mode, and wherein the NFC receiver is placed into the operational mode during a pre-set time period corresponding to a time period in which the NFC challenge signal is expected to be transmitted from the base station;
transmitting a response signal having an answer to the NFC challenge signal from the phone to the base station; and
enabling by the base station a function of the target device when the answer is valid.
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Accused Products
Abstract
A system includes a base station at a target device and a consumer mobile device such as a phone. The phone includes a wireless receiver, such as a near field communications (NFC) or low-frequency (LF) receiver. The base station includes a wireless transmitter of the same type. The phone and the base station each further include a transceiver such as a Bluetooth™ transceiver or Bluetooth™ low energy (BLE) transceiver. Upon the base station and the phone in a presence of the target device being detected as being matching devices, the phone turns on its receiver, if it is not already on. The transmitter of the base station then transmits a challenge signal. The transceiver of the phone transmits a response signal having an answer to the challenge signal to the transceiver of the base station. The base station enables a function of the target device when the answer is valid.
15 Citations
14 Claims
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1. A method comprising:
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upon a base station at a target device and a phone in a presence of the target device being detected as being matching devices, placing a near field communications (NFC) receiver of the phone into an operational mode so that the NFC receiver is enabled to receive NFC signals from the base station, transmitting a NFC challenge signal from a NFC transmitter of the base station to the NFC receiver of the phone while the NFC receiver is in the operational mode, and wherein the NFC receiver is placed into the operational mode during a pre-set time period corresponding to a time period in which the NFC challenge signal is expected to be transmitted from the base station; transmitting a response signal having an answer to the NFC challenge signal from the phone to the base station; and enabling by the base station a function of the target device when the answer is valid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a base station at a target device, the base station having a controller, a near field communications (NFC) transmitter, and a transceiver; a phone having a NFC receiver and a transceiver; wherein when the base station and the phone are detected as being matching devices while the phone is in a presence of the base station, the phone is configured to place the NFC receiver into an operational mode so that the NFC receiver is enabled to receive NFC signals from the base station, the NFC transmitter is configured to transmit a NFC challenge signal to the NFC receiver while the NFC receiver is in the operational mode, and wherein the phone is further configured to place the NFC receiver into the operational mode during a pre-set time period corresponding to a time period in which the NFC challenge signal is expected to be transmitted from the base station; wherein the transceiver of the base station is configured to receive a response signal having an answer to the NFC challenge signal from the transceiver of the phone; and wherein the controller is configured to enable a function of the target device when the answer is valid. - View Dependent Claims (11, 12, 13, 14)
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Specification