Patent ID: 9563990
Date: 2017-02-07
CPC Classifications: B60R,G07C

Claim:
1. An access unit configured to control access to a vehicle via communication with a further access unit, the access unit comprising: a first transmitter configured to transmit a polling signal; and a first receiver configured to receive an authentication signal from the further access unit in response to said polling signal; wherein the first transmitter is a first ultra-wideband transmitter and the first receiver is a first ultra-wideband receiver; wherein the first transmitter is configured to pulse the polling signal with a time interval between transmissions; wherein the first transmitter is configured to: wherein the further access unit comprises a controller configured to authenticate a response signal transmitted from the access unit in response to said authentication signal; and wherein the controller is configured to initiate unlocking of at least one vehicle door when the distance between the access unit and the further access unit is less than or equal to a threshold range; and the controller is configured to initiate locking of at least one vehicle door when the distance between the access unit and the further access unit is greater than or equal to a threshold range.