Patent ID: 11875619
Assignee: NXP B.V.
Field: Control (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 13:
14. A key-controller configured to:
receive a ranging-scheduling-signal from an infrastructure, wherein the ranging-scheduling-signal comprises timing-information for a subsequent ranging operation; and
cause the key to send a key-ranging-signal to the infrastructure, at a key-ranging-time based on the timing-information, wherein one or more ranging nodes of the infrastructure are activated based on the timing information;
wherein:
the ranging-scheduling-signal has a frequency in a first RF frequency range;
the key-ranging-signal is in a second RF frequency range;
the timing information of the range-scheduling signal indicates a time when the key is to send the key ranging signal to the infrastructure; and
the one or more ranging nodes of the infrastructure are subsequently deactivated based on the timing information.