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

Claim 0:
1. An infrastructure-controller for an infrastructure, the infrastructure-controller configured to:
send a ranging-scheduling-signal to a key, wherein the ranging-scheduling-signal comprises timing-information for a subsequent ranging operation; and
activate one or more ranging nodes associated with the infrastructure, for receiving a key-ranging-signal from the key, at an infrastructure-node-start-ranging-time based on the timing-information;
wherein:
the ranging-scheduling-signal has a frequency in a first RF frequency range;
the key-ranging-signal has a frequency 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 are subsequently deactivated based on the timing information.