Abstract: A vehicle access system having a plurality of system nodes arranged throughout a vehicle is disclosed. The vehicle access system employs a communication protocol which utilizes two way ranging (TWR) and time distance of arrival (TDoA) localization processes to determine a position of a target portable device. The communication protocol selects the optimal combination of TWR and TDoA estimations, depending on a number of system nodes that are in communication range of the target portable device, to provide the greatest accuracy with the best power efficiency at the target portable device. Particularly, the communication protocol minimizes the number of messages sent and received by the target portable device, thereby improving the power efficiency thereof. Furthermore, the communication protocol schedules messages between the system nodes and target portable device so as to minimize the wake time of the target portable device, thereby further improving the power efficiency thereof.

Abstract: A vehicle access system having a plurality of system nodes arranged throughout a vehicle is disclosed. The vehicle access system employs a communication protocol which utilizes two way ranging (TWR) and time distance of arrival (TDoA) localization processes to determine a position of a target portable device. The communication protocol selects the optimal combination of TWR and TDoA estimations, depending on a number of system nodes that are in communication range of the target portable device, to provide the greatest accuracy with the best power efficiency at the target portable device. Particularly, the communication protocol minimizes the number of messages sent and received by the target portable device, thereby improving the power efficiency thereof. Furthermore, the communication protocol schedules messages between the system nodes and target portable device so as to minimize the wake time of the target portable device, thereby further improving the power efficiency thereof.

Abstract: A system for powering components in a vehicle seat enables electronic components within the vehicle seat to receive power without wires connecting the seat to a vehicle body. The system includes a power transmitter that generates an electromagnetic field, and a power receiver located within the vehicle seat and the electromagnetic field. The power receiver is configured to generate electrical power from the electromagnetic field and deliver the power to at least one component in the vehicle seat.

Abstract: A system for powering components in a vehicle seat enables electronic components within the vehicle seat to receive power without wires connecting the seat to a vehicle body. The system includes a power transmitter that generates an electromagnetic field, and a power receiver located within the vehicle seat and the electromagnetic field. The power receiver is configured to generate electrical power from the electromagnetic field and deliver the power to at least one component in the vehicle seat.