Reconfigurable intelligent surface (ris)-aided ue passive rf sensing

A device comprising:

• a transceiver;
• a memory;
• and
• one or more processing units communicatively coupled with the transceiver and the memory, the one or more processing units configured to:
• configure a reconfigurable intelligent surface (RIS) to reflect a Line-Of-Sight (LOS) wireless signal toward a receiving device, wherein the LOS wireless signal comprises a first wireless reference signal transmitted by a Transmission Reception Point (TRP) of a wireless communications system;
• configure the RIS to reflect an echo signal toward the receiving device, wherein the echo signal comprises a reflection, off of an object, of a second wireless reference signal transmitted by the TRP of the wireless communications system;
• determine a position of the object based on:
• a position of the RIS relative to the TRP, and
• a time difference between a first Time of Arrival (ToA) of the LOS wireless signal at the receiving device and a second ToA of the echo signal at the receiving device;
• and
• provide the position of the object.

A device comprising:

• means for configuring a reconfigurable intelligent surface (RIS) to reflect a Line-Of-Sight (LOS) wireless signal toward a receiving device, wherein the LOS wireless signal comprises a first wireless reference signal transmitted by a Transmission Reception Point (TRP) of a wireless communications system;
• means for configuring the RIS to reflect an echo signal toward the receiving device, wherein the echo signal comprises a reflection, off of an object, of a second wireless reference signal transmitted by the TRP of the wireless communications system;
• means for determining a position of the object based on:
• a position of the RIS relative to the TRP, and
• a time difference between a first Time of Arrival (ToA) of the LOS wireless signal at the receiving device and a second ToA of the echo signal at the receiving device;
• and
• means for providing the position of the object.

A non-transitory computer-readable medium storing instructions for performing radio frequency (RF) sensing with a receiving device and a reconfigurable intelligent surfaces (RIS) in a wireless communications system, the instructions comprising code for:

• configuring the RIS to reflect a Line-Of-Sight (LOS) wireless signal toward a receiving device, wherein the LOS wireless signal comprises a first wireless reference signal transmitted by a Transmission Reception Point (TRP) of the wireless communications system;
• configuring the RIS to reflect an echo signal toward the receiving device, wherein the echo signal comprises a reflection, off of an object, of a second wireless reference signal transmitted by the TRP of the wireless communications system;
• determining a position of the object based on:
• a position of the RIS relative to the TRP, and
• a time difference between a first Time of Arrival (ToA) of the LOS wireless signal at the receiving device and a second ToA of the echo signal at the receiving device;
• and
• providing the position of the object.