Near/far-field determination of reconfigurable intelligent surface (RIS) for mobile device positioning

A device for determining reconfigurable intelligent surface (RIS) operation for RIS-assisted position determination of a mobile device in a wireless communications system, the 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:
• determine, for one or more RISs, whether the mobile device is within a near-field operational distance of the RIS based at least in part on:
• a determined near-field operational distance of the RIS, and
• a relative distance between an initial position estimate of the mobile device and a location of the RIS, wherein the initial position estimate is determined by the mobile device;
• conduct a positioning session for the mobile device, wherein:
• the positioning session includes measurements made by the mobile device of radio frequency (RF) signals reflected from at least one RIS of the one or more RISs, and
• the measurements made by the mobile device are based, at least in part, on whether the mobile device is within the respective near-field operational distance of the at least one RIS of the one or more RISs;
• determine an RIS-assisted position of the mobile device based on the measurements made by the mobile device;
• and
• provide the determined RIS-assisted position of the mobile device.

A device for determining reconfigurable intelligent surface (RIS) operation for RIS-assisted position determination of a mobile device in a wireless communications system, the device comprising:

• means for determining, for one or more RISs, whether the mobile device is within a near-field operational distance of the RIS based at least in part on:
• a determined near-field operational distance of the RIS, and
• a relative distance between an initial position estimate of the mobile device and a location of the RIS, wherein the initial position estimate is determined by the mobile device;
• means for conducting a positioning session for the mobile device, wherein:
• the positioning session includes measurements made by the mobile device of radio frequency (RF) signals reflected from at least one RIS of the one or more RISs, and
• the measurements made by the mobile device are based, at least in part, on whether the mobile device is within the respective near-field operational distance of the at least one RIS of the one or more RISs;
• means for determining an RIS-assisted position of the mobile device based on the measurements made by the mobile device;
• and
• means for providing the determined RIS-assisted position of the mobile device.

A non-transitory computer-readable medium storing instructions for determining reconfigurable intelligent surface (RIS) operation for RIS-assisted position determination of a mobile device in a wireless communications system, the instructions comprising code for:

• determining, for one or more RISs, whether the mobile device is within a near-field operational distance of the RIS based at least in part on:
• a determined near-field operational distance of the RIS, and
• a relative distance between an initial position estimate of the mobile device and a location of the RIS, wherein the initial position estimate is determined by the mobile device;
• conducting a positioning session for the mobile device, wherein:
• the positioning session includes measurements made by the mobile device of radio frequency (RF) signals reflected from at least one RIS of the one or more RISs, and
• the measurements made by the mobile device are based, at least in part, on whether the mobile device is within the respective near-field operational distance of the at least one RIS of the one or more RISs;
• determining an RIS-assisted position of the mobile device based on the measurements made by the mobile device;
• and
• providing the determined RIS-assisted position of the mobile device.