Operational adaptation for reconfigurable intelligent surface aided positioning

1 . A method of wireless communication performed by a base station, comprising:

determining a capability of a reconfigurable intelligent surface, wherein the capability comprises at least one of:

an accuracy or a speed of a phase shift control of the reconfigurable intelligent surface, or

a power loss or a power gain of a beam reflected from the reconfigurable intelligent surface;

determining configuration information for a positioning reference signal, wherein the configuration information is based at least in part on the capability of the reconfigurable intelligent surface; and

transmitting a positioning signal based on the configuration information in a direction of the reconfigurable intelligent surface.

2 . The method of claim 1 further comprising:

providing the capability of the reconfigurable intelligent surface to a network server.

3 . The method of claim 1 wherein determining the capability of the reconfigurable intelligent surface comprises:

determining a beam shape of a beam reflected from the reconfigurable intelligent surface.

4 . The method of claim 3 , wherein the beam shape of the beam reflected from the reconfigurable intelligent surface is based on a 3 dB beamwidth.

5 . The method of claim 1 wherein determining configuration information for the positioning reference signal comprises:

determining a number of positioning reference signals to transmit in a positioning reference signal beam sweep.

6 . The method of claim 1 wherein determining configuration information for the positioning reference signal comprises:

determining a time gap between transmitting two or more positioning reference signals.

7 . The method of claim 1 wherein determining the capability of the reconfigurable intelligent surface comprises:

receiving a message comprising the capability information from a network server.

8 . The method of claim 1 wherein determining the capability of the reconfigurable intelligent surface comprises:

receiving a message comprising the capability from the reconfigurable intelligent surface.

9 . A method of wireless communication performed by a user equipment, comprising:

receiving positioning assistance data from a network;

determining a capability of a reconfigurable intelligent surface based on the positioning assistance data, wherein the capability comprises at least one of:

an accuracy or a speed of a phase shift control of the reconfigurable intelligent surface, or

a power loss or a power gain of a beam reflected from the reconfigurable intelligent surface;

receiving a reference signal from the reconfigurable intelligent surface; and

obtaining a measurement value for the reference signal based at least in part on the capability of the reconfigurable intelligent surface.

10 . The method of claim 9 wherein determining the capability of the reconfigurable intelligent surface comprises:

determining a beam shape the reference signal.

11 . The method of claim 10 , wherein the beam shape of the reference signal is based on a 3 dB beamwidth.

12 . The method of claim 9 further comprising:

determining a transmit power for an uplink reference signal based at least in part on the power loss or the power gain of the reference signal.

13 . The method of claim 9 wherein obtaining the measurement value for the reference signal comprises:

determining an angle of departure of the reference signal.

14 . The method of claim 9 wherein obtaining the measurement value for the reference signal comprises:

determining an uncertainty of a beamwidth of the reference signal.

15 . The method of claim 9 wherein obtaining the measurement value for the reference signal comprises:

determining a time of arrival of the reference signal.

16 . An apparatus, comprising:

a memory;

at least one transceiver; and

at least one processor communicatively coupled to the memory and the at least one transceiver, and configured to:

determine a capability of a reconfigurable intelligent surface, wherein the capability comprises at least one of:

an accuracy or a speed of a phase shift control of the reconfigurable intelligent surface, or

a power loss or a power gain of a beam reflected from the reconfigurable intelligent surface;

determine configuration information for a positioning reference signal, wherein the configuration information is based at least in part on the capability of the reconfigurable intelligent surface; and

transmit a positioning signal based on the configuration information in a direction of the reconfigurable intelligent surface.

17 . The apparatus of claim 16 wherein the at least one processor is further configured to:

determine a beam shape of a beam reflected from the reconfigurable intelligent surface.

18 . An apparatus, comprising:

a memory;

at least one transceiver; and

at least one processor communicatively coupled to the memory and the at least one transceiver, and configured to:

receive positioning assistance data from a network;

determine a capability of a reconfigurable intelligent surface based on the positioning assistance data, wherein the capability comprises at least one of:

an accuracy or a speed of a phase shift control of the reconfigurable intelligent surface, or

a power loss or a power gain of a beam reflected from the reconfigurable intelligent surface;

receive a reference signal from the reconfigurable intelligent surface; and

obtain a measurement value for the reference signal based at least in part on the capability of the reconfigurable intelligent surface.

19 . The apparatus of claim 18 wherein the at least one processor is further configured to:

determine a beam shape the reference signal.

20 . The apparatus of claim 18 wherein the at least one processor is further configured to:

determine an uncertainty of a beamwidth of the reference signal.