Aris location selection under aris-assisted wireless network

A method performed by a base unit, comprising:

• determining a target area;
• determining an expected phase shift coefficient for an aerial re-configurable intelligent surface (ARIS) at each of multiple time points according to the target area and a trajectory of the ARIS, wherein each of the multiple time points corresponds to a location of the ARIS along the trajectory;
• assigning the expected phase shift coefficients at the multiple time points to the ARIS;
• transmitting a reference signal to the ARIS at each of the multiple time points,
• wherein the ARIS forwards the reference signal at each of the multiple time points using the expected phase shift coefficient at the time point;
• receiving signal qualities measured at the multiple time points;
• determining a best signal quality from the signal qualities measured at the multiple time points;
• and
• determining the location corresponding to a time point at which the best signal quality is measured as an optimal location of the ARIS.

A user equipment (UE), comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the UE to:
• receive a reference signal forwarded by an aerial re-configurable intelligent surface (ARIS) at each of multiple time points using an expected phase shift coefficient at the time point;
• and
• if any one of signal qualities measured at the multiple time points is lower than a predetermined threshold, send, to a base unit, a measurement report including signal qualities measured at the multiple time points.