Pathloss computation for power control in the presence of reconfigurable interactive surfaces

An apparatus for wireless communications at a user equipment (UE), comprising:

• a processor;
• a memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive a plurality of reference signals (RSs), each RS of the plurality of RSs being associated with a reflection from a respective reconfigurable intelligent surface (RIS), of a plurality of RISs, or with a direct transmission from a base station;
• receive, from the base station, a RIS configuration indicating a set of operative RISs, of the plurality of RISs, that reflect an uplink transmission from the UE;
• and
• transmit, to the base station, an uplink message according to an uplink transmission power, the uplink transmission power being based on an effective pathloss that is a function of each pathloss of a set of pathlosses respectively associated with a set of RSs, of the plurality of RSs, that are respectively associated with the set of operative RISs or the base station.

A method for wireless communication performed by a base station, comprising:

• transmitting, to a user equipment (UE), a reference signal (RS) configuration for configuring the UE to receive a plurality of RSs, each RS of the plurality of RSs being associated with a reflection from a respective reconfigurable intelligent surface (RIS), of a plurality of RISs, or with a direct transmission from a base station;
• transmitting, to the UE, a RIS configuration indicating a set of operative RISs, of the plurality of RISs, that reflect an uplink transmission from the UE;
• and
• receiving, from the UE, an uplink message according to an uplink transmission power, the uplink transmission power being based on an effective pathloss that is a function of each pathloss of a set of pathlosses respectively associated with a set of RSs, of the plurality of RSs, that are respectively associated with the set of operative RISs or the base station.

An apparatus for wireless communications at a base station, comprising:

• a processor;
• a memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• transmit, to a user equipment (UE), a reference signal (RS) configuration for configuring the UE to receive a plurality of RSs, each RS of the plurality of RSs being associated with a reflection from a respective reconfigurable intelligent surface (RIS), of a plurality of RISs, or with a direct transmission from a base station;
• transmit, to the UE, a RIS configuration indicating a set of operative RISs, of the plurality of RISs, that reflect an uplink transmission from the UE;
• and
• receive, from the UE, an uplink message according to an uplink transmission power, the uplink transmission power being based on an effective pathloss that is a function of each pathloss of a set of pathlosses respectively associated with a set of RSs, of the plurality of RSs, that are respectively associated with the set of operative RISs or the base station.