Initial acquisition and beam refinement from an intelligent reflecting surface using defocused beams

A method of wireless communication at a base station, comprising:

• identifying one or more beams toward a node for communication with at least one user equipment (UE), the one or more beams corresponding to a plurality of beams from the node;
• transmitting, to the node, an indication to adjust a surface phase of the node corresponding to the one or more beams or one of the plurality of beams from the node;
• selecting at least one beam of the plurality of beams from the node for communication with the at least one UE, the at least one beam being selected based on a defocusing operation in connection with a virtual focal point and at least one of:
• an azimuth or an elevation of the at least one beam, a random access channel (RACH) message from the at least one UE, a reference signal received power (RSRP) measurement of the at least one beam, or a width or a height of an enabled surface area of the node;
• and
• transmitting, to the at least one UE via the node, or receiving, from the at least one UE via the node, communication via the at least one beam.

An apparatus for wireless communication at a node, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive, from a base station, an indication to adjust a surface phase of the node corresponding to one or more beams toward the node or at least one of a plurality of beams from the node for communication with at least one user equipment (UE), the one or more beams corresponding to the plurality of beams;
• and
• send, via the at least one beam of the plurality of beams, communication from the base station to the at least one UE or communication from the at least one UE to the base station, the at least one beam being based on a defocusing operation in connection with a virtual focal point and at least one of:
• an azimuth or an elevation of the at least one beam, a random access channel (RACH) message from the UE, a reference signal received power (RSRP) measurement of the at least one beam, or a width or a height of an enabled surface area of the node.

A method of wireless communication at a node, comprising:

• receiving, from a base station, an indication to adjust a surface phase of the node corresponding to one or more beams toward the node or at least one of a plurality of beams from the node for communication with at least one user equipment (UE), the one or more beams corresponding to the plurality of beams;
• and
• sending, via the at least one beam of the plurality of beams, communication from the base station to the at least one UE or communication from the at least one UE to the base station, the at least one beam being based on a defocusing operation in connection with a virtual focal point and at least one of:
• an azimuth or an elevation of the at least one beam, a random access channel (RACH) message from the UE, a reference signal received power (RSRP) measurement of the at least one beam, or a width or a height of an enabled surface area of the node.