Spatial filter correspondence and random access procedures for reconfigurable intelligent surfaces

An apparatus for wireless communication to be performed by a user equipment (UE), comprising:

• memory;
• and
• a processor communicatively coupled with the memory and configured to:
• receive, from a base station, a synchronization signal block (SSB) via a reconfigurable intelligent surface (RIS), the SSB corresponding to a first SSB type configured for RIS-assisted procedures or corresponding to a second SSB type configured for non-RIS-assisted procedures;
• determine, based on the SSB, whether the RIS-assisted procedures are needed;
• and
• transmit, to the base station according to the SSB, an indication whether the SSB corresponds to the first SSB type as part of a random access channel (RACH) procedure, wherein the first SSB type indicates that the RIS-assisted procedures are needed.

An apparatus for wireless communication to be performed by a user equipment (UE), comprising:

• means for receiving, from a base station, a synchronization signal block (SSB) via a reconfigurable intelligent surface (RIS), the SSB corresponding to a first SSB type configured for RIS-assisted procedures or corresponding to a second SSB type configured for non-RIS-assisted procedures;
• means for determining, based on the SSB, whether the RIS-assisted procedures are needed;
• and
• means for transmitting, to the base station according to the SSB, an indication whether the SSB corresponds to the first SSB type as part of a random access channel (RACH) procedure, wherein the first SSB type indicates that the RIS-assisted procedures are needed.