Timing advance offset for reconfigurable intelligent surface (RIS) aided wireless communication systems

A method of wireless communication performed by a user equipment (UE), comprising:

• receiving, from a base station (BS), a timing offset configuration associated with a first reconfigurable intelligent surface (RIS) state and a second RIS state;
• receiving, from the BS, a downlink (DL) signal;
• and
• transmitting, to the BS based on the timing offset configuration and a timing advance associated with at least one of the first RIS state or the second RIS state, an uplink (UL) communication.

A base station (BS), comprising:

• a transceiver;
• and
• a processor in communication with the transceiver, wherein the processor is configured to cause the transceiver to:
• transmit, to a user equipment (UE), a first timing offset configuration associated with a first reconfigurable intelligent surface (RIS) state and a second timing offset configuration associated with a second RIS state;
• transmit, to the UE, a timing offset indication indicating one of the first timing offset configuration or the second timing offset configuration;
• and
• receive, from the UE based on the timing offset indication, an uplink (UL) communication.

A user equipment (UE), comprising:

• a transceiver;
• and
• a processor in communication with the transceiver, wherein the processor is configured to cause the transceiver to:
• receive, from a base station (BS), a timing offset configuration associated with a first reconfigurable intelligent surface (RIS) state and a second RIS state;
• receive, from the BS, a downlink (DL) signal;
• and
• transmit, to the BS based on the timing offset configuration and a timing advance associated with at least one of the first RIS state or the second RIS state, an uplink (UL) communication.