CSI resources and report configuration for full duplex channels

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

• receiving, from a base station, a full duplex (FD) downlink channel within an active downlink (DL) bandwidth part (BWP), the FD downlink channel being duplexed with a second FD channel in at least one sub-band full duplex (SBFD) symbol, wherein the second FD channel has carrier frequencies between carrier frequencies of a first portion of the FD downlink channel and carrier frequencies of a second portion of the FD downlink channel;
• determining a mapping of a channel state information reference signal (CSI-RS) to resource blocks (RBs) based on an intersection of the active DL BWP and the at least one DL sub-band or the at least one other DL sub-band in the first symbol;
• and
• receiving, from the base station, a channel state information-reference signal (CSI-RS) on resources of the first portion of the FD downlink channel comprising at least one DL sub-band having a first symbol and on resources of the second portion of the FD downlink channel comprising at least one other DL sub-band having the first symbol, wherein
• the UE is configured with a first CSI reference resource comprising resources of the first portion of the FD downlink channel and resources of the second portion of the FD downlink channel,
• the first CSI reference resource does not include resources of the second FD channel, and
• the UE is configured with a second CSI reference resource comprising resources of the first portion of the FD downlink channel, resources of the second portion of the FD downlink channel, and resources of the second FD channel.

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

• transmitting, to a user equipment (UE), a full duplex (FD) downlink channel within an active downlink (DL) bandwidth part (BWP), the FD downlink channel being duplexed with a second FD channel in at least one sub-band full duplex (SBFD) symbol, wherein the second FD channel has carrier frequencies between carrier frequencies of a first portion of the FD downlink channel and carrier frequencies of a second portion of the FD downlink channel;
• determining a mapping of a channel state information reference signal (CSI-RS) to resource blocks (RBs) based on an intersection of the active DL BWP and the at least one DL sub-band or the at least one other DL sub-band in the first symbol;
• transmitting, to the UE, a channel state information reference signal (CSI-RS) (CSI-RS) on a first CSI reference resource on the first portion of the FD downlink channel comprising at least one DL sub-band having a first symbol and on a second CSI reference resource on the second portion of the FD downlink channel comprising at least one other DL sub-band having the first symbol;
• and
• receiving, from the UE, a channel state information (CSI) report based on the CSI-RS transmitted on the first portion and the second portion.

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

• transmitting, to a user equipment (UE), a full duplex (FD) downlink channel within an active downlink (DL) bandwidth part (BWP), the FD downlink channel being duplexed with a second FD channel in at least one sub-band full duplex (SBFD) symbol, wherein the second FD channel has carrier frequencies between carrier frequencies of a first portion of the FD downlink channel and carrier frequencies of a second portion of the FD downlink channel;
• determining a mapping of a channel state information reference signal (CSI-RS) to resource blocks (RBs) based on an intersection of the active DL BWP and the at least one DL sub-band or the at least one other DL sub-band in the first symbol;
• and
• transmitting, to the UE, a channel state information-reference signal (CSI-RS) on resources of the first portion of the FD downlink channel comprising at least one DL sub-band having a first symbol and on resources of the second portion of the FD downlink channel comprising at least one other DL sub-band having the first symbol, wherein
• the UE is configured with a first CSI reference resource comprising resources of the first portion of the FD downlink channel and resources of the second portion of the FD downlink channel,
• the first CSI reference resource does not include resources of the second FD channel, and
• the UE is configured with a second CSI reference resource comprising resources of the first portion of the FD downlink channel, resources of the second portion of the FD downlink channel, and resources of the second FD channel.