Soft cancellation of sidelink transmissions

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

• one or more memories;
• and
• one or more processors coupled to the one or more memories and configured to:
• receive, from a base station, downlink control information (DCI) comprising at least one of:
• an open loop power control parameter, a maximum transmit power, or a closed loop power control parameter, wherein the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter is associated with a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH);
• reduce a transmit power of a scheduled transmission associated with the PSSCH or the PSCCH to a reduced transmit power if the reduced transmit power is above a threshold or cancel the scheduled transmission if the reduced transmit power is below the threshold, wherein the reduced transmit power is based on the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter;
• and
• wherein to reduce the transmit power, the one or more processors coupled to the one or more memories is further configured to:
• measure a second transmit power associated with a transmission from a high-priority (HP) UE;
• and
• calculate the reduced transmit power based on the second transmit power and at least one of the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter.

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

• one or more memories;
• and
• one or more processors coupled to the one or more memories and configured to:
• receive, from a base station, downlink control information (DCI) comprising at least one of:
• an open loop power control parameter, a maximum transmit power, or a closed loop power control parameter, wherein the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter is associated with a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH);
• and
• receive, from a second UE, a scheduled transmission with a transmit power, based on the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter, the transmit power of the scheduled transmission associated with the PSSCH or the PSCCH if the transmit power is above a threshold;
• wherein the threshold is based on an interference level associated with a transmission from a high-priority (HP) UE to the first UE for a period of time, wherein the transmission from the HP UE includes an overlap with the scheduled transmission.

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

• one or more memories;
• and
• one or more processors coupled to the one or more memories and configured to:
• receive, from a base station, downlink control information (DCI) comprising at least one of:
• an open loop power control parameter, a maximum transmit power, or a closed loop power control parameter, wherein the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter is associated with a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH);
• and
• receive, from a second UE, a scheduled transmission with a transmit power, based on the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter, the transmit power of the scheduled transmission associated with the PSSCH or the PSCCH if the transmit power is above a threshold;
• wherein the transmit power is based on a second transmit power associated with a transmission from a high-priority (HP) UE to the first UE and at least one of the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter.

A method for wireless communication at a first user equipment (UE), including:

• receiving, from a base station, DCI including at least one of:
• an open loop power control parameter, a maximum transmit power, or a closed loop power control parameter, The open loop power control parameter, the maximum transmit power, or the closed loop power control parameter may be associated with a PSSCH or a PSCCH;
• reducing a transmit power of a scheduled transmission associated with the PSSCH or the PSCCH to a reduced transmit power if the reduced transmit power is above a threshold or cancelling the scheduled transmission if the reduced transmit power is below the threshold, wherein the reduced transmit power is based on the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter;
• and
• measuring an interference level associated with a transmission from a high-priority (HP) UE for a period of time, wherein the transmission from the HP UE comprises an overlap with the scheduled transmission, wherein the threshold is based on the measured interference level.

A method for wireless communication at a first user equipment (UE), including:

• receiving, from a base station, downlink control information (DCI) comprising at least one of:
• an open loop power control parameter, a maximum transmit power, or a closed loop power control parameter, wherein the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter is associated with a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH);
• and
• receiving, from a second UE, a scheduled transmission with a transmit power, based on the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter, the transmit power of the scheduled transmission associated with the PSSCH or the PSCCH if the transmit power is above a threshold;
• wherein the threshold is based on an interference level associated with a transmission from a high-priority (HP) UE to the first UE for a period of time, wherein the transmission from the HP UE includes an overlap with the scheduled transmission.