Techniques for carrier feedback in wireless systems

A method for wireless communication, comprising:

• identifying a first connection with a user equipment (UE) via a first carrier having a first subcarrier spacing;
• identifying a second connection with the UE via a second carrier having a second subcarrier spacing that is greater than the first subcarrier spacing;
• receiving, from the UE via one or more slots of the second carrier, feedback information for the first carrier including an indication of interference on the first carrier detected by the UE;
• determining, based at least in part on the indication of the interference on the first carrier received via the one or more slots of the second carrier, a modulation and coding scheme (MCS), rank, precoder, transmission power, resource allocation, or any combination thereof for a subsequent set of symbols of the first carrier;
• and
• transmitting, in response to the indication of the interference on the first carrier received via the one or more slots of the second carrier, an update indication that comprises the MCS, rank, precoder, transmission power, resource allocation, or any combination thereof for the subsequent set of symbols of the first carrier.

An apparatus for wireless communication, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a first connection with a primary cell via a first carrier having a first subcarrier spacing;
• identify a second connection with a secondary cell via a second carrier having a second subcarrier spacing that is greater than the first subcarrier spacing;
• detect interference on the first carrier;
• transmit, via one or more slots of the second carrier, feedback information for the first carrier including an indication of the detected interference on the first carrier;
• and
• update a modulation and coding scheme (MCS), rank, precoder, transmission power, resource allocation, or any combination thereof for a subsequent one or more symbols of the first carrier based at least in part on transmission of the indication of the detected interference via the one or more slots of the second carrier.

An apparatus for wireless communication, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a first connection with a user equipment (UE) via a first carrier having a first subcarrier spacing;
• identify a second connection with the UE via a second carrier having a second subcarrier spacing that is greater than the first subcarrier spacing;
• receive, from the UE via one or more slots of the second carrier, feedback information for the first carrier including an indication of interference on the first carrier detected by the UE;
• determine, based at least in part on the indication of the interference on the first carrier received via the one or more slots of the second carrier, a modulation and coding scheme (MCS), rank, precoder, transmission power, resource allocation, or any combination thereof for a subsequent set of symbols of the first carrier;
• and
• transmit, in response to the indication of the interference on the first carrier received via the one or more slots of the second carrier, an update indication that comprises the MCS, rank, precoder, transmission power, resource allocation, or any combination thereof for the subsequent set of symbols of the first carrier.