Event-triggered reference signal transmission for carrier selection

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

• transmitting, to a base station, a message that indicates whether the UE received a downlink transmission via a physical downlink shared channel from the base station in a first frequency range;
• receiving, from the base station, information related to one or more reference signal (RS) transmissions that are scheduled in the first frequency range and one or more RS transmissions that are scheduled in a second frequency range based at least in part on the message transmitted to the base station;
• and
• receiving the downlink transmission on a component carrier in either the first frequency range or the second frequency range based at least in part on channel quality information that is determined from the one or more RS transmissions in the first frequency range and the one or more RS transmissions in the second frequency range.

A base station, comprising:

• one or more memories;
• and
• one or more processors coupled to the one or more memories, configured to:
• receive, from a user equipment (UE), a message that indicates whether the UE received a downlink transmission via a physical downlink shared channel from the base station in a first frequency range;
• schedule one or more reference signal (RS) transmissions in the first frequency range and one or more RS transmissions in a second frequency range based at least in part on the message received from the UE;
• and
• reschedule the downlink transmission on a component carrier in either the first frequency range or the second frequency range based at least in part on channel quality information that is determined from the one or more RS transmissions in the first frequency range and the one or more RS transmissions in the second frequency range.

A user equipment (UE), comprising:

• one or more memories;
• and
• one or more processors coupled to the one or more memories, configured to:
• transmit, to a base station, a message that indicates whether the UE received a downlink transmission via a physical downlink shared channel from the base station in a first frequency range;
• receive, from the base station, information related to one or more reference signal (RS) transmissions that are scheduled in the first frequency range and one or more RS transmissions that are scheduled in a second frequency range based at least in part on the message transmitted to the base station;
• and
• receive the downlink transmission on a component carrier in either the first frequency range or the second frequency range based at least in part on channel quality information that is determined from the one or more RS transmissions in the first frequency range and the one or more RS transmissions in the second frequency range.