Techniques for activating sidelink carrier aggregation during a switch from direct to indirect communication

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:
• transmit a first set of one or more synchronization signals via a first component carrier and a second set of one or more synchronization signals via a second component carrier;
• establish a sidelink connection between a first user equipment (UE) and a second UE in accordance with a switch from direct communication between the first UE and a network entity to indirect communication between the first UE and the network entity via the second UE;
• and
• transmit data to, or receive data from, the first UE in accordance with the indirect communication between the first UE and the network entity via the second UE and a sidelink carrier aggregation between the first UE and the second UE.

An apparatus for wireless communication at a network entity, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a first user equipment (UE), a first measurement report associated with a first set of one or more synchronization signals transmitted by a second UE via a first component carrier and a second measurement report associated with a second set of one or more synchronization signals transmitted by the second UE via a second component carrier;
• transmit a first control message associated with indirect communication between the first UE and the network entity via the second UE, wherein the first control message includes a set of parameters associated with a sidelink carrier aggregation between the first UE and the second UE based at least in part on the first measurement report and the second measurement report;
• and
• receive a second control message responsive to the first control message, wherein the second control message indicates a completion of a sidelink connection between the first UE and the second UE in accordance with the sidelink carrier aggregation.

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

• receiving, from a second UE, a first set of one or more synchronization signals via a first component carrier and a second set of one or more synchronization signals via a second component carrier;
• transmitting a first measurement report associated with the first set of one or more synchronization signals and a second measurement report associated with the second set of one or more synchronization signals;
• and
• receiving a control message associated with indirect communication between the first UE and a network entity via the second UE, wherein the control message includes a set of parameters associated with a sidelink carrier aggregation between the first UE and the second UE based at least in part on the first measurement report and the second measurement report.