Integrated access and backhaul sidelink function control

A method for wireless communication at a distributed unit of an integrated access and backhaul node performing sidelink communications with a user equipment (UE), comprising:

• identifying a selected distributed unit, the selected distributed unit selected by a central unit to control sidelink communications for the UE based at least in part on the selected distributed unit and the distributed unit performing the sidelink communications with the UE being collocated within the integrated access and backhaul node or on a first synchronization signal transmitted from the selected distributed unit being quasi-collocated with respect to a second synchronization signal transmitted from the distributed unit performing sidelink communications with the UE;
• determining a configuration of sidelink parameters for the sidelink communications with the UE based at least in part on the identifying, the sidelink parameters comprising an identification of the selected distributed unit;
• and
• transmitting an indication of the sidelink parameters to the UE.

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

• receiving, from a distributed unit of an integrated access and backhaul node performing sidelink communications with the UE, a configuration of sidelink parameters for sidelink communications with the distributed unit;
• identifying a selected distributed unit, the selected distributed unit selected by a central unit to control sidelink communications for the UE based at least in part on the selected distributed unit and the distributed unit performing the sidelink communications with the UE being collocated within the integrated access and backhaul node or on a first synchronization signal transmitted from the selected distributed unit being quasi-collocated with respect to a second synchronization signal transmitted from the distributed unit performing sidelink communications with the UE;
• and
• performing sidelink communications based at least in part on the selected distributed unit.

An apparatus for wireless communication at a central unit, comprising:

• at least one processor;
• at least one memory coupled with the at least one processor;
• and
• instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to:
• select, from a set of distributed units associated with the central unit, a distributed unit of an integrated access and backhaul node having a sidelink connection with a user equipment (UE) to control sidelink communications with the UE based at least in part on the distributed unit being collocated within the integrated access and backhaul node having the sidelink connection with the UE or on a first synchronization signal transmitted from the selected distributed unit being quasi-collocated with respect to a second synchronization signal transmitted from the distributed unit performing sidelink communications with the UE;
• determine a configuration of sidelink parameters for the sidelink communications with the UE, the sidelink parameters comprising an identification of the selected distributed unit;
• and
• transmit, to the integrated access and backhaul node performing sidelink communications with the UE, an indication of the configuration of sidelink parameters for the sidelink communications.