Enhancements to data radio bearer parameters for ue-to-ue relays

An apparatus for wireless communications at a relay user equipment (UE), 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 a control message indicating a plurality of per-hop sidelink data radio bearer parameters, the plurality of per-hop sidelink data radio bearer parameters associated with a plurality of communication hops between the relay UE and a destination UE;
• receive user data via a first sidelink interface in accordance with a first set of per-hop sidelink data radio bearer parameters of the plurality of per-hop sidelink data radio bearer parameters, the user data being for the destination UE and the first sidelink interface corresponding to a first communication hop of the plurality of communication hops;
• and
• transmit the user data via a second sidelink interface in accordance with a second set of per-hop sidelink data radio bearer parameters of the plurality of per-hop sidelink data radio bearer parameters, the second sidelink interface corresponding to a second communication hop of the plurality of communication hops.

An apparatus for wireless communications 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:
• establish a wireless connection between the network entity and a source user equipment (UE);
• and
• transmit, via the wireless connection and to the source UE, a first control message indicating a set of end-to-end sidelink data radio bearer parameters and a plurality of per-hop sidelink data radio bearer parameters, the set of end-to-end sidelink data radio bearer parameters associated with communications between the source UE and a destination UE, the plurality of per-hop sidelink data radio bearer parameters associated with a plurality of communication hops between the source UE and the destination UE.

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

• receiving a control message indicating a set of end-to-end sidelink data radio bearer parameters and a plurality of per-hop sidelink data radio bearer parameters, the set of end-to-end sidelink data radio bearer parameters associated with communications between the source UE and a destination UE, the plurality of per-hop sidelink data radio bearer parameters associated with a plurality of communication hops between the source UE and the destination UE;
• transmitting, via a first sidelink interface, control data to the destination UE in accordance with the set of end-to-end sidelink data radio bearer parameters;
• and
• transmitting, via a second sidelink interface, user data to a relay UE in accordance with a first set of per-hop sidelink data radio bearer parameters of the plurality of per-hop sidelink data radio bearer parameters, the user data being for the destination UE and the second sidelink interface corresponding to a first communication hop of the plurality of communication hops.