Mobility signaling for relay activation

An apparatus for wireless communications at an apparatus of a base station (BS), comprising:

• a processing system configured to:
• configure a relay user equipment (UE) for relaying communications with a UE;
• and
• determine an activated subset of cells in a set of cells associated with the BS and the configuration of the relay UE;
• a first interface configured to:
• output, for transmission to the UE, control signaling indicating the relay UE and the set of cells;
• and
• the first interface or a second interface configured to:
• communicate with the UE via the relay UE and the activated subset of cells.

A method for wireless communications at an apparatus of a user equipment (UE), comprising:

• receiving, from a base station (BS), control signaling indicating a relay UE and a set of cells associated with the BS, the relay UE configured for relaying communications with the BS;
• establishing a communications link with the relay UE;
• determining an activated subset of cells in the set of cells associated with the control signaling and the communications link;
• and
• communicating with the BS via the relay UE and the activated subset of cells.

A method for wireless communications at an apparatus of a base station (BS), comprising:

• configuring a relay user equipment (UE) for relaying communications with a UE;
• determining an activated subset of cells in a set of cells associated with the BS and the configuration of the relay UE;
• transmitting, to the UE, control signaling indicating the relay UE and the set of cells;
• and
• communicating with the UE via the relay UE and the activated subset of cells.