User equipment (ue) mobility between a non-terrestrial network (ntn) and a terrestrial network (tn)

An apparatus for wireless communications at a first network entity, comprising:

• a processor;
• and
• memory coupled with the processor, the processor configured to:
• output a first signal that comprises a request for a reference timestamp that corresponds to a second network entity, the first network entity being associated with a first cell type that operates via a first carrier frequency, and the second network entity being associated with a second cell type that operates via a second carrier frequency;
• obtain a second signal that indicates the reference timestamp that corresponds to the second network entity based at least in part on the request;
• and
• output a third signal that indicates the reference timestamp that corresponds to the second network entity and that configures a measurement gap for a user equipment (UE).

An apparatus for wireless communications at a second network entity, comprising:

• a processor;
• and
• memory coupled with the processor, the processor configured to:
• obtain a first signal that comprises a request for a reference timestamp that corresponds to the second network entity, the request associated with a first network entity, the first network entity associated with a first cell type that operates via a first carrier frequency, and the second network entity associated with a second cell type that operates via a second carrier frequency;
• output a second signal that indicates the reference timestamp that corresponds to the second network entity based at least in part on the request;
• and
• output a third signal during a measurement gap, the measurement gap based at least in part on the reference timestamp.