Random access channel (RACH)-less timing advance determination

A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:

• transmitting information identifying a reference signal timing difference (RSTD) between a target base station and a source base station associated with a handover;
• and
• receiving information identifying a target base station timing advance value, wherein the information identifying the target base station timing advance value is based at least in part on the RSTD between the target base station and the source base station.

A method of wireless communication performed by an apparatus of a target base station, comprising:

• receiving, from a user equipment (UE), information identifying a reference signal timing difference (RSTD) between the apparatus of the target base station and a source base station, wherein the apparatus of the target base station and the source base station are associated with a handover of the UE;
• and
• providing, to the UE, information identifying a target base station timing advance value, wherein the target base station timing advance value is based at least in part on the information identifying the RSTD between the apparatus of the target base station and the source base station.

An apparatus of a user equipment (UE) for wireless communication, comprising:

• a first interface configured to output information identifying a reference signal timing difference (RSTD) between a target base station and a source base station associated with a handover;
• and
• a second interface configured to obtain information identifying a target base station timing advance value, wherein the information identifying the target base station timing advance value is based at least in part on the RSTD between the target base station and the source base station.