US 11,729,736 B2
Time adjustment during handover
Emad N. Farag, Flanders, NJ (US); Hongbo Si, Plano, TX (US); Nishith D. Tripathi, Parker, TX (US); and Kyeongin Jeong, Allen, TX (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jul. 28, 2021, as Appl. No. 17/443,932.
Claims priority of provisional application 63/062,167, filed on Aug. 6, 2020.
Prior Publication US 2022/0046574 A1, Feb. 10, 2022
Int. Cl. H04W 4/00 (2018.01); H04W 56/00 (2009.01); H04W 74/08 (2009.01); H04L 27/26 (2006.01); H04W 36/00 (2009.01); H04W 84/06 (2009.01)
CPC H04W 56/0045 (2013.01) [H04L 27/2607 (2013.01); H04W 36/0072 (2013.01); H04W 74/0841 (2013.01); H04W 84/06 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
a transceiver configured to:
receive configuration information for a first and a second reference signal (RS), and
receive the first RS from a first base station (BS) and the second RS from a second BS; and
a processor operably connected to the transceiver, the processor configured to:
measure a time of arrival of the second RS relative to a time of arrival of the first RS,
determine a differential propagation delay between the first RS and the second RS based on the times of arrival, and
determine a transmission time for an uplink (UL) UE-dedicated channel to the second BS based on the differential propagation delay,
wherein the transceiver is further configured to:
transmit, to the second BS, a physical random access channel (PRACH) associated with a random access channel (RACH) procedure, and
transmit the UL UE-dedicated channel to the second BS based on the determined transmission time before receiving a timing advance (TA) command associated with the PRACH transmission.