US 12,075,304 B2
Handover optimization during 5G to 4G mobility
Muhammad Tawhidur Rahman, Bellevue, WA (US)
Assigned to T-Mobile USA, Inc., Bellevue, WA (US)
Filed by T-Mobile USA, Inc., Bellevue, WA (US)
Filed on Sep. 23, 2022, as Appl. No. 17/951,671.
Application 17/951,671 is a continuation of application No. 17/017,305, filed on Sep. 10, 2020, granted, now 11,490,314.
Prior Publication US 2023/0010264 A1, Jan. 12, 2023
Int. Cl. H04W 36/32 (2009.01); H04B 17/318 (2015.01); H04W 24/10 (2009.01); H04W 36/00 (2009.01); H04W 76/27 (2018.01)
CPC H04W 36/32 (2013.01) [H04B 17/318 (2015.01); H04W 24/10 (2013.01); H04W 36/0022 (2013.01); H04W 36/0058 (2018.08); H04W 76/27 (2018.02)] 11 Claims
OG exemplary drawing
 
1. A user equipment comprising:
a processor; and
a memory storing instructions for execution by the processor for completing a fallback process between a base station and the user equipment in a cellular network, the instructions for:
determining, by the user equipment, a signal strength for each of a plurality of fallback frequencies being received by the user equipment from the base station;
generating, by the user equipment, a measurement report, the measurement report including the signal strengths for each respective one of the plurality of fallback frequencies being received by the user equipment;
sending, by the user equipment, a request to initiate a service procedure with the base station, wherein the request includes the measurement report; and
attaching, in response to a control signal from the base station, to an optimal one of the plurality of fallback frequencies at the user equipment, the optimal one of the plurality of fallback frequencies having one or more of a highest signal strength and a highest signal reliability of each of the plurality of fallback frequencies indicated by the measurement report.