US 12,004,019 B2
Techniques for improvement of voice over Wi-Fi to voice over cellular handovers
Vikram Singh, San Diego, CA (US); Yong Xie, San Diego, CA (US); and Carlos Marcelo Dias Pazos, Carlsbad, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 5, 2021, as Appl. No. 17/450,018.
Claims priority of provisional application 63/198,307, filed on Oct. 9, 2020.
Prior Publication US 2022/0116829 A1, Apr. 14, 2022
Int. Cl. H04W 36/00 (2009.01); H04W 36/30 (2009.01)
CPC H04W 36/0022 (2013.01) [H04W 36/30 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a user equipment (UE), comprising:
determining, during an active call on a first radio access technology (RAT), that a first condition for performing a handover from the first RAT to a second RAT is satisfied;
determining that the second RAT would trigger a fallback to a third RAT after the handover from the first RAT to the second RAT;
determining that a second condition for performing a handover from the third RAT to the first RAT is satisfied; and
refraining from performing the handover from the first RAT to the second RAT based at least in part on the determination that the second RAT would trigger the fallback and the determination that the second condition for performing the handover from the third RAT to the first RAT is satisfied.