Invention Grant
- Patent Title: Preempt single radio voice call continuity by moving to voice over WiFi to improve voice/video call quality
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Application No.: US16870686Application Date: 2020-05-08
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Publication No.: US11317333B2Publication Date: 2022-04-26
- Inventor: Yong Xie , Arvind Vardarajan Santhanam , Carlos Marcelo Dias Pazos , Vikram Singh , Mouaffac Ambriss , Sumit Kumar Singh
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Procopio, Cory, Hargreaves & Savitch LLP
- Agent Dalei Dong
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04W36/18 ; H04B17/318 ; H04W36/00 ; H04W36/08 ; H04W36/30

Abstract:
A configuration is disclosed to enable a UE to preempt SRVCC by triggering a handover to a Wi-Fi network. The apparatus determines whether a Wi-Fi cell is viable as a first target cell, from a plurality of target cells, serving the UE to continue the active transmission on the Wi-Fi cell. The apparatus extends a TTT timer length based at least in part on the determination that the Wi-Fi cell is viable as the target cell serving the UE to continue the active transmission on the Wi-Fi cell. The apparatus initiates a handover to the Wi-Fi cell from the first network prior to the expiration of a TTT timer and prior to the first network initiating a handover to a second target cell, from the plurality of target cells, on a second network.
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