Invention Grant
- Patent Title: Selection of network connection for call retry based on neighbor information in system information blocks
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Application No.: US15913187Application Date: 2018-03-06
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Publication No.: US11219080B2Publication Date: 2022-01-04
- Inventor: Jun Liu , Hsin-Fu Henry Chiang
- Applicant: T-Mobile USA, Inc.
- Applicant Address: US WA Bellevue
- Assignee: T-Mobile USA, Inc.
- Current Assignee: T-Mobile USA, Inc.
- Current Assignee Address: US WA Bellevue
- Agency: Lee & Hayes, P.C.
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04W76/19 ; H04W88/06 ; H04W84/04 ; H04W84/12 ; H04W88/08

Abstract:
User equipment (UE) can select a connection type for a retry of a failed call based on system information blocks (SIBs) received from a serving base station of a first radio access layer of a telecommunication network. When the UE experiences a call setup failure of a call attempted through the serving base station of the first radio access layer, the UE can determine whether neighbor information within the SIBs includes information about a neighboring base station of a second radio access layer. If it does, the UE can select a retry connection type as a connection to the neighboring base station of the second radio access layer. If it does not, the UE can select the retry connection type as a connection to an alternate network. The UE can then retry the call through the selected retry connection type.
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