Invention Application
US20160044545A1 FAST RETURN AFTER CIRCUIT SWITCHED FALL BACK (CSFB) RADIO RESOURCE CONTROL CONNECTION FAILURE
审中-公开
电路断开后快速返回(CSFB)无线电资源控制连接故障
- Patent Title: FAST RETURN AFTER CIRCUIT SWITCHED FALL BACK (CSFB) RADIO RESOURCE CONTROL CONNECTION FAILURE
- Patent Title (中): 电路断开后快速返回(CSFB)无线电资源控制连接故障
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Application No.: US14451794Application Date: 2014-08-05
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Publication No.: US20160044545A1Publication Date: 2016-02-11
- Inventor: Ming YANG , Tom CHIN , Roy Howard DAVIS
- Applicant: QUALCOMM Incorporated
- Main IPC: H04W36/00
- IPC: H04W36/00

Abstract:
A user equipment (UE) improves wireless communication when the UE returns or attempts to return to a first radio access technology (RAT) from a second RAT after a circuit switched fall back (CSFB) call failure due to a radio resource control (RRC) connection failure. In one instance, the UE successfully redirects to the second RAT from a first RAT. The UE then determines that the circuit switched fall back call on the second RAT failed. In response to the determination of the failure, the UE waits for a predetermined amount of time for second RAT re-paging or a user re-initiating the circuit switched call. The UE then performs fast return to the first RAT after the predetermined amount of time expires or in response to a user input.
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