Invention Application
US20160057671A1 FAST RETURN AFTER CIRCUIT SWITCHED FALL BACK (CSFB) CALL RELEASE
审中-公开
电路切换后快速返回(CSFB)呼叫
- Patent Title: FAST RETURN AFTER CIRCUIT SWITCHED FALL BACK (CSFB) CALL RELEASE
- Patent Title (中): 电路切换后快速返回(CSFB)呼叫
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Application No.: US14465998Application Date: 2014-08-22
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Publication No.: US20160057671A1Publication Date: 2016-02-25
- Inventor: Ming YANG , Tom CHIN
- Applicant: QUALCOMM Incorporated
- Main IPC: H04W36/08
- IPC: H04W36/08 ; H04W36/00 ; H04W36/30

Abstract:
A user equipment (UE) reduces delays associated with returning to a first radio access technology (RAT) after redirection to a second RAT. The UE moves from a first radio access technology (RAT) to a second RAT to permit a circuit switched (CS) call. When the UE fails to return to the first RAT after releasing the circuit switched call on the second RAT, the UE establishes a first packet switched (PS) call on the second RAT. The first packet switched call may be triggered by a background application. The UE periodically suspends communications during the first packet switched call on the second RAT. The UE creates a forced measurement gap during suspension of the first packet switched call in the second RAT to monitor the first RAT and returns to the first RAT to resume the first packet switched call when the monitoring detects a cell in the first RAT.
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