Patent ID: 9357461
Filing Date: 2016-05-31
CPC Classification: H04W

Claim Text:
1. A method of communication performed by a user equipment (UE) camping on a long term evolution (LTE) cell in a wireless communication system, the method comprising: receiving a circuit switched fallback (CSFB) control message from a network, the CSFB control message comprising prioritization information for circuit switched (CS) service and a system information acquisition indicator; receiving a time gap configuration message indicating a time gap, the time gap being a time interval during which the UE is allowed to temporarily move from the LTE cell to at least one inter-radio access technology (RAT) cell; acquiring system information from the at least one inter-RAT cell in response to the system information acquisition indicator within the time gap; determining whether the CS service is triggered; if it is determined that the CS service is triggered, applying a priority to frequencies of the at least one inter-RAT cell in accordance with the priority information; performing a mobility procedure based on the applied priority; performing a radio resource control (RRC) connection establishment procedure with a selected inter-RAT cell; and initiating the CS service.