Patent ID: 9578549
Date: 2017-02-21
CPC Classifications: H04W

Claim:
1. A method for communicating, the method comprising: acquiring, by a first base station, an identifier of a UE accessing a first cell of the first base station; storing, by the first base station, UE context information of the UE after a handover of the UE to a second cell of a second base station, and storing a cell identifier of the second cell; receiving, by the first base station, a radio resource control (RRC) connection request message after a radio link failure between the UE and the second cell occurs, the RRC connection request message including an identifier of the UE and information indication whether a reason for an establishment of a RRC connection is due to a circuit switched fallback (CSFB); searching, by the first base station, a UE context based on the identifier of the UE in the RRC connection request message; and detecting, by the first base station, a reason for the failure based on the UE context, if the reason is not due to the CSFB.