connection failure when the rrc connection reestablishment request is initiated on the reestablishment cell and the second processing module 82 is configured to delete all the information related to the connection failure stored by the ue upon determining that the reestablishment cell does not satisfy the preset cell selection criterion or that the ue fails to receive a rrc connection reestablishment command sent by the network side device controlling the reestablishment cell in an implementation the second processing module 82 configured to determine that the ue fails to receive a rrc connection reestablishment command sent by the network side device controlling the reestablishment cell is configured to start a configured timer when the rrc connection reestablishment request is sent to the network side device controlling the reestablishment cell and to determine that the ue fails to receive an rrc connection reestablishment command sent by the network side device controlling the reestablishment cell when the configured timer expires based upon the same inventive idea as the method an embodiment of the invention provides another user equipment as illustrated in fig9 including a processor 91 and a radio frequency unit 92 where the processor 91 is configured to initiate an rrc connection reestablishment request.