Patent ID: 9167447
Filing Date: 2015-10-20
Classification: H04W

Abstract:
1. A method, comprising: camping in radio resource control (RRC)_IDLE mode by a user equipment (UE) on a cell served by a base station in a wireless communication network; detecting an RRC connection setup failure when performing a random access channel (RACH) procedure in RRC_IDLE mode with the base station in an RRC connection attempt, wherein the UE records a RACH failure event report when the RACH procedure fails; and transmitting the RACH failure event report to the wireless communication network in RRC _CONNECTED mode, wherein the failure event report comprises information refers to the RACH procedure failure in the earlier RRC connection attempt, wherein the RACH failure event report indicates a reason for the RACH procedure failure, and wherein the reason comprises whether the UE receives any RACH response from the base station.