Method, apparatus, and system for detecting a radio network problem

A base station comprising:

• a receiving unit configured to receive, from a user equipment (UE), problem information about a handover failure occurs on the UE in a cell controlled by another base station, after a radio resource control (RRC) connection is reestablished or established between the UE and a cell controlled by the base station;
• and
• a transmitter configured to transmit the received problem information to the another base station controlling the cell where the handover problem occurs.

A method for detecting a radio network problem, the method comprising:

• receiving, by a first base station controlling a cell that a radio resource control (RRC) connection is reestablished or established with a user equipment (UE), problem information about a handover failure occurs on the UE in a cell from the UE, after the RRC connection is established;
• and
• transmitting, by the first base station, the problem information to a second base station controlling the cell where the handover failure occurs, upon receiving the problem information from the UE.