Method for Performance Indicator Monitoring in Mobile Communication System

PURPOSE: A method for monitoring a performance indicator in a mobile communication system is provided to reduce time required for sensing the abnormality of a network and easily take necessary measures. CONSTITUTION: Performance indicator values are calculated by receiving data related to performance and failure from a mobile switching center(S201). The performance indicator values are compared with each lower control limit of preliminarily set performance indicator to confirm whether the performance is abnormal(S203). If not, the corresponding network is judges as normal and the result is transmitted to a main server to be stored(S207,S219). If so, the collected failure data is searched and the tendency of past performance indicator values are analyzed(S205). It is judged whether the tendency of past performance indicator values has a specific shape decided by an operator(S209). If so, the corresponding network is judged as performance abnormality(S217). If not, the collected failure data is searched to confirm whether the performance abnormality is the instant simple abnormality or the result of a change in a network environment(S211,S213). It is judged that the abnormality is the instant performance abnormality(S215).