Patent ID: 7715875

Claim:
A base station controller comprising a C-plane which executes call setup control identified by a user identifier and a service identifier, a U-plane which executes user data transmission process, and a T-plane which executes physical interface termination, wherein each plane is provided with a plurality of subunits for each of a series of functions, each subunit has a plurality of process entities provided for each function, and a controller for controlling the operation of the process entities and notifying, upon occurrence of an error in any of the process entities, the information to other subunits to execute the necessary error process, and wherein in the base station controller of a radio communication network, said controller in each plane comprises a table for storing the relationship between the combination of the name of a message transmitted and received by said C-plane to and from a user terminal outside the base station controller in order to set up a call, and the service identifier of the call which is set up using the message; and a name of a process entity which processes the call, and upon detection of failure in any of the subunits of said C plane, said C-plane controller sends, to each plane controller, an error notification including the message name of the call in which failure is detected, the user identifier, and the service identifier, wherein a service identifier is used to search a process entity to identify quickly the Parts which caused an error in a specified call of a specified user, and the controller of each plane including said C plane searches the process entity name from said table with the message name and the service identifier within said error notification, and outputs alarm information including the user identifier, the subunit identifier, and the process entity name.