Base station controller for radio communication network and method of collecting alarm information thereof

A method for collecting alarm information for use in 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,

• within the base station controller,
• each plane is provided with a plurality of subunits for each of a series of functions, and wherein
• 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,
• said method of collecting alarm information, comprising the steps of:
• preliminarily storing, into said each plane controller, a table indicating the relationship between the combination of the name of the message transmitted and received by said C-plane to and from the outside in order to set up a call, and a service identifier of the call which is set up using the message;
• and the name of the process entity which processes the call;
• causing a controller in the sub-controller to send, upon detection of failure in any of the subunits of said C plane, to each plane controller an error notification including the message name of the call in which the failure is detected, the user identifier, and the service identifier;
• and
• causing each plane controller including said C plane to search the process entity name from said table with the message name and the service identifier within the error notification, and to output alarm information including the user identifier, the subunit identifier, and the process entity name.