Abstract:

The amount of various network elements and alarms trigged is pretty startling with the expansion of the network.The traditional network operation and maintenance，that is，passively processed worksheet after the occurrence of network failure one by one，has been unable to adapt to the complex network management today.The various types of important service-related network alarm titles were sorted out，and the fluctuation under control for kinds of important alarms by control chart，establishes the graded early-warning model and algorithm for alarm mutation in networks combining with the service-related analysis，were analyzed.At last，a dynamic closed-loop control mechanism，which was preceded by fault occurred and actively digs into hidden troubles，was proposed.

Key words: early warning, alarm mutation, control chart