Patent ID: 8634527

Claim:
A method for detecting a network performance problem in a communication network, comprising: receiving, by a processor, a plurality of call detail records, wherein the plurality of call detail records is associated with a plurality of different calls, wherein each of the plurality of call detail records comprises a plurality of fields; determining, by the processor, a n-field rule signature from each of the plurality of call detail records, wherein each n-field rule signature comprises n call detail record fields, where n is greater than one; and analyzing, by the processor, the n-field rule signatures from the plurality of call detail records for detecting the network performance problem, wherein the network performance problem is detected when a threshold number of the plurality of call detail records having a particular n-field rule signature exceeds a threshold, wherein the particular n-field rule signature is associated with the network performance problem, wherein the particular n-field rule signature is one of a plurality of different n-field rule signatures comprising a different combination call detail record fields, wherein each n-field rule signature of the plurality of different n-field rule signatures is associated with a different network performance problem.