Patent ID: 8135116
Filing Date: 2012-03-13
Classification: G06Q,H04M,H04Q

Abstract:
1. A method of operating a communication network that includes a signaling system seven network, comprising: associating call release messages, which are indicative of call failures in the communication network, with an originating point code and a calling number; and adjusting a rate at which calls originating from the originating point code and the calling number are admitted to the network based on associations between the call release messages and the originating point code and the calling number; wherein the call release messages comprise no circuit available messages and unallocated number messages; wherein associating the call release messages comprises: determining a count of no circuit available messages during a measurement interval; determining a count of unallocated number messages during the measurement interval; determining if the count of no circuit available messages exceeds a no circuit available threshold; determining if the count of unallocated number messages exceeds an unallocated number threshold; determining at a signal transfer point network element a count of initial address messages from the originating point code to a destination point code for the measurement interval; determining at the signal transfer point a count of initial address messages from a calling number to the destination point code for the measurement interval; determining an average count of initial address messages from the originating point code to the destination point code over N previous measurement intervals; and determining an average count of initial address messages from a calling number to the destination point code over the N previous measurement intervals; wherein adjusting the rate at which calls originating from the originating point code and the calling number are admitted to the network comprises performing the following operations if the count of no circuit available messages exceeds the no circuit available threshold and if the count of unallocated number messages exceeds the unallocated number threshold: subtracting the average count of initial address messages from the originating point code to the destination point code over N previous measurement intervals from the count of initial address messages from the originating point code to the destination point code for the measurement interval to obtain a result; dividing the result by the average count of initial address messages from the originating point code to the destination point code over N previous measurement intervals to obtain a percentage increase in initial address messages from the originating point code to the destination point code; determining if the result exceeds an originating point code to destination point code count threshold; determining if the percentage increase in initial address messages from the originating point code to the destination point code exceeds a percentage originating point code to destination point code threshold; and reducing the rate at which calls originating from the originating point code are admitted to the network if the result exceeds the originating point code to destination point code count threshold and the percentage increase in initial address messages from the originating point code to the destination point code exceeds the percentage originating point code to destination point code threshold.