Patent ID: 7796522

Claim:
A system for performing a traffic process in an integrated network of a VoIP (Voice over Internet Protocol) network and a PSTN (Public Switched Telephone Network), the system comprising: a softswitch which has a plurality of ASPs (Application Server Processes), transmits a data signal to other nodes through a selected ASP that is selected from among the plurality of ASPs, and transmits a heartbeat request message when a CPU (Central Processing Unit) utilization ratio and an SCTP (System Control Transmission Protocol) level congestion of one of the ASPs exceed respective reference points according to stored AS (Application Server)/ASP information; and a signaling gateway which updates the reference points of the CPU utilization ratio and the SCTP level congestion that are stored in the AS/ASP information in response to the heartbeat request message, transmits a heartbeat acknowledgement message that includes the updated reference points to the softswitch, and checks the CPU utilization ratio and the SCTP level congestion for a plurality of active ASPs within a predetermined CIC (Circuit Identification Code) or SSN (Sub-System Number) range according to the AS/ASP information, to determine the selected ASP when the signaling gateway receives data signal from outside and traffic is distributed, wherein the signaling gateway stores the data signal in a queue for a recovery time when no active ASP is found, the data signal is transmitted to an adjacent node if an active ASP is found within the recovery time, and is destroyed if no active ASP is found within the recovery time, and wherein the signaling gateway distributes the traffic to an active ASP having a lower CPU utilization ratio than a critical value among a plurality of active ASPs, when there are the plurality of active ASPs among the ASPs, and then, again distributes the traffic to an active ASP having the lowest SCTP level congestion when there is more than one active ASP having the lower CPU utilization ratio than the critical value.