NETWORK PERFORMANCE SIMULATION SYSTEM AND NETWORK PERFORMANCE SIMULATION METHOD

PURPOSE: A system and a method for verifying a communication performance are provided to authorize a generated large amount verification call to a communication network which is a verification target. CONSTITUTION: A communication network(100) processes a call corresponding to at least one terminal device. The communication network provides communication service. If a large amount call verification is requested, a communication network certifying device(200) generates a verification call corresponding to a plurality of virtual terminals during a fixed saturation call generating time according to a previously defined saturation state generation policy. The communication network verification device authorizes a verification call of a large amount during call generation time to the communication network which is a verification target.