Abstract:

3G oriented online charging system （OCS） concept is briefly introduced at first. Then the major diameter credit control （DCC） protocol performance benchmark data to be handled by OCS is described. The composed full-services traffic, user credit status, service duration/traffic distribution are analyzed and the calculation formula for DCC protocol load is presented. The two load control models including tested system unresponsive and responsive model are proposed for different load test cases. The integrated load test model was adapted in 3G OCS development in China Telecom, and the test results show the model can support high performance load test for DCC protocol.

Key words: online charging system, diameter credit control, load test