Abstract:

The increasingly demand of service gives rise to the modern telecommunication network's evolution from traditional voice network to the NGN based on IP packet transmission. The shortcoming that original IP network lacks QoS（quality of service）warranty becomes increasingly critical. The telecom IP services face a great threat of DoS, which will bring down call completion rate even cut off the services. This paper analyzes the principle and main characteristics of DoS attack to the telecom IP services under the environment of converged network, compares the differences between the new attack and traditional DoS attack, and proposes an effective detect method and defense DoS attack model. This model provides effective guarantee for the telecom IP service.

Key words: converged network, teleservice, DoS, signaling message