Abstract
This paper addresses potential security threats that arise from the interconnection of different access technologies in next generation mobile networks (NGMN). A generic hierarchical security architecture is proposed that is capable of detecting and isolating the dominant security threats namely denial- of-service (DoS), distributed DoS (DDoS) and worm attacks. The architecture utilizes an anomaly-based security detection mechanism, which resolves the attacks through a cooperative approach between the node under attack and its corresponding higher tier nodes. The results from the ns-2 based simulation indicate that the proposed security architecture is capable of mitigating these threats in an effective manner.
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