Research on the Hierarchy AAA Scheme for Interworking Authentication in Heterogeneous Networks

Facing the different wireless access networks, this paper has proposed several novel interworking AAA architectures among the 3GPP, WiMax and hotspot wireless LANs. In these architectures, a new entity named standby 3GPP AAA server is defined to cope with the single point failure. Moreover, based on the proposed interworking AAA architectures, a hierarchy AAA scheme is proposed. As a result, the simulation results show that the performance of proposed scheme is better than the existed ones, and the total cost of the authentication process is reduce drastically.