Design of Peer State Acquisition Mechanism for Efficient Dynamic HA Allocation at Diameter-Based AAA Server

Abstract

This Currently, IETF AAA Working Group has developed a new AAA protocol, Diameter, by upgrading the existing protocol, RADIUS. Diameter supports AAA framework over not only Dialup PPP service but also Mobile IP service. For AAA server in order to provide its services into Mobile IP entities, the following facilities should be implemented together with AAA server's original services (Authentication, Authorization and Accounting); dynamic home agent allocation, dynamic home address assignment, the role of Key Distribution Center. In this paper, to provide an efficient dynamic home agent allocation, we propose a peer state acquisition mechanism for the allocation at Diameter-based AAA server. In the mechanism, AAA servers use the peer state information acquired by means of Diameter Base Protocol’s facilities: Capability Exchange, Transport Failure Detection. Then the servers can easily obtain and update the latest state of home agents, as Diameter client. The mechanism allows AAA servers to use the realistic peer state information. . . .