Research On AAA System Based On Diameter For MIPv6

With the rapid development of Internet, the mobility and access to Internet becomes more and more relevant, the two technologies MIP and the AAA architecture are of central importance of investigations. The key focus about MIP technologies was on developing a technology that made it possible for a user to change its point of attachment to the Internet while still using the same IP connections established once. For the requirement of Internet application, IETF has set up an AAA protocol work group which is responsible for drawing up management protocol of authentication, authorization and accounting information of the network service. However, these two technologies were not developed with each other in mind, the handover time of inter domain is bigger. It is very important to have the smallest possible handover time in a wireless network access technology. This especially makes sense for applications that are time sensitive, as for example real time data traffic. According to existing problems of mobile IPv6 AAA, this thesis proposes an optimized solution of AAA system based on Diameter for mobile IPv6. It integrates the two technologies MIPv6 and AAA in a way that allows shorter handover times. Except of several EAP authentications, roaming inter administrative domain, the solution also supports the various accessing technologies. And it is of small handover time.This thesis deeply studied MIPv6 for mobility, Diameter for authentication/authorization, PANA protocol and EAP protocol. According to the existing problems of mobile IPv6 AAA system, the thesis developed different architectures to integrate the mobility signaling with the authentication/authorization signaling. The main work was the development of four optimization possibilities namely, Indirect BUs, HMIPv6 extension, Hierarchical Authentication/Authorization and Inter AR Authentication/Authorization. Three mobility scenarios were, namely, MIPv6 without extensions, FMIPv6 extension and HMIPv6 extension. For every mobility scenario, a corresponding architecture was chosen. The actual application could be an optimization alone or a combination of optimization solutions. In addition, the thesis proposed the different SAs that have to exist for every architecture.The thesis implements the Indirect BUs solution for the mobility scenario MIPv6 without extensions. The two open source implementations Opendiameter and MIPL were used and extended. The EAP-MD5 method was extended to transport the BU information. Finally, the thesis tested the implementation of optimization system and no optimization system. The tested results showed that it makes sense to use the Indirect BUs if the delays are at least 25 ms, and it reduces the handover time.