Performance modeling on handover latency in Mobile IP Regional Registration

The authentication, authorization, accounting (AAA) infrastructure in Mobile IP network is designed to distribute keys to network entities for signaling message protection. In Mobile IP network, Regional Registration is employed to migrate the high signaling delay when a mobile user moves between network agents within the same visited domain. How to distribute keys in Mobile IP Regional Registration is still an open issue and adopting AAA infrastructure may be a suitable solution. However, in the literature, no work has a sound analytical study on Regional Registration in Mobile IP network with AAA infrastructure. In this paper, we develop a complete analytical model to investigate handover delay of Mobile IP network with and without Regional Registration. The accuracy of this model is validated by the developed simulations. From the proposed model, this paper precisely justifies performance improvement of Regional Registration in Mobile IP network.