Résumé: This article describes a Three Level Mobility Model (TLMM) for next generation wireless IP-based networks. TLMM is modular and straightforward as it leverages existing protocols, such as Mobile IPv4 as global mobility management and TeleMIP for intradomain mobility management for locating roaming nodes. It uses three dynamically autocon.gured care-of-addresses (CoAs) for routing the packets destined to mobile nodes. A Gateway Mobility Agent at the boundary of two domains provides a global CoA and identi.es a mobile node’s attachment to the current domain. A regional CoA provides the speci.c area of the mobile node’s attachment within the domain, while a local CoA changes every time the mobile changes subnets and identi.es the mobile’s attachment to the subnet level granularity. A dynamic hando. policy for supporting fast and seamless hando. reduces latency at a mobile node and minimizes packet loss. Simulation results using ns-2 supports our model. A detailed analytical framework for dynamic hando. has been presented in depth to estimate hando. initiation instance for reducing the probability of false hando.s.

Langue: Anglais