A DYNAMIC DECISION MODEL FOR VERTICAL HANDOFFS ACROSS HETEROGENEOUS WIRELESS NETWORKS

Abstract

The convergence of heterogeneous wireless access technologies characterizes the 4G wireless networks. In such network environment the user equipped with multiple network interfaces, would want to roam between different networks without any interruption in the running applications and services, in such a way that minimise the network usage cost. For this, a seamless and efficient handoff between different access technologies (vertical handoff) is essential. However, the heterogeneous co-existence of access technologies with largely different characteristics creates a decision problem of determining the “best” available network at “best” time to perform an efficient handoff. In this major project, we propose a Dynamic Decision Model (DDM) to decide the “best” network at “best” time moment to handoffs. The proposed dynamic decision model make the right vertical handoff decisions by determining the “best” network at “best” time among available networks based on, dynamic facto...