VERTICAL HANDOFF USING CROSS LAYER DESIGN IN HETEROGENEOUS WIRELESS NETWORKS

Abstract

In 1-leterogeneous mobile networks, it is important to manage mobile nodes mobility with session continuity and minimum handover latency, when the mobile moving from one place to another place, correspondingly it has to change the point of attachment between network. In traditional approach the lack of knowledge about the link layer information creates large handover latency and thereby reducing the performance of the session. In cross layer design the layer 3 entities get the Link level triggers properly and this design can provide information about events which can help in handover decisions. For this, cross layer information has been taken with the help of IEEE 802.21 media independent handover and given it to the higher layers for the handoft' to happen seamlessly. In this thesis, for the handoff with minimum packet loss and fully utilization of the network, a timely layer 2 triggering, an optimum factor has been discussed and optimized the factor for different velocities and different propagation environment, like two ray propagation model, Shadowing model and the performance has been analyzed. For the layer 3 handofT to happen, mobile ipv6 and the proxy mobile 1pv6 has been used. The optimum factor for the various velocities has been discussed and compared the performance.