Vertical Handoff decision based on MADM for Network selection in 4G Heterogeneous Wireless Networks

Seamless continuity is the main goal and challenge in fourth generation Wireless networks, to achieve seamless connectivity handoff technique is used, Handoff mechanism are mainly used when a mobile terminal(MT) is in overlapping area for service continuity. In Heterogeneous wireless networks main challenge is continual connection among the different networks like WiFi, WiMax, WLAN, WPAN etc. In this paper, Vertical handover decision schemes are compared, Simple Weighted Additive method and Weighted product model are used to choose the best network from the available Visitor networks (VTs) for the continuous connection by the mobile terminal. In our work we mainly concentrated to the handover decision phase and to reduce the processing delay in the period of handover. In this paper both methods are compared with the QoS parameters of the mobile terminal (MT) to connect with the best network.