Modified Vertical Handoff Decision Algorithm for Improving Qos Metrics in Heterogeneous Networks

In 4G networks, the meshing of WiMAX and WLAN has been a tough task. Issues regarding intermeshing of WIMAX and WLAN networks during vertical handoff have to be analyzed. Two interconnected networks such as WIMAX and WLAN has been proposed. Our proposed scheme provides better connectivity between fixed and mobile stations. In our proposed framework, two heterogeneous networks have been interconnected with each other and vertical handoff occurs between the two networks. A modified vertical handoff decision algorithm has been designed to calculate the bandwidth in WLAN and WIMAX networks. Packet delay is also calculated in modified algorithm. By calculating the bandwidth and packet delay, QOS metrics have been achieved by increasing the bandwidth and reducing the packet delay. Ad hoc network is the combination of wireless nodes without any infrastructure. It follows decentralized. Our proposed system improves the bandwidth and packet delay.