Application Perspective of TCP and UDP during Vertical Handover

The increasing demand of mobile communication is moving towards seamless communication. This had led to the revolution called Next Generation Networks (NGN). In this network to have seamless communication vertical handover plays a crucial role. Handover is a process which keeps continuity of the communication in spite of the coverage area of the present network. To have continuity amongst heterogeneous networks vertical handover takes place. The vertical handover is carried out at the mobile terminal. Hence the mobile node has to have various interfaces compatible with heterogeneous networks. Vertical handover is done with considering few parameters related with Quality of Service (QoS) and Authentication. In this paper we have tried to look into the application perspective during this handovers along with the consideration of various QoS parameters. A specific vertical handover between WiFi and WiMax is simulated.