Abstract
Mobile communication technology evolved rapidly over the last few years due to increasing demands such as accessing Internet services on mobile phones with a better quality of the offered services. The most important issues in this technology are to provide seamless handover when a mobile node (MN) moves between different access networks.The present communication reveals a survey of Vertical Handover Performance metrics within WiMAX and WiFi and describes two techniques Wi-Fi (Wireless Fidelity) & WiMAX(Worldwide Interoperability for Microwave Access) used in wireless communication along with their comparison. The aim of this paper is to study these two techniques and describe the basic Performance metric used for doing vertical handover procedure