Reduced Call Drop Rate in a 4G Network using Vertical Handoff Algorithm

Mobile communication towers are used in many in personal and industrial purposes. It provides a continuous connectivity to a Mobile Nodes (MN) and permits them to change their connection point from current access point to new base station while needed. Handover has become an essential part of mobile communication system because of the limited coverage area of cells. In this paper, investigate the various handover management technologies for providing pure mobility between different access techniques such as GPRS, UMTS, and WI-FI, WiMaX. Vertical handoff refers to a network node changing the type of connectivity it uses to access a supporting infrastructure, usually to support node mobility. Vertical handover can be triggered by various parameters like RSS, bandwidth, packet receiving rate, etc. So in this paper Minimizing delay in vertical handoff to reduced call drop rate in 4G network.