A new approach for vertical handoff in wireless 4G network

Abstract

Future generation 4G wireless network is designed for flawless and continues connections between devices of several independent wireless networks like WLAN, GPRS and so on. Heterogeneous wireless networks will be dominant in the next-generation wireless networks with the integration of various wireless access networks. One of the most challenging problems for coordination is vertical handoff, which is the decision for a mobile node to handoff between different types of networks in heterogeneous network. Handoff is based on received signal strength comparisons; in this paper we develop a Vertical Handoff strategy for 4G network based on bandwidth and Power (Signal Strength) between different networks .we compare the results with handoff mechanism depending upon only signal strength. Results show a significant performance improvement of the proposed system over the signal strength driven handoff or connectivity driven handoff. © 2012 Springer-Verlag GmbH.