Signal Strength Ratio Based Vertical Handoff Decision Algorithms in Integrated Heterogeneous Networks

The desired characteristic of next generation wireless communication is convergence of various heterogeneous technologies. By integrating heterogeneous technologies user will be provided high data rates, good service and connectivity. In this paper we consider the integration of wireless local area network (WLAN) in 3G network. We evaluate performance of two vertical handoff (VHO) algorithms for an integrated 3G and WLAN network. The number of handoffs and decision delay are estimated as the mobile terminal (MT) moves from the centre of 3G network base station (BS) towards the AP(access point) of WLAN with hysteresis and dwell timer approaches. We consider the log normal distribution which describes the shadow fading effect and Mapping of resources between heterogeneous networks also explained in this.