A New Method for Minimizing Unnecessary Handoff in 802.11

Abstract

In a mobile wireless network, the unnecessary handoff is the main issue that effects the performance of the network. A handoff occurs when the Received Signal Strength (RSS) is less than the threshold RSS and the new RSS (from neighbors Access point) is more than the present RSS. Earlier the handoff decision algorithms consider RSS only which results in an increase in handoff counting or handoff rate but in a wireless communication system, the signal strength varies due to scattering, shadowing and reflection because of obstacles in the network region. This variation in RSS leads to unnecessary handoff. In this paper, a new method for handoff decision is proposed to reduce the unnecessary handoff. With simulation results or mathematical analysis 25% unnecessary handoff reduced.