Handoff management without intercell hard handoffs in a multifrequency CDMA system

Abstract

This paper addresses handoff management in a multifrequency code-division multiple-access system with nonuniform traffic loads over cells. We propose a new handoff scheme, called here adaptive handoff management (AHM), in which the intercell hard handoffs, not only incurring equipment cost burden but also degrading call quality, are totally removed. Also strengthened in the AHM is the call-control capability of adaptively reflecting a changing traffic environment. Traffic and mobility analysis is first conducted on a single isolated cell with two cocentered circle boundaries, thereby rendering two key performance measures. We then formulate a mathematical problem of finding optimal parameters of the proposed AHM in which intracell hard handoffs are exploited most effectively. After reporting a simple solution process, computational experiments are conducted to illustrate the superiority of AHM in two key performance criteria.