Investigation on Soft handoff in Cellular System
Neelam Krera, Shelaj Khera · International journal of advanced research in computer science and electronics engineering · 2012
We purpose new analytical Handoffs in a mobile cellular communications environment will become an increasingly important issue as cell sizes shrink to accommodate an ever growing service load demanded. When handoffs occur at the overlapping area of the cells in a cellular system, a mobile station (MS) must communicate with two different base stations (BS) for some period of time. In this case, an MS in the handoff area connects with two BS’s even though the MS does not move from the current cell to the other cell. Soft handoff region is surrounded by inner cell and outer cell boundaries. A soft handoff call occurs when a mobile station either crosses over the inner cell or outer cell boundary or makes a call inside the soft handoff region. The channel efficiency may increase to overcome this situation. Thus, analysis of handoff rate is a key to understanding and increasing channel efficiency. In this paper, a simple and straightforward mathematical function obtaining direction-based soft handoff rate in cellular systems is proposed.