Abstract
Call Admission Control schemes have been used
extensively in improving mobile network quality. Signal quality
degradation, interference and network congestion has been a real
issue for Global System for Mobile Communication (GSM) as the
number of mobile users increased rapidly. It has been an issue in
providing a decent Quality of Service (QoS) to the network users
especially during the period of high network traffic. It is essential to
maintain a certain level of quality in handling mobile network
congestion. Fortunately, Call Admission Control is a strategy that
can provide credible QoS by limiting the number of connections into
the cellular network thereby reducing network congestions, dropping
of calls, interference and other QoS problems. In this paper, we
discuss issues around mobile network congestion, overview of
congestion management schemes, attributes and benefits of Call
Admission Control (CAC). We also highlight different handoff
schemes. We simulated a typical CAC scheme comparing the new
call blocking probability and handoff call probability.