Extensive DBA-CAC mechanism for maximizing efficiency in 3GPP: LTE networks

In this continuous fast world of mobile devices there is always a growing demand of high rate services. So a call has to be continuous with same data rates during a handoff. This paper deals with a novel approach DBA-CAC to reduce the call dropping probability while ensuring QoS demands are met in LTE wireless networks. The reduction is based on Adaptive Call Admission Control (Ad-CAC) scheme which gives priority to handoff call over the new calls. The Dynamic Bandwidth Adaptation (DBA) approach is used to maximize the overall system utilization while keeping the blocking rates low. DBA algorithm is used in two phases, when a call arrives and when a call ends. The DBA approach helps in predicting the user behavior and allocation the resources in advance, hence utilizing the resources more efficiently. This approach also maintains a low new call blocking rates.