Interference reduction and multiclass call admission control Mac protocol for W CDMA wireless networks

Abstract

Efficient Call Admission Control is necessary for the QoS provisioning in Wide Band Code Division Multiple Access environment Traffic in the upcoming wireless networks is expected to be extremely non stationary For the traffic of real time classes which are non stationary at the base station the performance of scheduler gets degraded due to the presence of arrival rate estimation errors Inefficient resource distributions and unequal delay variations from the targets are caused because of the estimation errors We have designed a new CAC algorithm with power control for multiple services like voice video and data for multiclass users It determines the optimum set of admissible users with optimum transmitting power level so as to minimize the interference level and call rejection rate In addition to this an adaptive scheduling scheme to allocate optimum rate for each traffic queue is used to minimize the scheduling delay By simulation experiments we show that the proposed algorithms achieve reduced call blocking probability optimum rate with reduced delay newline