Optimal Call Admission Control with QoS Guarantee in a Voice/Data Integrated Cellular Network

Abstmet-This paper addresses the issue of call admission con-trol with the necesary QaS guarantee for a micddala integrated wireless cellular network. Specifically, we propose a new call ad-mission control policy called Dual-Threshold Call Admission Con-ml (DT-CAC) policy. It uses hw rhresholdr, one to reserve chan-nels for narrow-band voice handoffcalls, and the other for wide-band data handoff Irffic. Its unique features am: 1) it adopts the Complete Sharing (CS) approach that maximizes the channel em-ciency; 2) it derives the opIh ” se1 of thresholds that satisfies the QoS target on handoff dropping probabilities for both voice and data traffic, while at the same time minimizing the maximal new call hlwkining probability (voice or data). IQ performance is well supported by simulation results. I. INTRODUCTlON There has been a rapid development in wireless cellular com