Performance Analysis of a Threshold-based Call Admission Control Scheme for Multimedia Wireless Networks (original) (raw)

pico or micro-sized cells will increase the handoff rate, and thus, leads to higher handoff dropping rate The allocation of scarce resources to support real-that makes QoS guarantees to the multimedia services time multimedia services with different Quality of difficult. Multimedia services impose stringent QoS Service (QoS) requirements is a fundamental problem demands on the wireless networks. in wireless cellular networks. In this paper, we In wireless cellular networks, user' s QoS propose a new Call Admission Control (CAC) and requirements can be quantitatively expressed in terms resource reservation scheme for cellular-based of probabilistic connection-level QoS parameters such multimedia wireless networks. The well-known CAC as Call Blocking Probability (CBP) and Call Dropping guard channel policy [3] is modified to be applicable Probability (CDP) [2]. Therefore, one of the most for different traffic classes with diverse QoS important connection-level QoS issues is how to requirements. The proposed scheme is modeled as reduce and control CDP due to the lack of available M/MI/CC queueing system and the performance bandwidth so that mobile users can continue their measures, call blocking probability and call dropping ongoing connections. Efficient Call Admission Control probability are computed. (CAC) and Bandwidth Reservation (BR) schemes are necessary to maintain the desired QoS. CAC schemes