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QoS-Aware Call Admission Control for Multimedia over CDMA Network  

정용찬 (성균관대학교 정보통신공학부)
정세정 (성균관대학교 정보통신공학부)
신지태 (성균관대학교 정보통신공학부)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.40, no.12, 2003 , pp. 106-115 More about this Journal
Abstract
Diverse multimedia services will be deployed at hand on 3G-and-beyond multi-service CDMA systems in order to satisfy different quality of service (QoS) according to traffic types. In order to use appropriate resources efficiently the call admission control (CAC) as a major resource control mechanism needs to be used to take care of efficient utilization of limited resources. In this paper, we propose a QoS-aware CAC (QCAC) that is enabled to provide service fairness and service differentiation in accordance with priority order and that applies the different thresholds in received power considering different QoS requirements such as different bit error rates (BER) when adopting total received power as the ceil load estimation. The proposed QCAC calculates the different thresholds of the different traffic types based on different required BER applies it for admission policy, and can get service fairness and differentiation in terms of call dropping probability as a main performance metric. The QCAC is aware of the QoS requirement per traffic type and allows admission discrimination according to traffic types in order to minimize the probability of QoS violation. Also the CAC needs to consider the resource allocation schemes such as complete sharing (CS), complete partitioning (CP), and priority sharing(PS) in order to provide fairness and service differentiation among traffic types. Among them, PS is closely related with the proposed QCAC having differently calculated threshold per each traffic type according to traffic priority orders.
Keywords
call admission control; CDMA networks; QoS(Quality of Service); fairness; service differentiation;
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