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Admission Control for Voice and Stream-Type Data Services in DS-CDMA Cellular System  

Chang Jin-weon ((국립)한경대학교 정보제어공학과, 전자기술종합연구소)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.9A, 2005 , pp. 737-748 More about this Journal
Abstract
Two flexible admission control schemes for integrated voice and stream-type data services are proposed in DS-CDMA systems. Most Previous studies on admission control have focused on integration of short, bursty Packet-type data services and conventional voice services. However, stream-type data services with a relatively long service holding time are expected to be a considerable portion of data traffic in future generation cellular systems. Scheme I is a basic scheme that accommodates both voice and data services with full bandwidth. However, voice services are given priority over data services using the duration difference between the holding times for these services. Scheme ll uses a different method to efficiently give priority to voice services over stream-type data services. An additional interference margin for voice services is provided by suppressing interference from stream-type data services according to voice access requests and a varying interference status. Performance of the two schemes is evaluated by developing Markovian models. Numerical results show that the voice capacity is highly sensitive to the service holding time of data services while the performance measures of data services are not highly sensitive. Scheme H is a significant improvement over Scheme I for accommodating voice and stream-type data services
Keywords
CDMA; admission control; integrated service; stream-type data; interference suppression;
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