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Performance Analysis of Hybrid Downlink Call Admission Control Algorithm for Supporting Wireless Multimedia Services  

Kim, Jeong-Ho (이화여자대학교 공과대학 정보통신학과)
Cho, Ho-Shin (경북대학교 전자전기공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.9A, 2004 , pp. 1031-1038 More about this Journal
Abstract
The call admission control algorithm of hybrid scheme is proposed to enhance the QoS(quality of service) of attempted multimedia calls. In the initial stage of 3rd generation multimedia services networks, the major limitations include the small sefyice coverage and the limited radio link capacity. Because the initial massive deployment of network elements such as base stations, base station controllers, and mobile switching centers is restricted to populated areas and the other areas should be covered with the fewer network elements, the radio channel resources are hmited and coverage network is supposed to be established. Therefore the QoS of multimedia services is expected to be severely degraded when tentative traffic hot spot occurs frequently. Thus, the blocking probability of attempted calls mcreases when relatively large number of users try to place multimedia calls in a hot spot area of the wireless networks. In this situation, the proposed hybrid scheme can mitigate the degradation of the QoS of multimedia services by using the available radio channels of the neighboring cells.
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