Maximization of Carried Traffic by Prioritizing New Call Attempts in a CDMA Base Station with Finite Receiver Processors

Insook KIM  Dongwoo KIM  Sehun KIM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B   No.6   pp.1879-1882
Publication Date: 2006/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.6.1879
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Switching for Communications
Keyword: 
prioritized call admission control,  CDMA systems,  

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Summary: 
If a certain number of receiver processors (RPs) are reserved exclusively for new calls, some decrease in the probability of blocking new calls (Pn) can be obtained at the expense of increase in dropping handoff calls (Ph). This kind of prioritization has been often considered for handoff calls. Since soft handoff in CDMA systems results in sufficiently low Ph, an idea of prioritizing new calls is interesting when admitting more originating traffic into the system is relatively beneficial, which will be further investigated in this paper. An obvious constraint of the above idea is that Ph should be maintained below a given requirement. We formulate the proposed scheme as a mathematical programming problem and prove it improves the performance in terms of weighted carried traffic. As a result of this work, the prioritization of new calls is shown to possibly improve the traffic-carrying performance of a CDMA base station (BS) while maintaining an acceptable level of Ph, which can be prespecified by a system engineer.