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Call admission control with heterogeneous mobile stations in cellular/WLAN interworking systems

Authors
Lim, Hyung-TaigKim, YounghyunPack, SangheonKang, Chul-Hee
Issue Date
2011
Publisher
SPRINGER
Keywords
call admission control; WLAN; heterogeneous mobile stations; performance analysis; cellular
Citation
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
Indexed
SCIE
SCOPUS
Journal Title
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/134447
DOI
10.1186/1687-1499-2011-91
ISSN
1687-1472
Abstract
Although different call admission control (CAC) schemes have been proposed for cellular-wireless local area network (WLAN) interworking systems, no studies consider mobile stations (MSs) only with a single interface (for either WLANs or cellular networks) and thus these MSs will experience higher call blocking and dropping probabilities. In this article, we propose a new CAC scheme that considers both the MSs with a single interface and with dual interfaces. By employing the concept of guard-bands, the proposed CAC scheme gives higher priority to MSs with a single interface than those with dual interfaces to accommodate more MSs. The call blocking and dropping probabilities are analyzed using Markov chains and how to determine appropriate guard bands for CAC is investigated through cost minimization problems. Analytical and simulation results demonstrate that the proposed scheme can achieve lower blocking probabilities compared with existing schemes that do not include single interface MSs.
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Pack, Sang heon
공과대학 (전기전자공학부)
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