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

Hyung Taig Lim, Younghyun Kim, Sangheon Pack, Chul Hee Kang

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    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.

    Original languageEnglish
    Article number91
    JournalEurasip Journal on Wireless Communications and Networking
    Volume2011
    Issue number1
    DOIs
    Publication statusPublished - 2011 Dec 1

    Bibliographical note

    Publisher Copyright:
    © 2011, Lim et al; licensee Springer.

    Keywords

    • WLAN
    • call admission control
    • cellular
    • heterogeneous mobile stations
    • performance analysis

    ASJC Scopus subject areas

    • Signal Processing
    • Computer Science Applications
    • Computer Networks and Communications

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