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 journalArticle

7 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

Keywords

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

ASJC Scopus subject areas

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

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