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)


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
Issue number1
Publication statusPublished - 2011 Dec 1

Bibliographical note

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


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

ASJC Scopus subject areas

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


Dive into the research topics of 'Call admission control with heterogeneous mobile stations in cellular/WLAN interworking systems'. Together they form a unique fingerprint.

Cite this