A probabilistic call admission control algorithm for WLAN in heterogeneous wireless environment

Sukyoung Lee, Kyungsoo Kim, Kunho Hong, David Griffith, Yoon Hyuk Kim, Nada Golmie

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


In an integrated WLAN and cellular network, if all mobile users whose connections originate in the cellular network migrate to the WLAN whenever they enter the double coverage area, the WLAN will be severely congested and its users will suffer from performance degradation. Therefore, we propose a Call Admission Control (CAC) algorithm that allows the WLAN to limit downward Vertical Handovers (VHOs) from the cellular network to reduce unnecessary VHO processing. Numerical and simulation results demonstrate that our CAC scheme reduces the unnecessary VHO processing while keeping the DVHO blocking rate within acceptable limits and maintaining reasonable throughput in the WLAN.

Original languageEnglish
Article number4907439
Pages (from-to)1672-1676
Number of pages5
JournalIEEE Transactions on Wireless Communications
Issue number4
Publication statusPublished - 2009 Apr

Bibliographical note

Funding Information:
This work was supported in part by the IT R&D program of MKE/IITA [2007-F-038-02, Fundamental Technologies for the Future Internet] and Information Technology Research Center (ITRC) support program supervised by the MKE/IITA (IITA-2008-C1090-0803-0002), Korea. It was also supported in part by the NIST/Office of Law Enforcement Standards (OLES).

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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