A joint uplink/downlink connection admission control in WLAN/cellular integrated systems

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

Research output: Contribution to journalArticlepeer-review

Abstract

Although different connection admission control schemes in wireless local area network (WLAN)/cellular integrated systems have been proposed in the literature, they do not exploit unique features in uplink and downlink connections. In this paper, we propose a joint uplink/downlink connection admission control scheme in WLAN/cellular integrated systems, in which thresholds for admission control are adaptively determined to maximize the network capacity depending on the uplink and downlink characteristics. We develop an analytical model for the connection blocking cost by means of multi-dimensional Markov chains and present an optimization problem for the thresholds to minimize the blocking cost. Analytical and simulation results show that the proposed connection admission control scheme can reduce the number of blocked connections compared with the WLAN-first scheme.

Original languageEnglish
Pages (from-to)2788-2800
Number of pages13
JournalMathematical and Computer Modelling
Volume57
Issue number11-12
DOIs
Publication statusPublished - 2013 Jun

Bibliographical note

Funding Information:
This work was supported in part by National Research Foundation of Korea Grant funded by the Korean Government ( 2009-0064397 ) and in part by the Korea Communications Commission (KCC) under the R&D program supervised by the Korea Communications Agency ( KCA-2011-10913-0500 ). A preliminary version of this paper was presented at International Workshop on Mobility Modeling and Performance Evaluation (MoMoPE) 2011, Seoul, Korea.

Keywords

  • Blocking cost
  • Cellular/WLAN interworking
  • Connection admission control
  • Markov chain
  • Uplink/downlink characteristics

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications

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