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Cost-Based Vertical Handover Decision Algorithm for WWAN/WLAN Integrated Networks

  • Kun Ho Hong
  • Su Kyoung Lee
  • Lae Young Kim
  • Pyung Jung Song
Open Access
Research Article

Abstract

Next generation wireless communications are expected to rely on integrated networks consisting of multiple wireless technologies. Heterogeneous networks based on Wireless Local Area Networks (WLANs) and Wireless Wide Area Networks (WWANs) can combine their respective advantages on coverage and data rates, offering a high Quality of Service (QoS) to mobile users. In such environment, multi-interface terminals should seamlessly switch from one network to another in order to obtain improved performance or at least to maintain a continuous wireless connection. Therefore, network selection algorithm is important in providing better performance to the multi-interface terminals in the integrated networks. In this paper, we propose a cost-based vertical handover decision algorithm that triggers the Vertical Handover (VHO) based on a cost function for WWAN/WLAN integrated networks. For the cost function, we focus on developing an analytical model of the expected cost of WLAN for the mobile users that enter the double-coverage area while having a connection in the WWAN. Our simulation results show that the proposed scheme achieves better performance in terms of power consumption and throughput than typical approach where WLANs are always preferred whenever the WLAN access is available.

Keywords

Cost Function Area Network Selection Algorithm Mobile User Wireless Local Area Network 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© KunHo Hong et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Authors and Affiliations

  • Kun Ho Hong
    • 1
  • Su Kyoung Lee
    • 1
  • Lae Young Kim
    • 2
  • Pyung Jung Song
    • 3
  1. 1.Department of Computer ScienceYonsei UniversitySeoulSouth Korea
  2. 2.LG ElectronicsSouth Korea
  3. 3.Electronics and Telecommunications Research Institute (ETRI)DaejonSouth Korea

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