Abstract
A vertical handoff decision algorithm in heterogeneous networks composed of CDMA Cell Networks (CN) and Wireless Local Area Network (WLAN) is proposed to minimize the total interference in CDMA. The scope of WLAN is determined by minimizing interference and each communicating node shall handoff to WLAN as soon as it enters the scope. We first propose a model for heterogeneous networks, and based on it we obtain the close-form expression of interference. In order to minimize interference, we use simulation annealing method to get the WLAN radius, which is called basic algorithm. In order to reduce the interference further, we improve the basic and get the enhanced algorithm. Through numerical computing, we analyze the interference in condition of different call arrive rates, and results show that the enhanced can reduce interference more greatly than the basic.
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Communication author: Xie Shengdong, born in 1978, male, Ph.D. candidate.
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Xie, S., Wu, M. Vertical handoff algorithm in heterogeneous networks for reducing interference. J. Electron.(China) 26, 71–79 (2009). https://doi.org/10.1007/s11767-007-0125-x
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DOI: https://doi.org/10.1007/s11767-007-0125-x