| Adaptive vertical handoff algorithm in heterogeneous networks |
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| 作者姓名： | XIE Sheng-dong WU Meng Communication and Information Engineering Institute Nanjing University of Posts and Telecommunications Nanjing China |
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| 作者单位： | XIE Sheng-dong，WU Meng Communication and Information Engineering Institute，Nanjing University of Posts and Telecommunications，Nanjing 210003，China |
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| 基金项目： | This work is supported by the Planned Scientific Research Project Foundation of Jiangsu Province (BK2004149). |
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| 摘 要： | The integration of cellular network (CN) and wireless local area network (WLAN) is the trend of the next generation mobile communication systems, and nodes will handoff between the two kinds of networks. The received signal strength (RSS) is the dominant factor considered when handoff occurs. In order to improve the handoff efficiency, this study proposes an adaptive decision algorithm for vertical handoff on the basis of fast Fourier transform (FFT). The algorithm makes handoff decision after analyzing the signal strength fluctuation which is caused by slow fading through FFT. Simulations show that the algorithm reduces the number of handoff by 35%, shortens the areas influenced by slow fading, and enables the nodes to make full use of WLAN in communication compared with traditional algorithms.
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| 收稿时间： | 28 August 2006 |
Adaptive vertical handoff algorithm in heterogeneous networks |
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| XIE Sheng-dong,WU Meng Communication and Information Engineering Institute,Nanjing University of Posts and Telecommunications,Nanjing ,China.Adaptive vertical handoff algorithm in heterogeneous networks[J].The Journal of China Universities of Posts and Telecommunications,2007,14(1):22-25. |
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| Authors: | XIE Sheng-dong WU Meng |
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| Affiliation: | Communication and Information Engineering Institute, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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| Abstract: | The integration of cellular network (CN) and wireless local area network (WLAN) is the trend of the next generation mobile communication systems, and nodes will handoff between the two kinds of networks. The received signal strength (RSS) is the dominant factor considered when handoff occurs. In order to improve the handoff efficiency, this study proposes an adaptive decision algorithm for vertical handoff on the basis of fast Fourier transform (FFT). The algorithm makes handoff decision after analyzing the signal strength fluctuation which is caused by slow fading through FFT. Simulations show that the algorithm reduces the number of handoff by 35%, shortens the areas influenced by slow fading, and enables the nodes to make full use of WLAN in communication compared with traditional algorithms. |
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| Keywords: | vertical handoff signal strength slow fading fast Fourier transform |
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