Immune optimization algorithm for solving vertical handoff decision problem in heterogeneous wireless network |
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Authors: | Fang Liu Si-feng Zhu Zheng-yi Chai Yu-tao Qi Jian-she Wu |
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Affiliation: | 1. School of Computer Science and Technology, Xidian University, Xi’an, 710071, China 2. Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of China, Xidian University, Xi’an, 710071, China 3. Department of Mathematics and Information Science, Zhoukou Normal University, Wenchang Road, Zhoukou, Henan province, 466001, China
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Abstract: | In heterogeneous wireless network environment, wireless local area network (WLAN) is usually deployed within the coverage of a cellular network to provide users with the convenience of seamless roaming among heterogeneous wireless access networks. Vertical handoffs between the WLAN and the cellular network maybe occur frequently. As for the vertical handoff performance, there is a critical requirement for developing algorithms for connection management and optimal resource allocation for seamless mobility. In this paper, we develop a mathematical model for vertical handoff decision problem, and propose a multi-objective optimization immune algorithm-based vertical handoff decision scheme. The proposed scheme can enable a wireless access network not only to balance the overall load among all base stations and access points but also maximize the collective battery lifetime of mobile terminals. Results based on a detailed performance evaluation study are also presented here to demonstrate the efficacy of the proposed scheme. |
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