Immune optimization algorithm for solving vertical handoff decision problem in heterogeneous wireless network
Immune optimization algorithm for solving vertical handoff decision problem in heterogeneous wireless network
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DOI：
10.1007/s11276-012-0481-9
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发表时间：
2012-08
影响因子：
3
通讯作者：
Fang Liu;Si-Feng Zhu;Zheng-yi Chai;Yutao Qi;Jianshe Wu
中科院分区：
文献类型：
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作者：
Fang Liu;Si-Feng Zhu;Zheng-yi Chai;Yutao Qi;Jianshe Wu
在异构无线网络环境中，无线局域网（WLAN）通常部署在蜂窝网络的覆盖范围内，以向用户提供在异构无线接入网络之间无缝漫游的便利。WLAN和蜂窝网络之间的垂直干扰可能频繁发生。至于垂直切换性能，有一个关键的要求，发展算法的连接管理和优化资源分配的无缝移动性。建立了垂直切换决策问题的数学模型，提出了一种基于多目标优化免疫算法的垂直切换决策方案。所提出的方案可以使无线接入网络不仅平衡所有基站和接入点之间的整体负载，而且最大限度地提高集体电池寿命的移动的终端。详细的性能评估研究的基础上的结果也在这里展示所提出的计划的有效性。
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.