| 用于异构网络的差值门限模糊切换算法 |
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| 引用本文： | 张天魁,邱禹,冯春燕.用于异构网络的差值门限模糊切换算法[J].西安电子科技大学学报,2011,38(1):165-170. |
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| 作者姓名： | 张天魁 邱禹 冯春燕 |
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| 作者单位： | 北京邮电大学信息与通信工程学院;普天信息技术研究院有限公司; |
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| 基金项目： | 国家自然科学基金资助项目(2003112255); 中央高校基本科研业务费资助项目(BUPT2009RC0113) |
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| 摘 要： | 为了提高用户在异构网络中进行垂直切换的准确度,减少"乒乓效应",提出了一种差值门限模糊切换算法(Difference Threshold based Fuzzy Handover,DTFH).DTFH算法考虑异构网络中的切换触发与切换判决两个方面.用户获得当前网络和目标网络的信噪比差值,根据该信噪比差值与设定的切换触发门限的比较结果进行切换触发;然后,采用模糊逻辑方法得到用户当前网络与目标网络的模糊判决值,根据两个网络的模糊判决值之差与设定的切换判决门限的对比结果进行切换判决.以LTE和WiMAX异构网络为仿真场景,仿真结果表明,与传统切换算法相比,DTFH算法能在减少"乒乓效应"的同时,提高用户吞吐量,从而提高垂直切换的性能.
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| 关 键 词： | 异构网络 垂直切换 触发 判决 模糊逻辑 |
| 收稿时间： | 2009-12-23 |
Difference threshold based fuzzy handover algorithm for heterogeneous networks |
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| ZHANG Tiankui,QIU Yu,FENG Chunyan.Difference threshold based fuzzy handover algorithm for heterogeneous networks[J].Journal of Xidian University,2011,38(1):165-170. |
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| Authors: | ZHANG Tiankui QIU Yu FENG Chunyan |
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| Affiliation: | (1. SICE, Beijing Univ. of Posts and Telecommunications, Beijing 100876， China;
2. Potevio Institute of Technology Co., Ltd., Beijing 100080， China) |
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| Abstract: | In order to improve the accuracy of vertical handover and to reduce the Ping-Pong effect,a difference threshold based fuzzy handover(DTFH) algorithm is proposed for heterogeneous networks.The handover trigger and handover decision are considered for DTFH.The signal to noise ratio(SNR) gap between the target network and the current network is obtained by the mobile station(MS),and the SNR gap between the two networks is compared with a predefined trigger threshold for handover trigger.Then based on the metho... |
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| Keywords: | heterogeneous networks vertical handover trigger decision fuzzy logic |
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