VERTICAL HANDOFF ALGORITHM IN HETEROGENEOUS NETWORKS FOR REDUCING INTERFERENCE  

作　　者：Xie Shengdong Wu Meng 

机构地区：[1]Communication and Information Engineering Institute, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

出　　处：《Journal of Electronics(China)》2009年第1期71-79,共9页电子科学学刊（英文版）

摘　　要：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 inter- ference in CDMA. The scope of WLAN is determined by minimizing interference and each commu- nicating 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.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.

关 键 词：Hybrid networks Vertical handoff INTERFERENCE Simulation annealing 

分 类 号：TN929.5[电子电信—通信与信息系统]