基于信号强度和功率损耗的分层网络切换算法  

Handoff Algorithm for Hierarchical Cell Networks Based on Received Signal Strength and Power Loss

作　　者：徐鹏[1] 方旭明[1] 杨俊[1] 

机构地区：[1]西南交通大学信息编码与传输四川省重点实验室,四川成都610031

出　　处：《西南交通大学学报》2011年第1期98-102,108,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(60772085);铁道部科技研究开发计划重点课题(2009X009-E)

摘　　要：为解决毫微微小区基站布置在宏蜂窝小区中引起的切换问题,提出了一种新的分层网络切换算法.该算法主要基于用户接收的信号强度和信号在传播过程中的功率损耗2个参数进行切换判决.当依据接收的信号强度进行切换判决,且其不能有效工作时,将功率损耗作为辅助判决条件,可提高毫微微小区的利用率和降低算法复杂度.仿真分析结果表明,与传统的切换算法相比,该算法的切换次数增加了1倍;与基于宏基站和毫微微小区基站联合信号强度的切换算法相比,减少了1/2不必要的切换次数.In order to settle the handoff problem resulted from deploying femtocell base stations in a macrocell,a new handoff algorithm for hierarchical cell networks was proposed.This algorithm makes a handoff judgment in light of signal strength received by users and signal power loss during transmission.When the received signal strength（RSS） can not work efficiently,the power loss serves as the auxiliary condition to improve the usage of femtocells and cut down the complexity of the new handoff algorithm.The simulation results show that the proposed algorithm doubles the number of handoffs compared with the conventional algorithm but reduces half the number of unnecessary handoffs compared with a handoff algorithm based on the combining RSSs from macrocell and femtocell base stations.

关 键 词：分层网络 毫微微小区 功率损耗 接收信号强度 切换 

分 类 号：TN925[电子电信—通信与信息系统]