基于终端移动状态的LGD触发算法  

Terminal Moving State-based Link-Going-Down Trigger Algorithm

作　　者：张汝云[1] 王玉红[1] 黄开枝[1] 季新生[1] 

机构地区：[1]国家数字交换系统工程技术研究中心,郑州450002

出　　处：《计算机工程》2010年第19期117-119,122,共4页Computer Engineering

基　　金：国家"863"计划基金资助项目(2007AA01Z434;2008AA011001)

摘　　要：针对垂直切换中LMS预测LGD触发机制没有考虑终端移动状态的问题,提出基于终端移动状态的LGD触发算法,由终端移动模型推导出移动状态(速度和方向)与信号强度的关系,并将信号强度推导值与抽样值加权求和后采用LMS算法预测信号强度的变化趋势。仿真表明,改进后的LMS算法预测误差小,可以降低丢包率和空闲时间。Timely firing of Link-Going-Down（LGD） trigger is critical to handover performance and is significant in determining whether the handover completes successfully.This paper proposes the terminal moving state-based LGD trigger algorithm.It calculates the received signal power from the terminal moving model,and puts it as part of the predictive process.Simulation results show that the proposed algorithm can significantly decrease packet lost and the time between handover finishing and link down.

关 键 词：LGD触发 切换代价 终端移动模型 LMS预测机制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]