基于终端移动状态的LGD触发算法

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。

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

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.