基于灰色系统理论的垂直切换预测模型研究

Study on the Network Vertical Handoff Prediction Model Based on the Grey System Theory

以LTE和Wimax网络融合环境为例,建立垂直切换模型,利用GM(1,1)模型分别对两个网络的接收信号强度进行预测,预测值很好地反应了衰落信号中值电平变化趋势,以其作为切换参量完成切换,仿真对比了预测前后移动台接入Wimax网络的概率,结果表明:该预测模型可以有效地减小切换次数.

A vertical handoff model is built in the integrated mobile environment composed of LTE and Wimax networks.The GM（1,1） is employed to predict the received signal strength of two networks.The predicted values vary in accordance with the fading signals.Therefore,we use them as the handoff parameters to carry out the handoff.The probabilities of mobile station accessing to Wimax network before and after the prediction are simulated and contrasted.The results indicate that the prediction model can effectively reduce the handoff number.